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HomeMy WebLinkAbout2150 PALOMAR AIRPORT RD; SOILS; CB044152; Soils ReportURS December 14,2004 Mi. Richard Sax, Esq. c/o Mr. Joe Pate Palomar Airport Center LLC 2192 Palomar Airport Road, Second Floor Carlsbad, CA 92008 Subject Review of Foundation Plans Proposed Palomar Airport Redevelopment McClellan-Palotnar Airport Carlsbad, California lias Project No. 27662028.04000 Dear Mr. Pate: This letter provides the results of ft review of foundation plans prepared for the subject project URS Corporation (URS) previously performed geotechnical investigations for the site. The results of the geotechnical investigations are presented in our report tided "Geotechnical Investigation, Proposed Palomar Airport Redevelopment, McClellan-Palomar Airport, Carlsbad, California," dated February 11,2004 (URS Project No. 27662028.04000). Addendum No. 1, dated April 20, 2004, provided revised recommendations for design of concrete floor slabs and pavements, and Addendum No. 2, dated November 11,2004, provided recommendations for design of retaining walls at the project We have reviewed Drawings Sheets FI.O, Fl.l, F1.2,1F2.0,1F2.1,2F3.0, F4.0, and F4.1, dated October 2,2004, and prepared by Nowak-t-Wiseman. The plans have incorporated design recommendations that we bave provided in our report and subsequent addenda. If you have any questions regarding mis letter, please contact us. Sincerely, URS CORPORATION Principal GeoteohniBaf Engineer LDH:afs cc: Lairy Reeves-Reeves Associates Architects Jim Wiseman- Nowak+Wiseman URS Corporation 1618 Murrty Canyon Road Suite 1000 San Diego, CA 92106 -Tel: 619^94.9400 Fox: 619^93.7920 zoo® HVHDIH v oavHDia J9i6 929 IVd URS REPORT GEOTECHNICAL INVESTIGATION PROPOSED PALOMAR AIRPORT REDEVELOPMENT MCCLELLAN-PALOMAR AIRPORT CARLSBAD, CALIFORNIA PREPARED FOR: PALOMAR AIRPORT CENTER URS PROJECT NO. 27662028.04000 FEBRUARY 11, 2004 URS April 20,2004 Mr, Richard Sax, Esq. c/o Mr. Joe Pate Palomar Airport Center LLC 2192 Palomar Airpon Road, Second Floor Carlsbad, CA 92008 Subject:Addendum No. 110 Geotechnical Investigation Proposed Palomar Airport Redevelopment McClellan-Palomar Airport Carlsbad, California URS Project No. 27662028.04000 Dear Mr. Pate: This addendum provides recommendations regarding the design of concrete floor slabs and pavements for the subject project. URS Corporation (URS) previously performed geotechnical investigations for the site. The results of the geotechnical investigations are presented in our report titled "Geotechnical Investigation, Proposed Palomar Airport Redevelopment, McClellan-Palomar Airport, Carlsbad, California," dated February 11,2004. The project structural engineer, Nowak Wiseman, has requested a modulus of subgrade reaction for use in design of rigid floor slabs and pavements. The shallow subgrade soils encountered below the project site consist of sandy clays and clayey sands. These materials will be scarified and recompacted. or where needed, additional fill soils will be imported. Recommendations for the characteristics of imported fills were provided in Section 4.3.3 of our report. The slabs and pavements should be designed for the condition of the recompacted clays. A subgrade modulus of 150 pounds per square inch/inch may be used for design of the floor slabs and rigid pavements. If you have any questions regarding this letter, please contact us. Please bind this addendum with the February 11,2004 report. Sincerely, URS CORPORATION LeoD. Handfelt, R^TE. 373 Principal Geotechnical Engineer LDH:afs cc: Jim Wiseman, Nowak Wiseman URS Corporation 1615 Murray Canyon Road Suite 1000 San Diego, CA 92108 Tel: 619.294.9400 Fax: 619.293.7920 REPORT GEOTECHNICAL INVESTIGATION PROPOSED PALOMAR AIRPORT REDEVELOPMENT MCCLELLAN-PALOMAR AIRPORT CARLSBAD, CALIFORNIA Prepared for Palomar Airport Center 2192 Palomar Airport Road Second Floor Carlsbad, CA 92008-4814 URS Project No. 27662028,04000 February 11,2004 URS 1615 Murray Canyon Road, Suite 1000 San Diego, CA 92108-4314 619.294.9400 Fax: 619.293.7920 URS February 11,2004 Mr. Richard Sax, Esq. c/o Mr. Joe Pate Palomar Airport Center LLC 2192 Palomar Airport Road, Second Floor Carlsbad, CA 92008 Subject: Geotechnical Investigation Proposed Palomar Airport Redevelopment McClellan-Palomar Airport Carlsbad, California URS Project No. 27662028.04000 Dear Mr. Pate: URS Corporation (URS) is pleased to submit the following report presenting the results of our geotechnical investigation for the additional delineation of the extent of a former landfill near the proposed redevelopment area at the McClellan-Palomar Airport in Carlsbad, California. This investigation was performed in accordance with our proposal dated December 5,2003. URS has performed a number of investigations to delineate the landfill and support design of the redevelopment. Initially, it had been planned that part of the redevelopment would be within the former landfill. It is now planned that no structures will be within the former landfill. This report compiles the results of the previous investigations that support the delineation of the landfill and presents recommendation for earthwork and foundation design appropriate for the currently planned redevelopment. The recommendations in this report supercede those provided in our previous reports, and may be used for final design of the redevelopment. We are pleased to be of continued service to the Palomar Airport Center. If you have any questions, please call us at 619-294-9400. Sincerely, ION Leo D. Handfelt, Q Principal Engine LDH/JLW:afs Robert K. Scott, R. Principal Geologist URS Corporation 1615 Murray Canyon Road Suite 1000 San Diego, CA 92108 Tel: 619.294.9400 Fax; 619.293.7920 W:\27662026\04000-a-r.doc\11-Feti-04\SDG TABLE OF CONTENTS Section 1 Introduction 1-1 1.1 Project Description 1-1 1.2 Previous Investigations 1-1 1.3 Purpose and Scope of current Investigation 1-2 Section 2 Field Investigation and Laboratory Testing 2-1 2.1 Field Explorations 2-1 2.2 Geotechnical Laboratory Testing 2-1 2.3 Analytical Laboratory Testing 2-2 Section 3 Site Conditions 3-1 3.1 Geologic and Seismic Setting 3-1 3.1.1 Geologic Setting 3-1 3.1.2 Seismic Setting 3-1 3.2 Surface Conditions 3-1 3.3 Subsurface Conditions 3-2 3.3.1 Fill 3-2 3.3.2 Santiago Formation 3-2 3.3.3 Groundwater 3-3 Section 4 Discussions, Conclusions, and Recommendations 4-1 4.1 Geologic and Seismic Hazards 4-1 4.1.1 Fault Rupture 4-1 4.1.2 Strong Ground Motions 4-1 4.1.3 Seismic Coefficient 4-1 4.1.4 Landslides 4-2 4.1.5 Landfill 4-2 4.1.6 Other Hazards , 4-2 4.2 Landfill Boundaries 4-2 4.3 Site Earthwork 4-3 4.3.1 Soil Characteristics 4-4 4.3.2 Site Preparation 4-4 4.3.3 Fill and Backfill 4-4 4.3.4 Subgrade Preparation 4-5 4.3.5 Temporary Excavations 4-5 4.4 Surface Drainage 4-6 4.5 Foundations 4-6 4.6 Slabs-on-Grade 4-7 4.7 Pavements 4-7 4.8 Corrosion Potential 4-8 4.9 Landfill Material Management and Gas Monitoring 4-8 4.10 Landfill Gas Control 4-10 W:\27662028\04000-a-r. doc\11 -Feb-04\SDG TABLE OF CONTENTS Section 5 Uncertainty and Limitations 5-1 Section 6 References 6-1 W \27662028\04000-a-r.doc\11-Feb-04\SDG LIST OF FIGURES AND APPENDICES Figures Figure 1 Vicinity Map Figure 2 Site Plan Figure 3 Regional Fault and Epicenter Map Appendices Appendix A Previous Explorations Appendix B Previous Geophysical Survey Appendix C Current Investigation Appendix D Geotechnical Laboratory Testing Appendix E Analytical Laboratory Testing W:\27662028\04000-a-r.doc\11-Feb-04\SDG SECTIONONE Introduction SECTION 1 INTRODUCTION This report presents the results of URS Corporation's (URS) current geotechnical investigation for the proposed Palomar Airport Center (PAC) redevelopment at McClellan-Palomar Airport. The project site is at the northwest intersection of Palomar Airport Road and El Camino Real. The location of the site is shown on the Vicinity Map, Figure I. URS has performed a number of previous subsurface explorations for the redevelopment. Initially, it had been planned that part of the redevelopment would be within a former landfill. It is now planned that no structures will be within the former landfill. This report compiles the results of the previous investigations that support the delineation of the landfill and presents recommendation for earthwork and foundation design appropriate for the currently planned redevelopment. The recommendations in this report supercede those provided in our previous reports, and may be used for final design of the redevelopment. 1.1 PROJECT DESCRIPTION PAC will be redeveloping the "Burrows Leasehold" at the airport with new hangar buildings. The redevelopment, including currently proposed structures and existing structures, is presented on the Site Plan, Figure 2. The current design includes two structures (Buildings I and 2) with a total of 19 hangars and office space. Building 1 will have overall dimensions of about 670 feet by 165 feet with a total of 34 hangars. A porte-cochere will separate Building 1 into a west and east part of the building. Building 2 will be L-shaped and located to the south and east of Building 1. Building 2 will have overall dimensions of about 315 feet by 125 feet with a total of 5 hangars. We understand that the hangar floors will consist of slabs on grade and the buildings will be lightly loaded steel-framed structures. Up to 3 feet of fill may be required to bring the site to finished grades. Portions of the airport are located above a former landfill operated by the County of San Diego. Former Landfill Cell No. 1A occupies the southern portion of the Burrows leasehold. The current design has sited all of the structures outside of the limits of the former landfill as delineated by this and previous investigations. The porte-cochere may extend into the limits of the former landfill but will consist of a cantilevered structure with no foundation support located within the area of the former landfill. 1.2 PREVIOUS INVESTIGATIONS A number of subsurface explorations have been performed at the site by various entities. Information from these previous explorations was evaluated and the data incorporated into this investigation. Copies of boring logs of the previous explorations are presented in Appendix A of this report. The approximate locations of these explorations are presented on Figure 2. Boring logs prepared by the County of San Diego, Department of Public Works (DPW; 1993, 1994, 1999) and Metcalf & Eddy (1992) were reviewed and incorporated in the delineation of the former landfill. W:\27662028\04000-a-r.doc\1 1 -Feb-04\SDG 1 - 1 SECTIONONE Introduction URS completed a geotechnical investigation in 2002 to provide design recommendations and delineate the former landfill (URS, 2002a). A geophysical survey was performed as part of that investigation to help delineate the northern limits of Landfill Unit 1A. GeoVision of Corona, California conducted this survey. A copy of their report, presenting its findings and conclusions, is presented in Appendix B. Further investigation was completed in 2002 to more accurately delineate the limits of the former landfill and characterize the composition of the landfilled materials (URS, 2002b). The volume of landfilled materials was estimated from that investigation to evaluate the option of clean closure of the landfill unit. URS conducted additional delineation near the northeast corner of the former landfill (URS, 2003). That investigation was focused on the area that would be occupied by the porte-cochere. Subsequent to that investigation, it was decided to shorten the planned porte-cochere and make it a cantilevered structure such that no foundation support would be required within the limits of the former landfill. 1.3 PURPOSE AND SCOPE OF CURRENT INVESTIGATION The purpose of the current investigation was to verify the limits of Landfill Unit 1A where proposed structures were very near the limits as had been interpolated between previous explorations. Our scope of services included a review of previous investigations, field explorations, laboratory testing, and engineering evaluations and analyses. This report presents the findings of the current investigation is intended to supercede the previous reports, and provides only the recommendations relevant to the currently proposed earthwork and foundations. All of the borings logs and test data from previous investigations have been included in this report for completeness. This report specifically presents discussions, conclusions and/or geotechnical recommendations regarding the following: • Geologic and seismic setting. • Delineation of former Landfill Unit 1 A. • Site surface and subsurface conditions. • Ground water conditions within the depths of the field explorations. • Potential geologic and seismic hazards. • Unified Building Code (UBC) seismic coefficients. • Site earthwork, including subgrade preparation. • Appropriate foundation systems for the planned structures. • Allowable bearing pressures and available lateral resistance for foundations. • Estimated total and differential foundation settlements. • Design of slabs-on-grade. W:\27662028\04000-a-r.doc\11-Feb-04\SDG 1 ~2 SECTIONQNE Introduction • Flexible pavement design sections according to Federal Aviation Administration (FAA) Advisory Circular 150/5320-6D. • Corrosion potential of near surface soils. • Control of potential landfill gases. • Management of landfill materials in the event that these materials are encountered during construction. This report was prepared by URS exclusively for PAC and its consultants for use in project design. UMC3* W:\27662028\04000-a-r docVH-Feb-04\SDG 1 -3 SECTIOMTWO Held Investigation and Laboratory Testing SECTION 2 FIELD INVESTIGATION AND LABORATORY TESTING The geotechnical investigation consisted of a review of previous investigations for the site and performing additional subsurface explorations along the north and east sides of the former Landfill Unit 1 A. Limited geotechnical laboratory testing was performed as part of the current investigation. As requested by the California Regional Water Quality Control Board (CRWQCB), analytical laboratory testing was performed on selected samples of the soil cuttings from the borings to determine their classification for proper disposal. 2.1 FIELD EXPLORATIONS A total of 17 borings were advanced for the current investigation. Eleven small-diameter auger borings were performed on January 29, 2004 using a truck-mounted hollow-stem auger drill rig. These auger borings were numbered to be consecutive with the previous borings and were designated Borings LB-50 through LB-56, LB-62, and LB-70 through LB-72. Six soil probe borings were performed on February 2, 2004 using a direct push rig. The direct push rig was utilized in areas with overhead access limitations, such as utility lines or inside hangars. The soil-probe borings were designated Borings LB-57 through LB-61, and LB-63. Planned Borings LB-64 through LB-69 were not drilled as landfill materials were not encountered in the adjacent borings. The borings were advanced to depths of between 2 and 14 feet. An engineer from URS logged the borings, and the soil encountered was classified in general accordance with the Unified Soil Classification System. Drive or push samples were collected in each boring to confirm soil types observed in the drilled cuttings using correlations between material type and sampler resistance. Selected soil samples were subsequently returned to our geotechnical laboratory and an analytical laboratory for further testing. Field personnel monitored for the presence of methane and other volatile organic compounds (VOCs) using a Photoionization Detector (PID) and a combustible gas indicator to monitor the Lower Explosive Limit (LEL). The existing pavement section was patched upon completion of the borings (asphalt cold patch or concrete as needed). A Key to the Log of Borings is presented in Appendix C as Figure C-l, and the logs of the recent borings are presented as Figures C-2 through C-l 8. Additional details of our field exploration program are presented in Appendix C. The approximate locations of the current field explorations are shown on Figure 2. 2.2 GEOTECHNICAL LABORATORY TESTING The materials encountered in the field explorations were visually classified and evaluated with respect to strength, swelling potential, compressibility, density, and moisture content. Expansion index tests were performed to evaluate the suitability of the materials for reuse as fill and for foundation support. Results of the geotechnical laboratory tests are shown at the corresponding sample locations on the boring logs (Appendices A and C) and in Appendix D. The geotechnical laboratory testing program is further discussed in Appendix D. W:\27662028\04000-a-r.doc\11 -Feb-04\SDG 2-1 SECTIONTWO Field Investigation and laboratory Testing 2.3 ANALYTICAL LABORATORY TESTING Cuttings from the borings were collected in five 55-galIon drums. Two composite samples were collected from the soil cuttings and sent to an analytical laboratory for classification as hazardous or non-hazardous materials. The analytical tests performed included EPA Test Method 8260B for Volatile Organic Compounds (VOCs) and EPA Test Method Series 6000/7000 for metals. The soil samples were determined to be non-hazardous and the drums will be removed from the site for proper disposal at an active landfill in the neav future. Results of the analytical laboratory tests are presented in Appendix E. W:\27662028\04000-a-r doc\11 -Feb-04\SDG 2-2 SECTIONTHREE Site Conditions SECTION 3 SITE CONDITIONS Our knowledge of the site conditions has been developed from a review of the area geology and seismicity, historical information, site reconnaissance, and the results of explorations and laboratory testing for the previous and current field investigations. 3.1 GEOLOGIC AND SEISMIC SETTING 3.1.1 Geologic Setting The subject property is within the coastal plain of the Peninsular Ranges physiographic province of California. The coastal plain is underlain by Eocene- and Cretaceous-age marine and nonmarine sedimentary strata, which nonconformably overlie crystalline granitic basement rocks or metavolcanic rocks of Cretaceous and Jurassic age. Fluctuation in sea level over geologic time has resulted in the down-cutting of alluvial channels and subsequent terrace formation, as well as channel backfilling. Generally north-south-trending secondary drainages intersect Agua Hedionda and Canyon de las Encinas. The area is characteristically underlain by the erosional remnants of Tertiary and Quaternary sedimentary deposits that form the coastal foothills. The geologic units encountered in the site explorations are described in Section 3.3. 3.1.2 Seismic Setting The tectonic setting of the San Diego area is influenced by plate boundary interaction between the Pacific and North American lithospheric plates. This crustal interaction occurs along a broad belt of northwest-trending, predominately right-slip faults that span the width of the Peninsular Ranges and extend into the offshore Intercontinental Borderland province. The major southern California fault systems include the San Andreas, San Jacinto, Imperial, and Elsinore fault zones to the east and north; the San Clemente, Coronado Bank, and Rose Canyon fault zones to the west; and the Agua Blanca and San Miguel fault zones to the south. The Rose Cany on-Newport Inglewood fault zone (RCNIFZ) is the closest major active fault to the proposed project area and dominates the seismic exposure of coastal San Diego. The primary faults comprising the RCNIFZ extend on land from La Jolla and continue south along the east margin of Mission Bay to the Old Town area west of the site; the RCNIFZ then continues to the south toward downtown San Diego and San Diego Bay. The RCNIFZ extends offshore north of La Jolla and is approximately 6 miles (10 kilometers) west of the project site. Figure 3 presents a regional fault and epicenter map. 3.2 SURFACE CONDITIONS El Camino Real and Palomar Airport Road bound the airport on the east and south, respectively. At the eastern and southern airport boundaries, approximately 5- to 35-foot-high slopes descend toward these roadways. The slopes are covered with small shrubs and low-height vegetation. The Burrows leasehold is west of the main entrance to the airport and consists of a northern and southern section on either side of Aircraft Road. The proposed hangars for the redevelopment will be located north of Aircraft Road. W:\27662028\04000-a-r.doc\11 -Feb-04\SDG 3 - 1 SECTIONTHREE _ Site Conditions Existing one- and two-story hangar buildings and a restaurant currently occupy the northern leasehold. A fuel farm exists adjacent to the runway at the northern end of the northern leasehold. The areas between existing structures are completely covered with concrete or asphalt pavements. On-grade aircraft parking occupies the southern end of the northern leasehold. The southern leasehold is occupied by port-a-ports and on-grade aircraft parking. Most of the area proposed for the redevelopment is relatively level, covered with asphalt and concrete, and slopes gently to the west. The elevation of the ground surface in the area of the current field explorations ranges from approximately 3 1 5 to 320 feet Mean Sea Level (MSL). 3.3 SUBSURFACE CONDITIONS The site is underlain by fill material, landfill material, and formational soil. Fill material at the site is composed of soil fill over most of the northern leasehold. Fill within the limits of Landfill Unit 1A consist of cover soil overlying landfilled materials. The formational soils encountered at depth are Tertiary-age sedimentary deposits of the Santiago Formation. 3.3.1 Fill Soil fill at the site typically consists of yellowish brown silty clay with sand. The soil fill was typically encountered to depths of up to 5 feet outside of the Landfill Unit 1A limits, except for an area immediately northeast of the former landfill. In that area, the fill soils were encountered to depths of up to 1 1 feet and were typically described as loose silty clay. It is suspected that these fill soils were placed in former drainages adjacent to the landfilled area. The area of deeper fill soils that will need to be removed and replaced with compacted fills is delineated on Figure 2. Within the limits of Landfill Unit 1A, the cover soil ranged in thickness from 2 to 9 feet and consists of silty clay with sand. The underlying landfilled materials consists of silty clay with sand, gravel, and trash. The trash material is highly varied and includes organic matter, plastic, fabric, wood, and metal. It appears that the landfill material consists of both construction debris and municipal solid waste. 3.3.2 Santiago Formation Based on published geologic maps for the subject area, the site is underlain by Eocene-age marine and nonmarine sedimentary deposits assigned to the Santiago Formation, which is composed of interbedded sandstone, siltstone, and lesser claystone. The Santiago Formation is depositionally in time equivalent with the La Jolla Group sediments, which include the Torrey Sandstone and Del Mar Formation near the study area (Kennedy, 1975). The strata are generally referred to as Santiago Formation north of Carlsbad and Del Mar Formation and Torrey Sandstone to the south. The subject area has been mapped as undifferentiated Del Mar Formation, Torrey Sandstone, and lowermost Santiago Formation (Weber, 1982). The Santiago Formation encountered in the borings at the site typically consists of light gray to light brown silty fine sandstone and sandy siltstone. Sampler blowcounts in the upper weathered portion of this unit are in excess of 30 blows per foot (bpf). Below the upper few feet of weathered material, sampler blowcounts are in excess of 50 bpf. W:\27662028\04000-a-r.doc\1 1-Feb-Q4\SDG 3 ~2 SECTIONTHREE Site Conditions 3.3.3 Groundwater According to the "Comprehensive Water Quality Control Plan for the San Diego Basin" prepared by the Regional Water Quality Control Board, San Diego Region (RWQCB, 1975) and the draft document updating existing and beneficial uses for the San Diego Hydrologic Basin (1990), the subject property lies within the Carlsbad Hydrographic Subunit, Encinas Hydrographic Subunit. Groundwater in the Encinas Hydrographic Subunit is designated as having no existing beneficial uses. According to the California Department of Water Resources (DWR, 1967), depth to groundwater in this hydrologic area was reported to range from less than 25 feet in Canyon de las Encinas up to 75 feet in the site vicinity. Groundwater was not encountered in the explorations performed for the current or previous investigations within the area of the planned developments. Based on the geologic setting of the site, it is anticipated that the regional groundwater surface is at a depth below the anticipated grading for the site. A shallower perched water table may be present in the area seasonally. Seepage may be encountered during site grading, but substantial amounts of water are not anticipated. W. \27662028\04000-a-r.doc\11 -Feb-04\SDG 3 -3 SECTIOHFOUR Discussions, Conclusions, and Recommendations Parameter Soil Profile Seismic Zone Zone Factor, Z Seismic Source Name Seismic Source Type Distance to Seismic Source Near Source Factor, Na Near Source Factor, Nv Seismic Coefficient Ca Seismic Coefficient Cv Value Sc 4 0.4 Rose Canyon Fault B 10km 1.0 1.0 0.40 0.56 1 997 UBC Reference Table 16-J Figure 16-2 Table 16-1 Figure 0-37* Table 16-U Figure 0-36* Table 16-S Table 16-T Table 16-Q Table 16-R * Figure 0-36 of ICBO, 1998 4.1.4 Landslides The project site is relatively flat. No evidence of landslides was observed within the leasehold boundary during the field investigations. No ancient landslides were observed in the site area based on interpretation of historic stereographic aerial photographs. 4.1.5 Landfill It is recommended that permanent structures not be located within the limits of the existing landfill units. The revised boundary of Landfill Unit 1A, based on the previous and current site investigations, is presented on Figure 2 along with the currently proposed redevelopment footprint. A discussion of the delineation of these limits is provided in Section 4.2. The latest delineation of the landfill indicates that the planned structures are outside of the landfill limits. 4.1.6 Other Hazards Other hazards that potentially affect project sites in San Diego include liquefaction, floods, tsunamis, and seiches. Based on the physiographic setting, distance to the ocean, and elevation of this site, it is our opinion that the potential for flooding, tsunamis, or seiches is very low. Similarly, the absence of saturated loose granular materials underlying the site area suggests that the potential for seismically induced liquefaction at the site is low. 4.2 LANDFILL BOUNDARIES The limits of Landfill Unit 1A was originally delineated based on observation of surficial settlements at the site. These estimated limits were provided to URS, and were modified in 2002 based on the results of additional borings along the north perimeter of the landfill unit (URS, 2002b) and geophysical traverses performed along the northern boundary of the landfill unit (URS, 2002a). The limits were delineated by interpolating between borings that had encountered landfilled materials and those that had not, and interpretation of the geophysical data. Additional borings were undertaken in the northeastern corner of URS W^7662028\04000-a-r.doc\11-Feb-04\SDG 4-2 SECTIONFOUR Discussions, Conclusions, and Recommendations the Landfill Unit 1A to more accurately identify the boundary specific to proposed structures in this area (URS, 2003). The current investigation was conducted to verify the limits of the landfill where proposed structures were very near the limits as had been interpolated between widely spaced previous explorations. No landfilled materials were encountered in the current explorations, and the landfill boundary was not modified in those areas. The previous and current borings along the perimeter of the former landfill cell were more accurately located using a portable Global Positioning Systems (GPS) unit during the current investigation. The pavement patch for the previous borings is still visible. This revised some of the boring locations slightly. The limit of Landfill Unit 1A has been modified slightly based on a review of the previous investigations and findings from the current investigation (Borings LB-50 through LB-72). The revised limit of Landfill Unit 1A is presented on Figure 2. The revised limits still do not encroach on proposed building locations. 4.3 SITE EARTHWORK Grading for the proposed project will consist primarily of removal of existing asphalt pavements, proof- rolling of shallow fill areas, removal and recompaction of deeper fills, placement of additional fills to final grades, and fine grading for site drainage control. Additional earthwork activities will include foundation excavations, utility trench excavations and backfilling, and preparation of subgrades for building floor slabs, hardscape, taxiways, and traffic areas. Import or export of fill may be required if the cut and fill volumes do not balance. It is recommended that a pre-grading conference be held at the site with the owner, contractor, civil engineer, and geotechnical engineer. Special earthwork requirements should be discussed at that time. The proposed development will be constructed within 1,000 feet of the inactive Landfill Unit 1A. As such, relevant requirements of Title 27 of the California Code of Regulations and California Regional Water Control Board (RWQCB) Order No. 96-13, "Waste Discharge Requirements for Post-closure Maintenance for County of San Diego Palomar Airport Sanitary Landfill" must be addressed. Title 27 describes the requirements for post-closure land uses for construction on top, of or within 1,000 feet, of a landfill. It requires that post-closure land uses be designed and maintained to: • Protect public health and safety and prevent damage to structures, roads, utilities, and gas monitoring and control systems. • Prevent public contact with waste, landfill gas, and leachate. • Prevent landfill gas explosions. A Post-closure Land Use Plan should be prepared and provided to the regulatory agencies for the redevelopment to describe relevant site conditions, identify potential interaction between the proposed development and the adjacent landfill, and present design criteria to satisfy the requirements of Section 22190 of Title 27. The plan should also include Construction Health and Safety Guidelines, a Community Health and Safety Plan, and a Post-construction Maintenance Program. W:\27662028\04000-a-r.doc\11-Feb-04\SDG 4-3 SECTIONFOUR Discussions, Conclusions, and Recommendations 4.3.1 Soil Characteristics Results of the current and previous investigations indicate that the near-surface fill and formational soil within the proposed building areas primarily consists of silty clay with sand, and silty to clayey sand. Most of these soils may be classified as low to moderately expansive. These soils generally correlate to materials with an Expansion Index of 90 or less when tested in accordance with UBC Standard 18-2 or with plasticity index values of 30 or less. Once compacted and covered with pavement, the potential for expansion will be low due to the absence of infiltrating irrigation water or precipitation. It is our opinion that the fill and formational soil can be excavated with moderate-to-heavy effort with conventional heavy-duty excavating equipment. These materials are generally suitable for reuse when recompacted; however, highly expansive soil (Expansion Index, of 90 or greater, or a Plasticity Index of 30 or greater), if encountered, should be placed below a depth of 3 feet. Additional recommendations are provided in Section 4.3.2 (Site Preparation). 4.3.2 Site Preparation Several hangars, a restaurant, aviation repair facilities, and miscellaneous other aviation support facilities currently occupy the site. These structures will be demolished and removed, including the existing paved areas, before construction of the proposed structures and hardscape. Stockpiles of soil, or other debris and rubble from demolition be removed and properly disposed of offsite. Abandoned underground utilities (if any) should either be excavated and properly backfilled, or filled with a sand-cement slurry. Fill soils encountered in the northern portion of the leasehold are generally shallow, typically 2 to 3 feet deep. In areas of proposed fills, these fill soils should be proofrolled using rubber tired loader or other heavy equipment, after demolition and prior to placing additional fills, to locate any soft or loose zones. Soft or loose areas identified by proofrolling should be compacted in place, or removed and recompacted. The soils should be recompacted to a minimum of 90 percent relative compaction. Relative compaction is defined as the ratio (expressed in percent) of the in-place dry density of the compacted fill divided by the maximum dry density determined in accordance with ASTM D1557. In areas of proposed cuts, the subgrade should be prepared as recommended in Section 4.3.4. Deeper areas of loose, undocumented fill were encountered in the explorations adjacent to the Landfill Unit 1A. These deeper fills should be removed and recompacted to assure adequate support for the structures in those areas. The approximate limits of the deeper fill are indicated on Figure 2. The deeper fills should be removed to a lateral distance of at least 10 feet beyond the edge of the proposed building and down to the top of the Santiago Formation. The removal should be observed by an engineering geologist to ensure that formation material has been encountered in the overexcavation. The fill materials should generally be suitable for reuse as compacted fills. The fill should be recompacted in accordance with the recommendations presented in Section 4.3.3. It is estimated that approximately 9,000 cubic yards (cy) of deeper fills may need to be removed and recompacted in this area. 4.3.3 Fill and Backfill Materials used for compacted fill and backfill should contain no rocks or hard lumps greater than 6 inches in maximum dimension and should contain at least 40% of material (by dry weight) smaller than W:\27662028\04000-a-r doc\11 -Feb-04\SDG 4-4 SECTIONFOUR Discussions, Conclusions, and Recommendations one-quarter-inch in size. Material of a perishable, spongy, or otherwise compressible nature should not be used in fill. Fill and formational soil encountered in the site explorations would generally be suitable for reuse as fill materials. The geotechnical engineer should approve any import materials before they are transported to the site. It is recommended that fill materials in the upper 1 foot of finish grade in the building and hardscape areas be composed of select material. Select material may be defined as containing no rocks or hard lumps greater than 6 inches in diameter, having at least 40% material less than one-quarter-inch in size and an expansion index of less than 90 (UBC Standard 18-2), and contain no perishable, spongy, deleterious, or otherwise unsuitable material. Fill and backfill material should be placed in layers that, when compacted, should not exceed 6 inches. Each layer should be spread evenly and thoroughly mixed during the spreading to obtain uniformity of moisture and material in each layer. After each layer has been placed, mixed, and spread evenly, it should be uniformly compacted to a relative compaction that is indicated by test to be not less than 90%. Fills and backfills within 1 foot of finished grade should be compacted to a minimum of 95% relative compaction. Fill and backfill materials should be compacted above the optimum moisture content, as determined by the above test method. 4.3.4 Subgrade Preparation We recommend that the building and pavement areas be underlain by at least 12 inches of select, granular materials as defined in Section 4.3.3. We anticipate that most existing near-surface materials will meet this requirement. It is recommended that the upper 12 inches of subgrade below slabs-on-grade and pavements be compacted to 95% relative compaction. Cut areas should be scarified and then recompacted to a minimum of 95% relative compaction. 4.3.5 Temporary Excavations It is recommended that temporary construction slopes be no greater than 10 feet high and cut back at an inclination no steeper than 1:1 (horizontal to vertical) in formational materials and no steeper than 114:1 in fill materials. It is not anticipated that groundwater dewatering would be required for the excavations; however, water from seeps may require localized sumps. Temporary construction slopes, as described above, are considered to have a factor of safety against deep-seated failure in excess of 1.2 for static conditions. A qualified engineering geologist or engineer should be present to verify soil conditions. Excavations not properly shored or benched may become unstable and cause damage to adjacent improvements. All temporary construction slopes, including trenches for buried pipes and other utilities, should comply with local, Cal-OSHA, and all other applicable safety ordinances. The tops of all excavations should be graded to prevent runoff from entering the excavation. It should be recognized that the safety of all temporary construction slopes is the contractor's responsibility. The contractor should perform an independent assessment of the proposed temporary slope conditions and dewatering requirements. UJKS W:\27662Q28\04000-a-r.doc\11-Feb-04\SDG 4-5 SECTIONFOUR Discussions, Conclusions, and Recommendations 4.4 SURFACE DRAINAGE It is recommended that positive measures be taken to properly finish-grade the site so that drainage waters from the site are directed offsite and away from foundations. Even when these measures have been taken, experience has shown that a shallow groundwater or surface-water condition can and might develop in areas where no such water condition existed before site development. To further reduce the possibility of moisture-related problems, we recommend that landscaping and irrigation be kept as far from the proposed buildings as possible. Irrigation water should be kept to the minimum required level. Landscape planters adjacent to structures should be drained and lined. A minimum ground slope of two percent is suggested for unpaved areas and one percent for paved areas. 4.5 FOUNDATIONS It is recommended that proposed structures be directly underlain by formational soil or compacted select fill material. No structures should be located over the landfill areas, as delineated on Figure 2. The structures may be supported on conventional spread or continuous footings founded in the formational or compacted fill soils. Shallow spread and continuous wall footings can be designed using an allowable bearing pressure of 3,000 pounds per square foot (psf). Spread or continuous footings should be at least 18 inches deep and 18 inches wide. This bearing pressure may be increased by one-third for loads that include wind or seismic forces. All foundation excavations should be cleaned of loose material and the excavations should be observed by a qualified geotechnical engineer or engineering geologist before placing steel or concrete to verify soil conditions exposed at the bottoms of the excavations. We recommend that all foundation elements be reinforced top and bottom with reinforcing steel. The structural engineer should design the actual reinforcement. Resistance to lateral loads on the shallow foundations will be provided by passive resistance along the edge of the footing and frictional resistance along the bottom of the footings. For passive resistance, we recommend that an equivalent fluid weight of 380 pounds per cubic foot (pcf) be used for footings or grade beams poured neat against the excavation or properly backfilled. This value assumes a horizontal surface for the soil mass extending at least 10 feet from the face of the footing or three times the height of the surface generating passive resistance, whichever is greater. The upper 12 inches of material in areas not protected by floor slabs or pavement should not be included in design for passive resistance. If friction is to be used to resist lateral loads, a coefficient of friction of 0.4 between the soil and foundation concrete can be used. If it is desired to combine frictional and passive resistance in design, we recommend using a friction coefficient of 0.3. It is estimated that the proposed building structures founded on fill or formational soil, designed as recommended above, may undergo total settlements on the order of one-half inch. Differential settlements are estimated to be approximately one-half that amount. W:\27662028\04000-a-r doc\1 1 -Feb-04\SDG 4-6 SECTIONFOUR Discussions, Conclusions, and Recommendations 4.6 SLABS-ON-GRADE The actual loading conditions for the proposed building floors are unknown; however, it is recommended that concrete slab-on-grade floors be at least 5 inches thick for office-type loading and 7 inches thick for heavy aircraft parking and storage. Slab-on-grade floors should be reinforced near mid-depth with steel reinforcing bars. It is recommended that the slab thickness and reinforcement be properly designed by the structural engineer for the anticipated floor loads and other structural considerations. Concrete slabs should be provided with control joints at regular intervals not exceeding approximately 15 feet each way. It is recommended that a minimum 4-inch underlay of clean, coarse sand underlie concrete slabs-on- grade. A suitable vapor barrier membrane with a 2-inch protective sand cover should be placed over the coarse sand if moisture-sensitive floor coverings (such as carpeting or tiles) are used. The protective sand cover can be part of the 4-inch underlay. 4.7 PAVEMENTS It is anticipated that the paved portions of the site will consist of asphalt concrete (AC) paving for taxiways and aircraft parking and Portland cement concrete (PCC) paving for heavily loaded areas. Laboratory test results indicate that the subgrade soil has resistance values or R-values less than 5. This R-value represents a California Bearing Ratio (CBR) of less than 5. CBR parameters are used to develop the structural pavement sections according to FAA Advisory Circular 150/5320-6D. it is recommended that additional R-value or CBR tests be performed on samples of the actual subgrade soil when the final site grading is completed. Several different pavement sections may be used for the different anticipated loading conditions within the leasehold. We understand that different areas within the leasehold will have loading from three classes of aircraft for taxiways, light aircraft parking, and car and truck parking and driveways. We recommend that the pavement sections for the various loading conditions consist of the thicknesses indicated below: Loading Condition Global Express aircraft Gulfstream G V Falcon Light aircraft, cars, and trucks Asphalt Concrete (inches) 4 4 4 4 Base (inches) 8 9 9 6 Subbase (inches) 15 6 7 - The recommended pavement sections should be placed over properly prepared subgrade consisting of at least 12 inches of soil compacted to a minimum relative compaction of 95%. AC mix design should conform to Item P-401 of the FAA Advisory Circular specifications. Aggregate base should conform to Item P-209 of the FAA Advisory Circular specifications be placed at a minimum relative compaction of 95%. The subbase material should have a minimum CBR value of 20 and be compacted to a minimum relative compaction of 95%. A GP or GW material or the base material, indicated above, may be used as subbase. To reduce or eliminate the subbase need, geosynthetic URS W:\2766202S\04000-a-r doc\11-Feb-04\SDG 4-7 SECTIONFOUR Discussions, Conclusions, and Recommendations reinforcement may be used to improve the subgrade. This option may reduce the grading cost for the project. It is recommended that PCC pavements in areas where dumpsters will be stored and picked up or in areas of anticipated heavy-truck traffic. Our experience indicates that heavy-truck traffic can shorten the useful life of AC sections. We recommend that in these areas, 7 inches of Class 2 PCC (per Caltrans Standard Specifications, Section 90) be used over the prepared select subgrade surface. It is recommended that concrete pavements be provided with expansion joints at regular intervals (not exceeding approximately every 15 feet each way). PCC should conform to Sections 40 and 90 of the Standard Specifications. It is recommended that an engineering company specializing in these types of work make mix designs for AC and PCC and that the paving operations be inspected by a qualified testing laboratory. It is recommended that adequate surface drainage be provided to reduce ponding and possible infiltration of water into the base and subgrade materials. Paved areas should have a minimum gradient of one percent. It is important to provide adequate drainage to reduce possible future ponding and distress of the pavement section. As much as possible, planter areas next to pavements should be avoided; otherwise, subdrains should be used to drain the planter to appropriate outlets. 4.8 CORROSION POTENTIAL The results of previous pH, resistivity, and water-soluble sulfate tests, as performed by M.J. Schiff & Associates, Inc., are presented in Appendix D. The tests were performed on a sample of material obtained from the following location and indicated depth. The test indicated the following results: Test PH Minimum Resistivity (ohm-cm) Water Soluble Sulfates (%) Chloride Content (%) GB-1 at a depth off to 4' 5.4 460 0.9595 0.0495 It has been our experience with local corrosion engineers that the resistivity results indicate very corrosive conditions to metallic utility piping and conduits. The results of these tests also indicate that sulfate attack to concrete may be considered severe. Table 19-A-4 of the 1997 UBC, Requirements for Concrete Exposed to Sulfate Containing Solutions, indicates that sulfate exposure from concentrations between 0.20 and 2.00% is considered severe. Type V cement with a water to cementitous materials ratio of less then 0.45 should be used for all concrete on grade. A minimum concrete strength (fc') of 4,500 pounds per square inch is required by Table 19-A-4. We recommend that a corrosion engineer be consulted for additional design information. 4.9 LANDFILL MATERIAL MANAGEMENT AND GAS MONITORING Based on current drawings, the proposed buildings will be located immediately adjacent to the former landfill. The findings of our geotechnical investigation have identified undocumented fills adjacent to the former landfill cell in the area to be occupied by new hangars. As such, earthwork will require the URS W:\27662G28\0400Oa-r.doc\11 -Feb-04\SDG 4-8 SECTIONFOUR Discussions, Conclusions, and Recommendations overexcavation of these materials to a depth of up to II feet immediately adjacent to the landfill. It is possible that landfill material (municipal solid waste) could be encountered in the area immediately adjacent to the boundary of the former landfill, since the temporary excavations will need side slopes. However, there is a low likelihood of encountering landfill materials, as borings just within the delineated landfill did not encounter waste materials. If landfilled materials are encountered during excavation, there is also the potential that landfill gas may also be present. The following describes the landfill waste management and landfill gas monitoring that will be necessary during the removal of the undocumented fill along the former landfill cell boundary. If landfill material (municipal solid waste) is encountered during the overexcavation of undocumented fills during construction, work should be temporarily suspended and the following agencies notified: • County of San Diego Department of Public Works, Inactive Landfills Group • San Diego Regional Water Quality Control Board (RWQCB) • County of San Diego, Local Enforcement Agency (LEA) • San Diego County Air Pollution Control District Upon approval to proceed, workers will be instructed to wear work gloves and rubber steel-toed boots, and the material will be placed in a secure (locked) roll-off bin provided by the contractor on the site strictly for the purpose of holding this material. Only those workers with current Hazardous Waste Operations and Emergency Response (HAZWOPER) training in accordance with Title 29 Code of Federal Regulations, Part 1910.120 requirements will be permitted to conduct excavation of landfill material in accordance with an approved Health and Safety Plan. Workers should not handle materials such as drums, chemical containers, medical waste, or any other material that may present the potential for exposure to health and safety hazards. If any symptoms such as nausea, dizziness, irritation to the eyes, nose, or throat, or other abnormal effects are noted, the activity should cease immediately. If encountered, such materials should be cordoned off and appropriate professionals consulted. Once all excavation activities in the project area are completed (e.g., there is no further likelihood of encountering landfill material), the material in the bin will be properly characterized and, based upon the characterization, transported off-site for proper disposal. Continuous air monitoring for methane and hydrogen sulfide should be conducted during excavation. Should gas concentrations be encountered at or above action levels as identified below, work should be temporarily suspended in the affected area until further evaluation is completed. As an added precaution, excavation equipment operators and other workers in the immediate vicinity of the excavation should place themselves up- or cross-wind of the excavation operation. Safe Zones should be established. If the contractor's Site Safety Officer observes one or more of the following conditions, work should temporarily cease, and all personnel shall leave the immediate work area in an upwind direction to an established Safe Zone when: 1) levels of methane greater than or equal W:\276G2028\04000-a-r.doc\11 -Feb-04\SDG 4-9 SECTIONFOUR Discussions, Conclusions, and Recommendations to 20 percent of the Lower Explosive Limits (LEL = 5%) and 2) hydrogen sulfide concentrations above two parts per million (ppm) for a period of five minutes. 4.10 LANDFILL GAS CONTROL The south side of the proposed redevelopment is in close proximity to Landfill Unit 1A. One of the byproducts of landfill gas produced by the decomposition of the organic wastes deposited in the landfill is methane gas. Methane can continue to be generated from old landfills for fifty years or more depending on site-specific conditions (quantity of organics placed, moisture content, etc.)- Due to the proximity of the landfill, there is the potential for explosive gases to accumulate under the proposed buildings. During the most recent subsurface investigation, the boreholes around the perimeter of the former landfill were monitored for methane concentrations, and are reported on the boring logs as a percent of the lower explosive limit (LEL) of methane, which is 5% by volume. Measurements were taken in the borehole, of the samples, and within the headspace of the boring for methane. No methane was found in any of the measurements taken, however, some slight reduction in oxygen concentrations were noted in 3 of the borings. This may indicate that some decomposition gases are being generated by the landfill and may be displacing the oxygen in the surrounding soil. Although the displacement was minor (oxygen concentrations were 19%; the ambient level is 21%), it indicates the possibility that methane gas could migrate beneath the proposed buildings. There are two factors that will limit the ability of methane gas to migrate from the landfill toward the proposed buildings. These include: 1) the sandy clay fill soils within the area of the proposed buildings and overlying the landfill and 2) the existing active landfill gas collection (LFG) system within Landfill Unit 1A operated by the County of San Diego, former operator of the landfill. The fill soils are relatively impervious to gas migration due to their fine-grained nature. The landfill gases that are generated within Landfill Unit 1A area are being extracted from the landfill by the existing LFG collection system. As long as this LFG collection system remains operational, the likelihood of methane migrating toward and under the proposed buildings is very low. If the LFG collection system were to become inoperable or ineffective within the Unit 1A area and landfill gases were to continue to be generated there, gas pressures would build within the landfilled waste. Since the Santiago Formation underlying the landfill is generally less permeable than the compacted fill soils above them, the landfill gas will migrate from the waste through the compacted fill until it can be released into the atmosphere. The confined gases would migrate along the path with the greatest permeability such as cracks or seams in the overlying asphalt or concrete pavements and/or floor slabs to the atomosphere. As a safeguard against collection of landfill gas beneath the buildings or in enclosed areas in the event that the LFG collection system, were ineffective or inoperable, it is recommended that the following be installed as part of the redevelopment construction: • Vertical landfill gas monitoring probes be placed between the proposed buildings and the landfill footprint, in the clean fill soils to the depth of the Santiago Formation (generally 6 to 15 feet). Depending on depth of the fill, each monitoring location may contain multi-level probes. The probes consist of PVC casing (1-inch diameter) screened over the lower S feet. The screens are placed across intervals where the fill or strata could be a migration pathway for landfill gas. It is W:\27662028\04000-a-r.doc\11-Feb-04\SDG 4-10 SECTIONFQUR Discussions, Conclusions, and Recommendations recommended that probes be installed at 5 locations along the southern extent of the proposed buildings in fill adjacent to the extent of the landfill cell. • Methane sensors be installed in enclosed spaces (especially in closets, offices, restrooms, etc.) within the proposed buildings. The locations of sensors will depend on the building layouts. • Methane sensor monitoring panels from which all of the sensors could be monitored and alarms, as appropriate, can be signaled. It is recommended that periodic monitoring and maintenance of the perimeter probes and the in-building monitoring system be performed. W:\27662028\04000-a-r.doc\11-Feb-04\SDG 4-1 1 SECTIONFIVE Uncertainty and Limitations SECTION 5 UNCERTAINTY AND LIMITATIONS We have observed only a very small portion of the pertinent subsurface conditions. The geotechnical recommendations made herein are based on the assumption that soil conditions do not deviate appreciably from those encountered in the field investigations. We recommend that URS review the foundation and grading plans to verify that the intent of the recommendations presented herein has been properly interpreted and incorporated into the contract documents. We further recommend that the site grading and earthwork, subgrade preparation under concrete slabs and paved areas, utility trench backfill, and foundation excavations be observed by a qualified engineer or geologist to verify that site conditions are as anticipated, or to provide revised recommendations if necessary. California, including San Diego County, is an area of high seismic risk. It is generally considered economically unfeasible to design structures to resist earthquake loadings without damage. Proposed structures designed in accordance with our recommendations could experience limited distress/damage if subject to strong earthquake shaking. Geotechnical engineering and the geologic sciences are characterized by uncertainty. Professional judgments presented herein are based partly on our understanding of the proposed construction and partly on our general experience. Our engineering work and judgments rendered meet current professional standards; we do not guarantee the performance of the project in any respect. W.\27662028\04000-a-r.doc\11-Feb-04\SDG SECTIONS IX References SECTION 6 REFERENCES California Department of Water Resources, 1967. Groundwater Occurrence and Quality, San Diego Region, Parts I and II. City of San Diego, Seismic Safety Study, 1995. Geologic Hazards and Faults, Development Services Department. DWR, 1967. Ground Water Occurrence and Quality: San Diego Region. Department of Water Resources, 1967. International Conference of Building Officials, 1998. Maps of Known Active Fault Near-Source Zones, California and Adjacent Portions of Nevada, prepared by California Department of Conservation, Division of Mines and Geology, February 1998. Kennedy, M.P., 1995. Geology of the San Diego Metropolitan Area, California Division of Mines and Geology, Bulletin 200. Regional Water Quality Control Board, San Diego Region, 1975. Comprehensive Water Quality Control Plan Report, 1975 (draft update, 1990). Rockwell, T.K. et al., 1991. "Minimum Holocene Slip Rate for the Rose Canyon Fault in San Diego, California," in Environmental Perils in the San Diego Region, P.L. Abbott and W.J. Elliott, eds., San Diego Association of Geologists, pp. 37-46. State of California Department of Transportation, 1999. Standard Specifications, July 1999. Uniform Building Code, 1997. Structural Engineering Design Provisions, vol. 2, by International Conference of Building Officials. URS Corporation, 2002a. Geotechnical Investigation, Proposed New Airfield Structures, McClellan-Palomar Airport, Carlsbad, California, April 19 (URS Project No. 58- 00111062.01.00000). URS Corporation, 2002b. Landfill Investigation, Landfill Unit No, I A, McClellan-Palomar Airport, Carlsbad, California, May 8 (URS Project No. 58-00111062.01.00000). URS Corporation, 2003. Additional Land/ill Delineation, Leasehold Improvements, Pahtuar Airport Center, Carlsbad, California, November 19 (URS Project No. 27662028.TASK1). URS Corporation, 2004. Revised Workplan for Additional Landfill Delineation, Proposed Palomar Airport Redevelopment. McClellan-Palomar Airport, Carlsbad, California, January 16,2004, (URS Project No. 27662028.01000). U.S. Department of Transportation, 1995. FAA Advisory Circular I50/5320-6D. Airport Pavement Design and Evaluation, July 7, 1995. W. \27662028\04000-a-r doc\11 -Feb-04\SDG 6-1 SECTIONS IX References Weber, F.H. Jr., 1982. Recent Slope Failures, Ancient Landslides and Related Geology of the North- Central Coastal Area, San Diego, California. W:\27662028\04000-a-r.doc\1 1 -Feb-04\SDG 6-2 Figures URS W:\27662028\04000-a-r.dOC\11-Feb-04\SDG 2 UJs 0.o UJ >UJ OUJ O OUJ00OQ- Oa:CL. APPENDIXA Previous Explorations URS W:\27662028UMOOO-a-r doc\11-Feb-04\SDG r- APPENDIKA Previous Explorations ,— A number of explorations have been performed in the vicinity of former Landfill Unit 1 A. Copies of the boring logs from the previous investigations are provided in this appendix. The locations of the explorations are shown on the Site Plan (Figure 2). The previous investigations include the following: »--• • One gas migration monitoring well (GW-2) by Metcalf and Eddy, 1992. • Eight 8-inch hollow-stem auger borings (B-I through B-8) by County of San Diego DPW, 1993. T— • Six 6-inch auger borings (B-l through B-6) by County of San Diego DPW, 1994. • Six 8-inch hollow-stem auger borings (B-l through B-6) by County of San Diego DPW, 1999. • Seventy-two 6-inch hollow-stem auger borings (GB-1 through GB-11, ffi-1 through IB-12, and LB-1 through LB-49) by URS, 2002a and 2002b. r~• Eleven 8-inch hollow-stem auger borings (B-l through B-l 1) by URS, 2003. r r* i, r URS W:\27662028\04000-a-r.c)oc\11-Feb-04\SDG APPENDIXA Previous Explorations County of San Diego DPW, 1993 URS W:\27662028\04000-a-r doc\11 -Feb-04\SDG COUNTY OF SAIM DIEGO DEPARTMENT OF PUBLIC WORKS MATERIALS LABORATORY LOG OF BORINGS ATTACHMENT SHT_l OF Proper No- Onli«r/A«:«3nt Tg.\ - i u ! ype ;; bizf. £jiuip. & Moc'gl Sampler I. P.. I M. Q^Q ^s' Hole No. Surface £lev. 3 I e 3 P. CO- e Locaticn .In. Calif. Coord. Datum ZACg.1 fO GHNO 0" *:AT=S:AL SVMSQLS. p-j^t PALO Mi AS Al Project N F d Eng Oriltir/As 0 '; Typ Eguip. & Depth •o A a I 0 V* 1 —> t n.2 — -r i-i a. U t?. ni>«- iVIcds! \b P TS & 5 -7 J ^= .\-c ll ^ \M — &>^ LoO^ ;tu>" COUNTY OF SAP DEPARTMENT OF PU MATERIALS LA3C LOG OF BO DM £/ =^T rv ottirv• Sampler I.D ATTACHMENT »°^ J DICGO SHT_Z^_OF 6 3LSC WORKS RATORY RINGS MnU ,Mn B> " 2. 5/^3 Surtac*Elsw. 3\4--l Datum ^1^.^^ p,^_ 3D CO. E>16. FAie-fi C^AO i&£OC6^ ,o«i;nn ^^ ^GORt I ln Mf CoorfJ l,c^^oao N ^fcifeas * Samp! a No. ^ & Sampla Depth — 1 •*— r Slows/{ )Color Mois- '-T j 1 ' 1-. 1 ! ! i i 1 ! i ( i I I ! ' -T C.' ' ^ £ _J5"Z V / <ff f— { j ! 1 1 1 i i i i i&*.K ' ^ *\oi*r / r--,- _t--L_ i Consis- tency iype ._„_.£*: ._ Lco5£ ; . • ^ ) £W Ur. 6xt< J-J"- — P^5, 1 T t^i t f • f i ! | i 1 i ^ .? Sf-JO OP ( MA""S=!I » ] AL SY.V 1 1 .• > -7 >;^> «• . /r*?' .****'-'/ •^"H^- /•• /t*/ y;'/.'.: T^V- / • ^ X;^- t Remarks C,^- t^ **^Vi 3^^\ ^" L >^V £!• ta— ^* &r >0 ^ _v — / ^^ »j X -^ .^ — ,* CL/xy^ Fl<J. <KVJD j ', i j •5OL2: i ™ * 1 t plrc.c. .H^ A.C. ^a.o.M. gg A.S. rj GRAVSL ' f* COUNTY OF SAC \ DEPARTMENT OF PU MATERIALS LA-BC f LOG OF BOi P"1 i~> A i .vi - -s. A -w^. -« i3i h-* fv 1 /i KX\ f\ ^* /\ 1 *^ Py"! O i \ A «u\ P-il — i i 1, ,^,-- I r-K1— <-'P'\>\K AM^r^J^O U->-vr>i WV-l t- 1_ ATTACHMENT rN J DIEQO' SHT_> OF *3 BLIC WORKS JRATORY RINGS Hni* Mr* O "" t? ' / / 1— ProiecT Nn 014 1 k^_4~ Date £ /5/^5» Surface E!*v. 3- \A~-~ Darum ^1^.^.5- r- . - . - , A . 'i*" **^ i ^ rt ^ , ^ >S^A\ '^v'' i ^C. ^ ' T^ ^\ V i^'^F^P/^tA - ^> c >* *^ i x i ^ ,— i' d ,iTVr"&Siie & l4otLouSs*mp}«rl.O ;„ , , In Calif. CWirrf i^HO.^lQ Nl ^^-^.^^5" F B*^ic. 8* Model S\>AC_o ~=h'2-&C> (: Oepth Sflirip11! Sample 8lov/s Ccior Mois- t Consis- Mat'l r^c.} No, 0-pth /( J tura tarxcy Type I ' • / . . " 1 '/ ' X ; t j f V\Ol>T 1 •"/'••/'. ^ .- 1. '•>'./>' ^~ , |t\K.A/ : PEJO^C • •• --- ; '' ! 1 '-. As* ' '• f- ^ \ &-rr \ i ^^. • , „ ! ' Loof>£i '/y^J l- f ;- 1 ^-"V i i " M." ^/ *~ ** j ^| x '" l^V ! o\c ; 1 V •>•• '*" ' j 1 / .» ^/ ^i*J':*=- | - . • , . '-i \ " -•' i I : t"a ':-/..*• | a 1 f 1 ^ 1 \J. /.;-.<>;• i-- ' ! a^'*1^ . x *i^f ^: .; -•> ' -T - ' 1 ! u' V7" •/'''/.:,J < ' -^ r^ ^ ; • • ' , j lr i L .. ^ _ . ! l i i l U*" : i ', " ! i 1 ! ! - - ! 1 ! 'l — i 1 ''*"Tiii, ir i i i i i Remarks */ / "\ i <!, L A, y (£JY ^A-^t £> ". &>c>TTOr-\, c^ prCL^. *£?Zt-^ — ' t i OUi-lU ''3 it COUNTY OF SAN DIEGO DEPARTMENT OF PUBLIC WORKS MATERIALS LABORATORY LOG OF BORINGS ATTACHMENT _JI2 SKT 1 OF S Project Hole No. Pro'ecr .\'n. U H Date Surface Elsv.Da'urn _5 -# cv-z-Ao •_iO Location Driil Type & Si«_§LJi£i^£^ Simpler 1.0. Equip. & Mrtrifil ^ 1 Calif. Cnard. 1,^^0,100 N ^41, Decth (FO ^ ** i b •G Sarr.pls No. • i Sa.-npls Blows /( \ Color &"*M f ^R.">> Mcis- ;ure MS1-^ Ksi-^T Con;;s- T,5ncv Mta-^, V t >J^ i-ao*>£ _ *"• Type '. • .•i.J'--.j- •'i':':-:il "• '•'.-. "Li -. V - - !" . -1! \>^ •_ . y ^^ T U * 4 -TiSL^*^ » "T % I O^ ^! • Or JM. "^ N i UT J /'i OF MATERIAL SYMCQLS:A.C.fl.O.M.A. a. r. GRAVE COUNTY OP SAN DIEGO DEPARTMENT OF PUBLIC WORKS MATERIALS LABORATORY LOG OF BORINGS ATTACHMENT SHT_J* 0= -Date Y C<E.|Tt\ i Sampler !.D..in Equip. & Modal &ITAG-O rtiicB t=l«v. 5>\~\-l . CO. Datum j^ Q-z-.A O OR.fi. Cjlif. Coord. 1,^ HO, (p£S N 2^-1, Dsp*h (Fr.) Szrr.pl- No. Ss^pte Blows Depth /{ ) <—i£-j5T i T & Color Mois- ture Consis- tsncy Mafl Type Rsmarks 1 .. L L_• ^ ^*" -r*. ^ I X MO 1^7 '/ /'.'"'•__j_ | - v_ x._t i.0- "I-C3 > f-4. •'*/•#. ?:r-5' '- LE-3SND Or MATERIAL SYMSCLS:A.C A.3. APPENDIXA Previous Explorations County of San Diego DPW, 1994 URS W:\27662028\04000-a-r. doc\11 -Feb-04\SDG COUNTY OF SAN DIEGO DEPARTMENT OF PUBLIC WORKS MATERIALS LABORATORY LOG OF BORINGS ATTACHMENT. SHT 2. OF p p F _ C : E — > i% *•:-m: m mjPt-t rAx\_0*A/\R. MKFoPT - (MUttAA,A* reject N ield Eng riller/As )rill Typ< Iquip. & Depth (Ft.) 4 (f i o •24 26 32 0. UH\e>06? Date-4/\A-/c tUtant C. A.&TC\ LUo 6^E-O T£CVA, Ki IC.A-L >&Size 6> ^ AU6,e*C Model Mo&lL-PRlL Sampler L , &- I.D. ^"rr = Sample No. Sample Depth <tt-^5j«K T q4.-2.l4 &'•&£ ' -T- *3^ I *' I Blows U,\o (t - 3-^, uo.UO ~*5j, -Ivy/* . •' - Color ^-.^ pu^ ^ , - i ^ Mois- ture P^fM* V^r * pA^r VR ^3 Hol-Mn C'- ^ 14- Surfare Elev. 3\2.4~ Datum 3\3-2-^ RefprPfT"0 ' A\K & i r ^»Uo M,AiP. Avl1C.P6A-T 1 rvatirtn ^> •£ - 60R*4«Ll^ 1--4- In na!if_ Coord. \,<\^O,^to5 N C?,24-fe>757O p Consis- tency L-ooSfc Utt$£ Vtfr V^^E LEGEND OF MATERIAL SYMBOLS:-•vd-&:•: Mat'l Type ^ -/ 'A * /y. '•> •/'£?• .'£'*?^* " * vV * jf ~^'^ ' \£J-^s- '•y/W. fi-f •:-JA i:'f! .fefc Remarks C, L AM t-^< ^ A.MD F L L- U T"^£-AA»V\ *h C-^-^Xt-Y ^"^At> > t ^AJ^P^TO tAfc- v«j / -T-ft\ fl Vvi K! i ^f £.LfcA»R. C.E.^$rT*<L^ C<S\Y^&o^\"J ^ L V\fttfCDG-K SCTXOi*^ 6f H"OL-fc. fes ^° "^ P.C.C. HB A.C. ?S R.O.M. = A.B. .•'; GRAVEL •HH nrni •'••*" * ^l SANn BS1 SILTY E^l CLAYEY |m en r ' BITS SANDY ffcHlCLAYEY^ ri AY ^ SANDY C^| SILTY COUNTY OF SAN DIEGO DEPARTMENT OF PUBLIC WORKS MATERIALS LABORATORY LOG OF BORINGS ATTACHMENT. SHT_3 OF Project MR.Hole No. Project No.Date Field Engineer Driller/Assistant Drill Type & Si7» L> J> W6.EX Sampler I.D._±ZJ_fJji±__ln. -- DRILL Surface Elev. Reference Location. Datum 8 E. Calif. Coord \.Sc\v.Oie H J Depth (Ft.) I t. Z.Z 26 32 Sample No. 1 Sample Depth Blows /(tf) Color TA+i- ~fft* E*X Lta* y«frp tft^wl Mois- ture PAMP Consis- tency toofrfe UQO^fe \f&Z>t TX** LEGEND OF MATERIAL SYMBOLS: pf Mat'l Type ^) * •" ^£r:^- ^^^\j / • W. :.-;> rl1 • Remarks s_ 2-M A..C Wfc>v'CLv{ C-lAA ft i4 T*-^ p(.»^lfc. £LA*f EV ^ AK.1 t>&TO f»J. QL. * P.C.C. M A.C. ???? R-O-M. =-= A.B. V*J GRAVEL racLAYEY|m <.,. 1T ra SANDYE7H CAMH II I II bILi ff.m en T CLAY E^SANDY P5g SILTY*-LMT i-r/y ^( AV YsM ^t AV COUNTY OF SAN DIEGO DEPARTMENT OF PUBLIC WORKS MATERIALS LABORATORY LOG OF BORINGS ATTACHMENT SHT 4- OF Project Project No. O\A\g>Ok Field Engineer _5 Driller/Assistant C. A.g>K.\ UUo Date A- Drill Type & Size. Equip. 8t Model_ Sampler I.D.= \--fr Hole No. Surface Elev. Reference g> Location tA\t>PLfe. |n.Calif. Coord. \ . Datum Depth (Ft.) Sample No. Sample Depth Blows /(tf) Color Mois- ture Consis- tency Mat'l Type Remarks &MC, •9.V *U -v"" Z Z-Z •^4 ur 4- ***>- LEGEND OF MATERIAL SYMBOLS:AR fiRAVEL iPcc^YIYim SILT IfHSANDY [[^ICLAYEY^CLAY ^SANDY p?g siLTY COUNTY OF SAN DIEGO DEPARTMENT OF PUBLIC WORKS MATERIALS LABORATORY LOG OF BORINGS ATTACHMENT_£l_ SHT g OF k Project Project No. OV\\g>Ok Field Engineer Date Driller/Assistant C.APg.\UUo Drill Type & Size 6> J Sampler I.D._±Z3L=Jjl4:ln. Hole No Surface Elev. Reference Location —E Calif. Coord. Datum 3\3-2,5 8 Equip. & Model Mo&lL-PRlLL Depth (Ft.) Sample No. Sample Depth Blows /ttf) Color Mois- ture Consis- tency Mat'l Type Remarks Z A- •Z4 C.L,/Wfc--<pvL-U- 6L AX Fl ]&i f - n- LEGEND OF MATERIAL SYMBOLS:P.C.C.A.C.R.O.M.A.B.GRAVEL RE -ES! SAND BSSWJ ^CLA_YEYimi SMT fflO SANDY ^ SANDY &% SI LTY COUNTY OF SAN DIEGO DEPARTMENT OF PUBLIC WORKS MATERIALS LABORATORY LOG OF BORINGS ATTACHMENT. SHT_Jo OF Project Hole No. Project No. UVA\€>O^ Field Engineer _5 Date -* Driller/Assistant Drill Type & Size 6* J> Equip. & Model Surface Elev. Reference Location. Datum •S.'TODY, A/2- , A.lK:P6fi-T Sampler in.= V-4-In.Calif. Coord.N = 2-4 Depth (Ft.) 2 4 6* Z-Z 26 32 Sample No. Sample Depth Slows Color Lf Mois- ture •S.KV 3£ LEGEND OF MATERIAL SYMBOLS: SAND P.C.C.A.C.R.O.M.A.B.GRAVEL SILTY SAND C^TrfYITTllsiLT fH SA.NSY CLAY S3 SANDY RJ3 SILTY APPENDIXA Previous Explorations County of San Diego DPW, 1999 URS W. \27662028\04000-a-r doc\11 -Feb-04\SDG 07/14/1999 15:05 619-268-0461 DEPT OF PUBLIC WORKS COUNTY OF SAN DIEGO DEPARTMENT OF PUBLIC WORKS MATERIALS LABORATORY LOG OF BORINGS PAGE 07 ATTACHMENT _ SHT _J OF Project Project No.. No. Date Field Engineer Driller/Assistant Surface Elev. Reference — Location Datum Drill Type & Size. Equip. & Model _ Sampler I.D..In.Calif. Coord.N Depth (Ft.) I 10 14 Sample No. Sample Depth Blows «&4 Color Mo is* ture Consis- tency f Mat'l Type Remarks ~v> To LEGEND OF MATERIAL SYMBOLS:P.C.C.A.C. SAND SILTYSAND m CLAYEYSAND SILT SANDYSILT tt/L CLAYEYt?::SILT R,O-M. CLAY A.B. SANDYCLAY GRAVEL SILTY CLAY 07/14/1933 15:05 619-968-0461 DEPT OF PUBLIC WORKS PAGE 08 ATTACHMENT. COUNTY OF SAN DIEGO DtPARTMENT OF PUBLIC WORKS MATERIALS LABORATORY LOG OF BORINGS Project Project No. gLrT-Hole No. Date Field Engineer Pg.lU.fM6Driller/Assistant Drill Type & SizeP P/ Sampler I.D._. Equip. & Modal fcP •" U> [ .In.Calif. Coord..N Oeptii (FtJ Sample No. Sample Depth Blows Color Mois- ture Consis- tency Mat! Type Remarks Fi^rt M 16 W $^T9 | -I/-*- OF MATERIAL £& SAND SILTY SAND CLAYEYSAND StLT P.C.C. SANDY SILT A.C. 5;CLAYEY SILT ^ fl.O.M. CLAY A.B. SANDY CLAY SILTYCLAY 07/14/1539 15:0!S19-268-04S1 DEPT OF PUBLIC WORKS PAGE 09 ATTACHMENT. COUNTY OF SAN DIEGO DEPARTMENT OF PUBLIC WORKS MATERIALS LABORATORY LOG OF BORINGS Project Proiect No. Field Engineer Driller/Assistant Drill Type & Size, Equip, & Modal Depth (Ft.) Sample No,. Sample Depth Blows Color Mois- ture Consis- tency Mat'l Type Remarks 'I^i 4"*P- aeVon r* V ^^n V To "to u LEGEND OF MATERIAL SYMBOLS: SAND SILTY SAND CLAYEYSAND SILT P.C.C. SANDYSILT A,C.R.O.M.A.B.m SANDYCLAY GRAVEL SILTY CLAY 87/14/1999 15:05 619-268-0461 DEPT OF PUBLIC WORKS COUNTY OF SAN DIEGO DEPARTMENT OF PUBLIC WORKS MATERIALS LABORATORY LOG OF BORINGS PAGE 10 ATTACHMENT YP SHT t^CHMEl OF Hole No. I Surface Elev. Reference Location Datum Drill Type Equip- & Model Sampler in dd-uvfr1 In, Calif. Coord.. 07/14/1999 15:05 &19-268-0461 DEPT OF PUBLIC WORKS PAGE 11 COUNTY OF SAN DIEGO DEPARTMENT OF PUBLIC WORKS MATERIALS LABORATORY LOG OF BORINGS ATTACHMENT. SHT._J2__QF 6 Project Hole No, Project No.Date Field Engineer, f 0 Drill Type fit Size & Equip. & Model 2 Wv Sampler 1. D. 6*K-V I6~6s>l f* In. Surface Elev. Reference — Location Calif. Coord.N LEGEND OF MATERIAL SYMBOLS: SAND CLAYEYSAND n SILT P.C.C. SANDY SILT A.C.R.O.M. CLAY A,B. SANDY CLAY GRAVEL StLTYCLAY 07/14/1990 15:05 619-268-0461 DEPT OF PUBLIC WORKS COUNTY OF SAN DIEGO DEPARTMENT OF PUBLIC WORKS MATERIALS LABORATORY LOG OF BORINGS PAGE 12 ATTACH M t NT _ SH-T (0 OF Project Hole No. Project No.LlH Field Engineer fr/tfl/'P) Driller/Assistant Drill Type & Size. Equip. & Model _ i Surface Elev. Reference _ Location , A Sampler I.O...In.Calif. Coord..N., Depth (Ft.) Sample No. ample Depth Blows Color Mois- ture Consis- tencv Mat'l Type Remarks -2 5 4 t*rlf t Co LEGEND OF MATERIAL SYMBOLS: SAND SILTYSAND CLAYEY SAND SILT P.C.C. SANDYSILT A.C. ;LA\SILT R.O.M. CLAY A.B. SANDYCLAY GRAVEL « SILTY3 CLAY APPENDIXA Previous Explorations URS, 2002 URS W.\27662028\04000-a-r.doc\11-Feb-04\SDG Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Key to Log of Boring Sheet 1 of 1 SAMPLES ex 2O MATERIAL DESCRIPTION REMARKS AND OTHER TESTS COLUMN DESCRIPTIONS 1J Elevation: Elevation in feet referenced to mean sea level (MSL) or site datum. Depth: Depth in feet below the ground surface. Sample Type: Type of soil sample collected at depth intervalshown; sampler symbols are explained below. 4] Sample Number: Sample identification number.Unnumbered sample indicates no sample recovery. ~5J Sampling Resistance: Number of blows required to advance driven sampler 12 inches beyond first 6-inch interval, or distancenoted, using a 140-lb hammer with a 30-inch drop. el Graphic Log: Graphic depiction of subsurface materialencountered: typical symbols are explained below. 7| Material Description: Description of material encountered; may include relative density/consistency, moisture, color, particle size; texture, weathering, and strength of formation material. TYPICAL MATERIAL GRAPHIC SYMBOLS Water Content: Water content of soil sample measured in laboratory, expressed as percentage of dry weight of specimen. Dry Unit Weight: Dry density of soil sample measured inlaboratory, in pounds per cubic foot. Remarks and Other Tests: Comments and observationsregarding drilling or sampling made by driller or field personnel. Other field and laboratory test results, using the following abbreviations: Chemical tests for corrosivity Compaction test by modified effort One-dimensional consolidation test Liquid limit (from Atterberg limits test), % Plasticity Index ILL - PL], %; NP=nonplastic Organic content test, % Resistance value Sieve analysis, %<#200 sieve Unconfined compresstve strength test, Qu in ksf Three-point wash sieve, %<#200 sieve Silty SAND (SM) TYPICAL SAMPLER GRAPHIC SYMBOLS Sample collected in a bag or sack Standard Penetration sampler 2.5-inch-OD Modified California sampler OTHER GRAPHIC SYMBOLS 2 First water encountered at time of drilling andsampling (AID) Water level measured at specified time after- completion of drilling and sampling Minor change in material properties within a stratum Inferred or gradational contact between strata GENERAL NOTES 1. Soil classifications are based on the Unified Soil Classification System. Descriptions and stratum lines are interpretive; actual tithologic changes may be gradual. Fietd descriptions may have been modified to reflect results of lab tests. 2. Descriptions on these logs apply only at the specific boring locations and at the time the borings were advanced.They are not warranted to be representative of subsurface conditions at other locations or times. Figure C-1 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring B-1 Sheet 1 of 1 Date(s) 1/8/02Drilled 1IWU* Method Hollow Stem Au9°r Type*9 Mobile B-61 Groundwater Level M___ «.»..«and Date Measured None ««coun Borehole c_Si -..#*i__. Backfill Sotl cuttlnfl8 Logged By Drill BitSize/Type DrillingContractor Sampling Method(s) Location D. Kirkman 8" F&C Drilling Bulk, ModCal Checked j Wer|e Total Depth 120 feetof Borehole 12-0 feet Approximate 1544 feetSurface Elevation ia<wreei Hammer 14Qm See Site Plan (Sta. 171+75, 22' left) c"o "5 £ — £ Q> <D - - 5- - - 10- 15- 20- 25- _j SAMPLES 0)JD Q. E>; ^z Bulk #1 1-1 1-2 1-3 o. w Js 42 52/6' 60/6" o ^•1 o.(0 O - MATERIAL DESCRIPTION WEATHERED GRANITIC ROCK6" asphalt concrete over dense, moist, dark reddish brown, silty SAND (SM) - f — Becomes very dense_- « • - f — Becomes dark grayish brown - Refusal at 12.0 feet - - ^ "cp15 4 7 4 15Q. II 103 98 117 REMARKS AND OTHER TESTS SAf3Q), CHEM.COMP, R-Value LL-26, Pl=9 - TffDO Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring B-2 Sheet 1 of 1 Drilled* 1/8/02 By"63 D- Kiri<man Drilling Hollow Stem Aumr Drill Bit _„Method noilow :>tem Auger Size/Type u Type*'9 Mobile B-61 Contractor F&C Drlllin9 aiSStelKa's^ed Not encountered wSSSdJs) Bulk/ModCal Checked J-Wer|e Total Depth 4ee*M*of Borehole 15.5 feet Approximate -BA^ K faa«Surface Elevation I*M-a reei ri9mm6r ,« ^min Qgjg 140/30 Backfill16 Soil Cuttin9s Location See Site Plan (Sta. 169+25, 40' right) c"o '1 6 0- SAMPLES o-° tl III Bulk #2 5— W IT 2-1 - 10- 15- 20- 25- 30- I 2-2 n 2-3 i_ o. 78 52 50/2" .0 aTO O MATERIAL DESCRIPTION WEATHERED GRANITIC ROCK Very dense, moist, dark reddish brown, silty SAND (SM) - - - ^ — Becomes yellowish brown ~ - - ' - - — - . Refusal at 15.5 feet wne* VB1A Is 7 3 t»Q. 111 113 REMARKS AND OTHER TESTS R-Value WA(24) Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring B-3 Sheet 1 of 1 gSj> 1/8/02 £— D.KIrkman MeS Hollow Stem Auger gg^ype 8" Type*9 Mobite B'61 Contractor F&C Drillin9 Groundwater Level ..... on-0,irrt««H Sampling R,,ii,iM-Hraland Date Measured Not encountered Method® BulWModCal Checked j Wer|c Total Depth -mef-a*ofBorehbte 10.5 feet r\pproxirn3i6 'iC'io fAA^ Hammer +At\nnData i«uwu Backfill13 Soil cuttin9s Location See Site Plan (Sta. 165+00, 35' left) c.g To £ JD 0> 0)0) 5- 10- 15- 20- 25- SAMPLES ^ I Bulk #3 B - B 3-2 <DQ. O> 5"5 50/6' 50/3"Graphic LogMATERIAL DESCRIPTION FILLMoist, dark reddish brown, silty sand . WEATHERED GRANITIC ROCKVery dense, moist, dark grayish brown, sitty SAND with gravel (SM) f — Becomes very dense - Refusal at 10.5 feet TTDCE WaterContent, %4 9 13Q. 123 REMARKS AND OTHER TESTS SA(14), R-Value WA(25) No recovery Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring B-4 Sheet 1 of 1 Date{s) 4 mm?Drilled 1'8'02 g2K5 Hollow Stem Auger D^R|9 Mobile B-61 %£££££ Not encountered iSS" Sol. cutting. LoggedBy Drill Bit Size/Type DrillingContractor SamplingMethod(s) Location D. Klrkman 8" F&C Drilling Bulk/ModCal Checked j Wer|e Total Depth B 5 ff tof Borehole b'5 teet Approximate 14fi1 f tSurface Elevation 14b1 Teet Da£mer 140rao See Site Plan (Sta. 157+80, 25* right) .9 0 <D rll 03 • 10- 15- 20- 25- SAMPLES ^ « c *"" z Bulk #4 4-1 S 50 50/4" O)••>_io CL 2 O - : MATERIAL DESCRIPTION WEATHERED GRANITIC ROCK3" asphalt concrete over very dense, moist, dark grayish brown, sitty SAND (SM) - - Refusal at 6.5 feet - - - ^9 ^ Jsli S ogo 4 l£» ^^> ii £*4 110 REMARKS AND OTHER TESTS R-Value wmc Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 gjjg> 1/9/02 ^8** D. Klrkman MMhSl HoHow Stem Auger ^ype 8" TypeR'9 Mobile B"€1 Contractor F&C Drillln9 Groundwater Level Ncrf -„,.„„„*«»«,»* Sampling R,,iiriMortraiand Date Measured Not encountered Method(s) Bulk/ModCal BaddS** Soil cuttings Location See Site Plan (147+80, 10' left) Log of Boring B-5 Sheet 1 of 1 Checked j Werle Total Depth IBS feetof Borehole 1»-5teet Approximate 1 37n f , Surface Elevation BBl Hammer 140/3Q c .9 to £ <D Q) /n (p 0- SAMPLES ll i m BuMfc * 5- 10- 15- 20- 25- 30- J 5-2 II 5-3 S.tn 74 39 52/6" 81 o JZa.TO O - MATERIAL DESCRIPTION FILL ^ 4" asphalt concrete over moist, yellowish brown, silty sand with gravel . WEATHERED GRANITIC ROCK Very dense, moist, dark greenish gray, silty SAND with gravel (SM) - Refusal at 10.5 feet TTDO WaterContent, %5 6 5 15a. Is |-| 115 107 100 REMARKS AND OTHER TESTS SA(22), R-Value Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring B-6 Sheet 1 of 1 gSgf) 1/9/02 ^gged D Kjrkman SS Hollow Stem Auger jj**^ r ^gRi9 Mobile B-61 Contractor F&C Drlllins Groundwater Level Mrrf encountered Sampling Rulk/ModCaland Date Measured MO1 encoun»r»a Method(s) «"»"oauai Checked j Wer(e StorahS 10'5feet Approximate i«nfa*tSurface Elevation "59 feet Hammer 140/3(J Backfill16 So" cuttings Location See Site Plan (Sta. 144+80, 20' right) o ?L €-£ 0) <D Q) 5- 10- 15- 20- 25- SAMPLES 0) m -Qffi C £ i I Bulk #6 fl 6-1 n 6-2 o. 56/6' 50/3" g1 O. 5 O MATERIAL DESCRIPTION FILL Dry to moist, dark graysih brown, silty sand with gravel _ WEATHERED GRANITIC ROCK Very dense, moist, dark grayish brown, sitty SAND (SM) with gravel - Refusal at 10.5 feet I WTDC WaterContent, %6 3 "G 3 gi 116 119 REMARKS AND OTHER TESTS R-Value WA{7> Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring B-7 Sheet 1 of 1 Drilled^ 1'9'02 B?"ed D.Kirkman MeS Hollow Stem Auger g£e£ype 8" ?ypeR'9 Mobile B-61 Slctor F&C Drilling CjrOtinOWSlOr LoVcl U*** &n4*AiintarArl OompilRy QiilkHM*wlf*al Checked j Wer|e JfeorehSE 10-5feet sErfaceTElevation 1133fe«» Da5mer 140/3° ^ckfilf6 Soil cuttings Location See Site Plan (Sta. 119+40, 35* left) co Q) <D <D Q o-J SAMPLES 11 j III Bulk #7 5- | 10- 15- 20- 25- 30- u 7"1 Z 7-2 Q>o.to ^"o 16 50/3" D)O .O Q.so . • • MATERIAL DESCRIPTION FILL Moist, dark reddish brown, silty sand f — Becomes yellowish brown with gravels WEATHERED GRANITIC ROCK , Very dense, moist, dark grayish brown, silty SAND (SM) with gravel . Refusal at 10.5 feet T1DQ II 6 ? "5Q. £\S 107 REMARKS AND OTHER TESTS SA(19), CHEM,COMP, R-Value Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring GB 1 Sheet 1 of 1 Date(s) 9MO/02Drilled twu* MrihSt Hollow Stem Auger Drill Rig CME 7SType CME75 Groundwater Level Mrrf -n^n....*-™,!and Date Measured Not encountered Borehole c_,. ..,»«_„,,Backfill Soil cuttings LoggedBy Drill BitSize/Type DrillingContractor Sampling Method(s) Location D. Ktrkman 6" F&C Drilling Bulk,ModCal Checked j Wer|c Total Depth ,_ n . .of Borehole 20.0 feet Approximate ,_,«- Surface Elevation J13-D U*£mer 14WW30" See Site Plan 1 SAMPLES cg ll fl 0_ . * 1 1h- Z ll IIill Bulk #11A-u-315 U 5-Hrl * * HI 1 -310 L 10- -305 || 1"2 1<_W113 - -300 . -295 25- -290 M_j H 1-* k-s.tos*- m£ 80 50/3P 50/5" 50/5" s*1 o a.ta 6 MATERIAL DESCRIPTION FILL2" asphalt concrete over 4" base over moist, yellowish brown, silty fat clay withsand - • _ SANTIAGO FORMATION Very dense, moist, tight gray with yellowish brown staining, silty fine SAND (SM) - - - - - . Bottom of boring at 20 feet - - - is "c SO 19 9 12 18 tio. ^£i c IDa £>o 131 112 REMARKS AND OTHER TESTS SA{74). LL=52. Pt=36, COMP, CHEM SA(54) YTDC Figure c"2 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring GB Sheet 1 of 1 2 Date(s) JMQIIWDrilled znWBZ SeS Hollow Stem Auger MR* CME75 SSSfSSA Not encountered 1538" Sol. cuttings Logged By Drill Bit Size/Type DrillingContractor Sampling Method(s) Location D. Kirkman 6" F&C Drilling Bulk.ModCal Checked j Werte vsssi »••«-« Approximate ,1Q cSurface Elevation •>ia'D g™"18' 140#/30H See Site Plan co « £>*^ D.*-o> qj ID qjmje Q£ 0- -315 5- SAMPLES I 0)I! II 2"1 -310 10- -305 15- -300 20- -295 25- 290 H 2~2 J " I « £ 6Bm£ 70 50/5' 50/3" 50/4' 1u'izQ.CD O ^ •' MATERIAL DESCRIPTION FILL 2" asphalt concrete over 2" base over moist, yellowish brown, silty day with sand . - SANTIAGO FORMATION Very dense, moist, olive brown, silty SAND (SM) with shells - f — Light gray with yellowish brown staining - - - . Bottom of boring at 20 feet - -WaterContent, % j18 16 15 15 "GQ. 3f *<nc(DQ £ Q 108 113 REMARKS AND OTHER TESTS wme* F)9ure c~3 UKo Project: Palomar Airport Center L of Borjng QB 3 Project Location: Carlsbad, California Project Number: 58-00111062.00000 Sheet 1 of 1 Drille^' 2/19/02 By"** D- K'rt""an Checked j We|1e Drilling U«ll/*i»* Qtam Annar R" Total Depth nn n footMethocl MOMOW stem Auger Size/Type b of Borehole ^o.ureet Drill Rig rue 7c Drilling F»r nriiiinn Approximate ,17 eType CME75 Contractor F&C Drilling Surface Elevation 317'5 Graundwater Level M_. ««^«,.n»a«rt Sampling Bllllr UAjrai Hammer 4Anann»and Date Measured Not encountered Metriodfl) Bulk,ModCal Data 140W30 Ba^Rlf6 So" Cuttin9s Location See Site Plan 1 SAMPLES c" 0)15 d)~CD - -315 5- fe _ •§ £ 2 I - -310 1 1°HT| 3-2 -305 15- -300 20- - -295 25- -290 _ ] » JM • CL CD II 14 50/4" 50/3' 50/6' ff o CL(D O • • MATERIAL DESCRIPTION FILL2" asphalt concrete over 2" base over moist, yellowish brown, silly day - - - SANTIAGO FORMATION_ Very dense, moist, tight gray with yellowish brown staining, silty fine SAND (SM) _ - - " - . Bottom of boring at 20 feet - - - - sa §05o 21 14 12 14 •5 £ c Oe-o 105 114 REMARKS AND OTHER TESTS VVMM Figure C-4 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring GB 4 Sheet 1 of 1 Date(s) 0/19/02Drilled 21™"* BSSl Hollow Stem Auger ?y CME75 ZSSSOSlSi No. encountered SSSS" Soi. cuttings Logged By Drill Bit Size/Type DrillingContractor Sampling Method(s) Location D. Kirkman 6" F&C Drilling Bulk, ModCal Checked j Wer|e Total Depth ~A - «...of Borehole 20-° *** Approximate «««Surface Elevation l}1o-u Hammer 140W3(r See SHe Plan c.9 JD <D (p <D -310 5-: -305 10- -300 15- -290 25- SAMPLES a>.0 II Bulk #2 I « I « J, m .00 41 65 50/6" 50/3"Graphic Logf Y'*.1 MATERIAL DESCRIPTION FILL2" asphalt concrete over 4" base over moist, yellowish brown, silty clay with sand and gravel SANTIAGO FORMATION Hard, moist, light gray with yellowish brown staining, sandy CLAY (CL) to clayey ' SAND(SC) Very dense, moist, light gray with yellowish brown staining, silty SAND (SM) - f— Becomes tess silty - . Bottom of boring at 20 feet - c 5°So 17 20 17 15 19 •fco. 'in Q>O O 112 REMARKS AND OTHER TESTS SA(46)1 COMP. R-value SA(49) _-_M Figure C-5 Project: Palomar Airport Center L of Borjng QB 5 Project Location: Carlsbad, California Project Number: 58-00111062.00000 Sheet 1 of 1 gjg> 2/19/02 fogged p KJrkman Checked j Wer|e Drilling Hollow Stem Aunar Drill Bit g.. Total Depth 2QDf«BtMethcxJ Hollow 5»m Auger Size/Type b of Borehole zo-° teet Drill Rig r>Uc 7c Drilling cor. m-minn Approximate ,,,- -Type CME75 Contractor F&C Drilling Surface Elevation 315'5 Groundwater Level M-* -.,-rt,,n*-p-rf Sampling »„,,, u^nr-ai Hammer 4An#nn»and Date Measured Not encountered Meth^d(I) Bulk- ModCal Data 1 40#/30 BackfiS'6 Soilcuttin9s Location See Site Plan o 'ro £> *-• Q.*-(DO) <o <D Hl3 Qj£ -315 -310 10- -305 15- -300 -295 25- -290 SAMPLES o>» t3 1 I - J « I « J - & (05+- •2Sm£ 40 46 50/4" 50 Graphic LogMATERIAL DESCRIPTION FILL2" asphalt concrete over 2" base over moist, yellowish brown, stlty clay with sand SANTIAGO FORMATION_ Dense, moist, light gray with yellowish brown staining, silty SAND (SM) _ . Bottom of boring 20 feet WaterContent, %20 19 15 17 Dry Density, pcf108 109 REMARKS AND OTHER TESTS YTD*? Figure c*6 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring GB 6 Sheet 1 of 1 Drilled3' 2/19/02 By"^ D. Kirkman Drilling Unllnw Stem Auner S"" S1 6"Method nonow atom Auger Size/Type ° Ty^eR'9 CME 75 Contractor F&C Drillln9 Groundwater Level ijrtt«»rvr»imt«r»rf Sampling R ,k M-H^-Iand Date Measured Not encountered Method(s) Bulk.ModCai Checked j.Werte Tf°B ' DhP|h 2°'° feet ^SSSsevation 314-5 Hammer 14O&30"Data BaSfilf6 Soil cuttings Location See Site Plan c.0 o dj (b OJ -310 5- _ -305 10- . -300 15- . -295 -290 25- -285 SAMPLES -0 6 T-O ] - £ s*.O Q 41 56 50/6" 50/5" s> .0 o.ffo • MATERIAL DESCRIPTION FILL2" asphalt concrete over moist, yellowish brown, silty day with sand SANTIAGO FORMATIONDense, moist, light gray with yellowish brown staining, silty SAND (SM) - f— Becomes very dense . Bottom of boring at 20 feet ITOCUna si i 20 19 16 16 Dry Density, pcf107 113 REMARKS AND OTHER TESTS Figure C-7 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-001 11062.00000 Log of Boring Sheet 1 of 1 GB7 V^/ O/1 Q jfl?Dnlloo BethS) Hollow Stem Au9er Ty^le^9 CME 75 S3SXSZ& No. encountered SSSf So., cuttings Logged By Drill Bit Size/Type Drilling Contractor Sampling Method(s) Location D. Kirkman 6" F&C Drilling Bulk,ModCal Checked By Total Depth of Borehole J. Werle 20.0 feet Approximate 316 0Surface Elevation •)lo-u Hammer 1 403/30"Data t'wiHMt See Site Plan ro £ -315 5- -310 10- -305 15- -300 -295 25- -290 SAMPLES QJ II I" m !i ™II s- <DQ. I/i 55 50/6" 50/5' 50/4- » o Q.(Q O MATERIAL DESCRIPTION FILL2" asphalt concrete over 2" base over moist, yellowish brown, silty clay with sand _ SANTIAGO FORMATIONVery dense, moist, light gray with yellowish brown staining, silty fine SAND (SM) - - - - f — Increase in staining, with shells - . Bottom of boring at 20 feet - - # P18 22 11 r> £ c O E*O REMARKS AND OTHER TESTS Y1D4F Figure c~8 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring GB 8 Sheet 1 of 1 Date(s) 2/1 4/02 MetS Hollow Stem Auger L/nll r\iQ f*uc TCType CME75 2?£Effi££l No, encountered £3S* SOM cuttings Logged By Drill Bit Size/Type Drilling Contractor Sampling Method(s) Location D. Kirkman 6" F&C Drilling Bulk.ModCal Checked By Total Depth of Borehole Approximate Surface Elevation J. Werte 6.0 feet 318.0 Hammer i4o#/30"Data See Site Plan co TO £ ^"S §""0) 0- -315 5- -310 10- -305 -300 20- -295 25- -290 30- SAMPLES .a ^ 2 I -' 0)a. (0 b3£ 46 O)o o JZa.(D O MATERIAL DESCRIPTION FILL2" asphalt concrete over moist, yellowish brown, silt clay with sand _ SANTIAGO FORMATIONDense, moist, light gray with yellowish brown staining, silty SAND (SM) - _ Bottom of boring at 6 feet - - - - - - - 3? ^c 5u 19 Q. C Q Q 108 REMARKS AND OTHER TESTS wvn^ F'9ure c'9 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring GB 9 Sheet 1 of 1 DrtS? 2/19/02 B?"ed D- Klrkman 33a HONOW Stem Auger gSftp. 6" ^Rig CME75 cSctor F&C Drilling Groundwater Level w_. ttn~-,m*er«rf Sampling R IW MftHr»iand Date Measured Not encountered Method(s) Bulk.ModCal DV J- Werle Total Depth - n ,„_. of Borehole 6'0feet Approximate I^A t\ Hammer 140#/30"Data Backs?6 Soil Cuttln9s Location See Site Plan cg <DO> a) fl)111 (1) Q .£ o- -310 5- -305 10- -300 15- -295 20- -290 25- -285 30- SAMPLES (D to ** |« 0)DL (O ll 65 Graphic LogMATERIAL DESCRIPTION FILL 2" asphalt concrete over 2" base over moist, yellowish brown, silty clay . SANTIAGO FORMATION Dense, moist, light gray with yellowish brown staining, silty SAND (SM) -- . Bottom of boring at 6 feet WaterContent, %21 Q. SC0)O O 106 REMARKS AND OTHER TESTS •VMM Figure C-10 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring Sheet 1 of 1 GB10 gjgj) 2/19/02 MeS Hollow Stem Auger °JW» CME75 SfSSSSSt Not encountered *3S* Sol. cuttings Logged By Drill Bit Size/Type Drilling Contractor Sampling Method(s) Location D. Kirkman 6" F&C Drilling Bulk.ModCal Checked j Wer,e Total Depth ««««.-*of Borehole 16.0 feet Approximate ,,,- - Surface Elevation J1" Hammer ijn«(in»Data 140#/30 See Site Plan o "5 £ >*- O.*-(DO) m 0) HJ.fi (5.2> 0- SAMPLES Q>.Q | *" Z ~310 , Bulk #3 5- -305 10.- -300 15- -295 20- -290 25- -285 30- 10-1 10-2 10-3 <DQ. 10 OOmfi 46 45 61 O)o o D.Eo MATERIAL DESCRIPTION FILL2" asphalt concrete over 2" base over moist, yellowish brown, silty clay • SANTIAGO FORMATION Dense, moist, light gray with yellowish brown staining, silty SAND (SM) - - - f~ Becomes very dense - _ Bottom of boring at 16 feet - - - - ^c££ |SSo 22 24 t5CL >^ '5c0>Q &-O REMARKS AND OTHER TESTS WJO^f Figure C-11 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring GB11 Sheet 1 of 1 Drifted 2/19/02 ^ged D.Kirkman MS Hollow Stem Auger Type*'9 CME 75 Drill Bit ...Size/Type ° Drilling CJ»r rt_iin««Contractor F&C Dnllin9 Groundwater Level Wrtt „„-„„ ntnroH Sampling R .k Mft,ip-iand Date Measured Not encountered Method(s) BulK' ModCal gv ° J. Werle Total Depth -unf^atof Borehole ' ' •" reei Approximate ~17 _Surface Elevation J1'-D Hammer 4 >«(uti->nnData 14CW30 iackfi?6 Soil cuttings Location See Site Plan c.0 o- -315 5- . -310 10- -305 1 15- -300 20- -295 25- -290 30- SAMPLES 0)•° |- J "-2 QJa. 5«5 0 17 51 enO o a.n> 5 MATERIAL DESCRIPTION FILL1" asphalt concrete over 2" base over moist, yellowish brown, silty day with sand •~ Moist, greenish gray mixed with yellowish brown and light gray, sandy clay - - - SANTIAGO FORMATIONVery dense, moist, light gray and yellowish brown, sitty SAND (SM) . Bottom of boring at 1 1 feet VfDC ... c 1 o Q. '5>c VD O REMARKS AND OTHER TESTS Figure C-12 r- Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring IB 1 Sheet 1 of 2 R5|£S?) 2/18/02 l£99ed D.KirkmanL-ffiii(*u oyasa **»•»*«»** asu ^ Drill Rig CME 7- Drilling Tri-Countv DriltlnaTvnn wlnC f 9 Onntrartnr lil^^UUIHy vniliny Groundwater Level u-* a-.,,..,,*-™,,! Sampling cm-and Date Measured Not encountered Method® SPT Checked J-Werle Total Depth 31 fl fe tof Borehole Jl.wreet sSSSemBevation 315-5 BEmw 14WW30" BactcRI?8 Bentonite chips Location See Site Plan .0 > H.ID'S m'33 LU.fi Qfi -315 5--310 10- -305 15- -300 20--295 25--290 SAMPLES m -QQ) f ^ i N k_ Q. S1 o am O MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over 8" base over moist, dark gray, silty sand with gravel Moist, medium brown, silty day with sand and gravel LANDFILLMoist, dark grayish brown, silty clay with plastic, paper, wood, metal SANTIAGO FORMATIONVery dense, moist, light gray with yellowish brown staining, silty fine SAND (SM) ffn^rUIC2> || •5Q. 'ncmo Q REMARKS AND OTHER TESTS Figure C-2 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring Sheet 1 of 1 IBS Date(s) 7/18/02Drilled *"»«« SS Hollow Stem Auger ¥*J* CME75 238SREJZ& Not encountered iSSSn8 Bentonite chips Logged By Drill Bit Size/Type DrillingContractor SamplingMethod(s) Location D. Kirkman 6" Tri-County Drilling SPT Checked j Wer|e Total Depth i60fp*.tof Borehole ib-UTeet Approximate 71 e nSurface Elevation <IID-U Hammer lArmnn"Data 140#/30 See Site Plan c".g <J> O o> 0> LJJ.2 Q.8J -310 5- -305 10- -300 15^ -295 20- -290 25- SAMPLES <D Q. tn 50 49 .O Q.(D O MATERIAL DESCRIPTION COVER FILL 4" asphalt concrete and base over moist, yellowish brown, silty day with sand LANDFILL _ Moist, dark grayish brown, silty clay with sand. wood, plastic - . SANTIAGO FORMATIONDense, moist, light gray, silty fine SAND (SM) — — . Bottom of boring at 1 6 feet _ _ || Q. "w 0> O fr-et REMARKS AND OTHER TESTS ¥¥!*•? Figure c"4 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring IB 4 Sheet 1 of 1 Drilled 2/18/02 B?"ed D.Kirkman 8S& HoMow Stem Auger g^ype «" ?y^Ri9 CME75 cXfctor Tri-County Drilling Groundwater Level .,_. __..- .._»___ j Sampling CDTand Date Measured Not encountered Methodfs) SPT I^S*!?'6 Bentonite chips Location See Site PlanBaCKITIt r Checked J-Werte Total Depth 15 5 feetof Borehole ' a-a reei sSSSSTBevation 314-° Hammer 140#/3()B co uj& Q£ 0- -310 5- -305 10- -300 15- -295 20- -290 25- -285 30- SAMPLES %.Q Z 11- Z sS 4" 0)Q. to 1? 59 Q.n O : - :" :" MATERIAL DESCRIPTION COVER FILL 4" asphalt concrete and base over moist, yellowish brown, silty clay with sand LANDFILL_ Motet, dark grayish brown, silty clay with sand, rubber, plastic _ - SANTIAGO FORMATION Very dense, moist, light gray, silty SAND (SM) Bottom of boring at 15.5 feet YTDC 5o Q. 'at 1 O REMARKS AND OTHER TESTS Figure C-5 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring IB 7 Sheet 1 of 2 g-Hj> 2/18/02 Bogged D Kjrkman MeSd Hollow Stem Auger gg^ 6" ?2LR'9 CME 75 rSmrtor Tri-County Drillingt y\jG wui in doiui Groundwater Level MA*. &*****•» m+A*Ari Sampling CDTand Date Measured Not encountered Methodfs) SPT Checked j Wer|e Total Depth «« K *„„.of Borehole 30'5 feet Approximate -»i c cSurface Elevation -*13-3 Hammer .u/uiran"Data 14W/30 Backfill16 Bentonite cn'Ps Location See Site Plan c.g to £ J> OJ <D QJ o- 315 5- SAMPLES 0) •° 310 I 1 10- -305 - - 15--300 20- -295 25H -290 30-N 5-1 a. (0 o"o 60 C3>O O a.03 O MATERIAL DESCRIPTION COVER FILL4"asphalt concrete over 8" base over moist, yellowish brown, silty clay with sand LANDFILL _ Moist, medium brown, silty sandy clay with gavel, plastic - - -f— Becomes black, increase in trash : - - _ - - — SANTIAGO FORMATION Very dense, moist, light gray with yellowish brown staining, silty SAND (SM) ^"c II •eCL CVa t- Q REMARKS AND OTHER TESTS vvn«f F'9ure c"8 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring IB 7 Sheet 2 of 2 cfo TO £> ^ Q.*J0)0) 0) O UJiS? Q.ffi 30--285 35--280 40- -275 45- -270 50--265 55--260 60- -255 65- SAMPLES OJ » t ^1N au>s*.0 0m£ D>O o 'JCQ.ro O •H-h' MATERIAL DESCRIPTION Bottom of boring at 30.5 feet _ - - - - - ^"c v£ 1°5o t5o. _>. *«c: 0)D £•O REMARKS AND OTHER TESTS VVMCP Figure c~8 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Date(s) intumDrilled *non« MethS Hollow Stem Auger %%** CME75 Groundwater Level Unt ~nf.n..n^^imi»and Date Measured Not encountered RfSfill 6 Bentonite chips co '•= r-~2 £>+- Q.-W-_® 0) (1) 0) o- -315 -310 10- -305 15- -300 20- -295 25- -290 30- SAMPLES 0>X> N 8-1 feCL 69 O)o o o.ra O i Log of Boring IB 8 Sheet 1 of 1 Logged D. Kirkman Drill Bit ...Size/Type Q ffirttor Tri-County Drilling Sampling CDTMethod(s) ari Location See Site Plan Checked j Wer|e Total Depth 1ft = «-._»of Borehole io.oroei Approximate 3-175Surface Elevation Hammer <tAn*nn"Data 14WWJU MATERIAL DESCRIPTION COVER FILL4"asphalt concrete over 1" base over moist, dark grayish brown, silty sandy claywith silt -- LANDFILL _ Moist, dark olive, silty day with sand, plastic and wood -. -f — Increase in wood debris - - - SANTIAGO FORMATIONVery dense, moist, tight gray, silty SAND (SM) . Bottom of boring at 18.5 feet - - - P15 Dry Density, pcfREMARKS AND OTHER TESTS Vfnff" F'9ure c'9 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 BSSP 2"«»2 MeB Hollow Stem Auger D^Rig CME75 and Datp Measured Not encountered Backfill16 Bentonlte cnlPs Log of Boring IB 9 Sheet 1 of 1 Logged p Kirkman SiS^ype G" ffilctor Tri-County Drilling Sampling CDTMelhod(s) =>ri Checked J>Wer|e Total Depth 11 Qfo tof Borehole 1 1-0 feet Approximate ,- c ESurface Elevation -310'3 Hammer linann"Data TWWMU Location See Site Plan o G) QJ jjj fl) -315 5--310 10- 15--300 20- -295 25H-290 SAMPLES o>il N 9-1 i^ o "5 11 5.0 lcCL ECD '.:l:.-t::t'. MATERIAL DESCRIPTION LANDFILL 4" asphalt concrete over 8" base over moist, dark grayish brown, silty clay withsand - f — Becomes yellowish brown _ SANTIAGO FORMATION\Loose. moist olive gray silty davev SAND fSC-SM)r . Bottom of boring at 1 1 feet vn><7UICS> ^c 5 05o T3Q. 'w a)O O REMARKS AND OTHER TESTS Figure C-10 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring IB10 Sheet 1 of 1 Uate(s) OM Q/AODrilled HMW* Drilling Method Hollow Stem Auger Dnii Rio /*uc TCType CME75 j r\ kj j Not oncountorod Backfill'6 Bentonite chips LoggedBy Drill BitSize/Type DrillingContractor SamplingMethod(s) Location D. Kirkman 6" Tri-County Drilling SPT Checked j Wer|e 7?DID2plh 110 feetof Borehole ' ' -w lwl Approximate 11 onSurface Elevation -110-" Hammer i-ma/^n"Data i*«»wou See Site Plan „ T7\ 5) Q ffi - -315 5- -310 10- - -305 15- -300 20- -295 25- -290 SAMPLES ^ Mt^ z S 10-1 i^ i_ 8 M Is CQ.fi 35 o o o. SO • MATERIAL DESCRIPTION COVER FILL 4" asphalt concrete over 1 ' base over moist, dark grayish brown, sandy clay withsilt, gravel and plastic LANDFILLMoist, dark olive brown, silty clay with sand, gravel, and plastic - - SANTIAGO FORMATION Dense, moist, light gray with yellowish brown staining, silty clayey SAND (SM-SC) . Bottom of boring at 1 1 feet - - - - - - - -? — • || 5o fia. f £•m O &O REMARKS AND OTHER TESTS Vfn^ Figure C-11 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring IB11 Sheet 1 of 1 Date(s)Drilled Drilling Method 3/7/02 Hollow Stem Auger D-£JeR'9 CME 75 Groundwater Level ^Qt er)COuntered BoreholeBackfill Bentonite chips Logged By Drill Bit Size/Type Drilling Contractor Sampling Method(s) Location D. Kirkman 6" Tri-County Drilling SPT Checked j Wer|e Total Depth 2Q fl - tof Borehole *u'° reet Approximate •»•«•*«:Surface Elevation J10-° Hammer 1 ana/on-Data I*WHHOU See Site Plan c",o "5 £ ^0) 0)0) 0- -310 5- • 305 10- -300 15- -295 20- -290 25- -285 30- SAMPLES <D £ z S 11-1 0)Q- 01 m£ 33 D)O_J O Q.at O MATERIAL DESCRIPTION COVER FILL4" asphalt concrete and base over moist, dark brownish gray, gravelly sand Moist, dark greenish gray, sandy clay LANDFILL_ Moist, dark grayish brown, silty clay - ^ — Becomes black, organic rich with plastic, cloth ar>d wood - - - SANTIAGO FORMATION Dense, moist, light gray, silty SAND (SM) . Bottom of boring at 20 feet - - - s| So •5Q. <D O O REMARKS AND OTHER TESTS V«V«ff« Figure C-12 «/Cla9 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Date(s) imn-yDrilled *'«« ESS Hollow Stem Auger ^JeRig CME 75 Groundwater Level Mot encounteredand Date Measured ™Mi WIU.WUMWIOU Backfill BentonHe chips co "co £ ID'S S"®Ui3 Q.S 310 5- 305 10- -300 15- -295 20- -290 25- -285 SAMPLES <D.Q S 12-1 CDQ. o"o 27 O)o .0 Q.(D O Log of Boring IB1 2 Sheet 1 of 1 Logged D Kjrkman Drill Bit -„Size/Type ° Contractor Tri-County Drilling Sampling SPT Checked j Wer|e Total Depth -n c f.a(of Borehole lu.areei sSrfaS'Etevation 314-5 Hammer -tAratfaQ"Data "HHW Location See Site Plan MATERIAL DESCRIPTION COVER FILL4" asphatt concrete over, moist, dark greenish gray, gravelly sand Moist, medium brown, silty clay with sand LANDFILL_ Moist, dark greenish gray, silty clay with sand, plastic, cloth and wood _ . SANTIAGO FORMATION Medium dense, moist, light gray with yellowish brown staining, silty SAND (SM) Bottom of boring at 10.5 feet W1DO WaterContent, %D. "(Ac(D O £•Q REMARKS AND OTHER TESTS Figure C-13 Project: Palo mar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring Sheet 1 of 1 LB1 Date(s) 2M4/Q7Drilled <n*t« MeS Hollow Stem Auger Drill Rig rMP TRType CME75 Groundwater Level ».,.4 „„,««. ,»*.M,4and Date Measured Not encountered KS'e Bentonlte chips LoggedBy Drill Bit Size/Type Drilling Contractor SamplingMelhod(s) Location D. Klrkman 6" Trl-County Drilling SPT Checked j Wer)e Total Depth .. * n ,__.of Borehole 11-0 feet Approximate 71 A nSurface Elevation •"*•" Hammer 140#/30.. See Site Plan c.g eo £ > *_• O j~.JD o> a, o> 0- -310 5- -305 10- -300 15- -295 20^ -290 25- -285 30- SAMPLES o 1 £l 3 1"1 « 25 o Q.(D O '4:-f /!•'•• MATERIAL DESCRIPTION FILL . 3" asphalt concrete over moist, greenish gray, silty clay with sand • f — Becomes dark grayish brown f — Becomes yellowish brown - _ SANTIAGO FORMATIONXMedium dense moist light gray, silty SAND fSM) f _ Bottom of boring at 1 1 feet - - . - - SS "E >O D. '«c O Q REMARKS AND OTHER TESTS Vn>C" Figure C-14 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB 2 Sheet 1 of 1 DrS1 2/14/02 B?"ed D.Kirkman SSa Hollow Stem Auger g^pe *" Type*"9 CME75 Contractor Trl-County Drilling Groundwater Level Mnt onroi,n*»,»H Sampling «„,and Date Measured Not encoumerea Method(s) ar ' Checked j Wer|e Total Depth 1 -intentof Borehole M.UTBBI SuS^Bevation 314"° Eg"11" 14WW30" Backfill19 Bentonite ch|Ps Location See Site Plan _g <D Q) C) <P 0- 5- -305 10- -300 15- -295 20- -290 25- -285 30- SAMPLES <5il oQ. in 25 Graphic LogS ? ii •:' MATERIAL DESCRIPTION COVER FILL3" asphalt concrete over moist, yellowish brown, sifty clay with sand LANDFILL_ Moist, dark gryish brown, sandy day with wood debits _ SANTIAGO FORMATION Medium dense, moist, light gray with yellowlish brown staining, silty fine SAND . Bottom of boring at 1 1 feet WaterContent, %Q. '« ®a a REMARKS AND OTHER TESTS ¥fl>^ Figure C-15 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB 3 Sheet 1 of 1 Drilled' 2/14/02 By"^ D- Kirkman Method Hollow Stem A°9er sSe/Type 6" D;p l e Ri9 CME75 Sector Tri-County Drilling (jFOUnQWcltfif L-&VQI Klrtt Anr+mintAFfiH OafTlplInQ OPTand Date Measured ™°l encounwroa Method{s) 3r ' Backfill16 Bentonite chips Location See Site Plan Checked j Wer)e Total Depth 11 of .of Borehole 11-0 feet Approximate IIA«;Surface Elevation -31*-3 Hammer 140#/30» co "ro £> *- o.*-Q> <D (D O UJ^ QJ2 -310 5- -305 10- -300 15- -295 20- -290 25- -285 SAMPLES 0)il s 3"1 i O) ot>m£ 21 Graphic LogMATERIAL DESCRIPTION FILL 3" asphalt concrete over 7" base over moist, yellowish brown, silty day SANTIAGO FORMATION _ Medium dense, moist, light gray, silty SAND (SM) . Bottom of boring at 1 1 leet ^"H i° "GQ- c D &O REMARKS AND OTHER TESTS Figure C-16 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring Sheet 1 of 1 LB4 Date(s) 2/14/02Drilled *"*<« MethS Hollow Stem Au9er »•«• CME75 SRSXSZ& Not encountered gaS?8 Bentonite chips Logged By Drill Bit Size/Type Drilling Contractor Sampling Method(s) Location D. Kirkman 6" Tri-County Drilling SPT Checked j Werie Tf°Lal DKpfh 6.0 feetof Borehole "'" """ Approximate ,1A -Surface Elevation *'*•* Hammer 140#/30.. See Site Plan .g 15 £> *- Q.*-0) 0) <D 0) UJ£ Q£ o- -310 5- -305 10- -300 15- -295 20- -290 25- -285 30- SAMPLES oil ^ " 0Q. at5^0 0m£ 29 enO o j=D.CO O MATERIAL DESCRIPTION FILL 2" asphalt concrete over moist, yellowish brown, sitly clay with sand SANTIAGO FORMATION Medium dense, moist, light gray, silty SAND (SM) - . Bottom of boring at 6 feet - - - - - £ si2§§0 "5CL £mc4) O £•O REMARKS AND OTHER TESTS YffDCf Figure C-1 7 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 3S&} 2/14/02 BShSl Hollow Stem Auger TyJIeRi9 CME 75 and Date Measured ^°* encount6rcc* iSm6 Bentonlte chips .0 TO £ (Dm dj Q) 0- -310 5- - -305 10- - -300 15- -295 20- -290 25- -285 30- SAMPLES •° S N 5-1 o>Q. V) o~o 53 o>o u Q.(0 Log of Boring LB 5 Sheet 1 of 1 Logge Q Kjr|<man Drill Bit ... Size/Type ° cSctor Tri-County Drilling Sampling -DTMethod(s) &K1 Location See Site Plan Checked j.Werle Total Depth ,n - *__,ofBorehble 20.5 feet Approximate i+AnSurface Elevation •3I*-" Hammer tAi^ntn"Data 140#/30 MATERIAL DESCRIPTION COVER FILL 4" asphalt concrete over 8" base over moist, grayish brown, sllty clay with sand LANDFILL Moist, greenish gray, silty clay with ceramic chips, rubber, metat --- - f— Becomes yellowish brown r- ~ - - - ^— Becomes reddish brown - - SANTIAGO FORMATIONVery dense, moist, gray with yellowish brown staining, silty SAND with calcite crystal layers (SM) - Bottom of boring at 20.5 feet . - YYDC "c 11 tia. 'mca>D O REMARKS AND OTHER TESTS Figure C-18 Project Project Project : Palomar Airport Center Location: Carlsbad, California Number: 58-00111062.00000 Log of Boring Sheet 1 of 1 LB6 \^/ on j/n*?Dnii GQ Drilling Method Type Hollow Stem Auger CME75 Groundwater Level M_» .,«,.„.. n*a«r4j r\ HJ j nioi GficounicrBu Backfill Bentonite chips LoggedBy Drill Bit Size/Type Drilling Contractor Sampling Merhod(s) Location D. Kirkman 6" Tri-County Drilling SPT Checked By Total Depth of Borehole J. Werie 5.0 feet Approximate «.. » Q Surface Elevation Data See Site Plan c"o 1 =£> *- Q.*-(DO) (DO) LU^ O£ 0- -310 5- -305 10- -300 15- -295 1 20- -290 25- -285 30- SAMPLES o » E ^1 o3 Q. (O o"om£ Olo o £Q.ro O MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over 6" base over moist, yellowish brown, silty clay . LANDFILL Moist, dark brown, silty clayey with rubber, cloth " . Bottom of boring at 5 feet . - - - - - - - - ^c fcS |o3o *GQ. & vt 0>o tO REMARKS AND OTHER TESTS vvnc* F'9ure c'19 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB 7 Sheet 1 of 1 DriE? Z'14'02 B?"^ D.Kirkman MethS Hollow Stem A"9er sSe^ype 6" Typ^?'9 CME75 Contractor Tri-County Drilling Groundwater Level Not -neountered Samplingand Date Measured Not encounierea Method(s) BackfiS'6 Bentontte chips Location See Site Plan Checked j Wflr|e Total Depth K n fM. of Borehole 5-° feet Approximate ~^ . nSurface Elevation l3m-u riamm6r <tjmj*/^n»Data 14WW30 co 5*- fL-— 9* ID 4} 0- -310 5- -305 10- -300 15- -295 20- -290 25- " -285 SAMPLES il L. Q. o"o o o JTQ.Eo MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over 8" base over moist, yellowish brown, sitty day with sand LANDFILL Moist, dark grayish brown, silty clay with sand, plastic . Bottom of boring at 5 feet TUMPU1O si |oSo *GD. c01o Q REMARKS AND OTHER TESTS Figure C-20 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB 8 Sheet 1 of 1 D*kS) 2'14">2 B?99ed D.KIrkman BBS Hollow Stem Auger g**,. r °y CME75 gSfrictor Tri-County Drilling SSSSSiSi No. encountered g-gjjj, Checked j Wer|e Total Depth . Q , tof Borehole 4'u leel Approximate -.,.. nSurface Elevation *14-u Hammer lArntnn*Data 140#/30 Backfill19 Bentonitc ch'Ps Location See Site Plan o 1 f^ *•• O i -(DO) 0) <D uj£ a£ 0- -310 5- -305 10- -300 15- -295 20- -290 25- -285 30- SAMPLES a> 0 f£i & OT •^Sco£ O)o o!ca.(0 O MATERIAL DESCRIPTION COVER FILLAsphalt concrete over base over moist, yellowish brown, sitty clay . LANDFILLMoist, dark grayish brown, sitty clay with ceramic fragments, plastic _ Bottom of boring at 4 feet - - - - - - - - vnscp VCW9 - - ^"c£fi|o5o t>Q. 3?« V Q tQ REMARKS AND OTHER TESTS Figure C-21 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB Sheet 1 of 1 9 SB* *"« MeS Hollow Stem Auger Drill Rig pup 75Type UMK /3 * n . • + i Not oncountorodand Date Measured WMWMIHWIWW oalS?6 Bentonite chipsDaQKTIll ' Logged By Drill Bit Size/Type Drilling Contractor Sampling Method(s) Location D. Kirkman 6" Tri-County Drilling SPT Checked By Total Depth of Borehole J. Werle 6.0 feet Approximate 314 5Surface Elevation °'*-° Hammer 4,uuutn"Data I*HHHW See Site Plan co "S £> »j Q.*-(DO) d) *ai£ Q^ 0- -310 5- -305 10- -300 15- -295 20- -290 25- -285 30- SAMPLES • I£i S 9~1 £ m£ 30 Graphic Log'§l'$'$. MATERIAL DESCRIPTION FILL2" asphalt concrete over moist, yellowish brown, silty day SANTIAGO FORMATION_ Dense, moist, light gray with yellowish brown staining, silty SAND (SM) _ , Bottom of boring at 6 feet - _ _ - - # £.1|S5o tsQ. .-&« <UOe-o REMARKS AND OTHER TESTS vvncp Figure c'22 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Drilled 2/14/02 MeS Hollow Stem Auger LJnH rtlQ /tfcflc "reType CME75 Groundwater Level M_» ____.. _t«.«..4and Date Measured ° encountered Back™6 Bentonfte chips co ra fi .o> "53 a)"® 0- -310 5- -305 10- -300 15- -295 20- -290 25- -285 30- SAMPLES IDXI £" Z 9 1°-1 k. CL in fflO 61 o o Q. CO O Log of Boring LB10 Sheet 1 of 1 Logged D Kirkman Drill Bit fi..Size/Type cSictor Tri-County Drilling Sampling CDTMethod(s) &KI Location See Site Plan Checked j Wer|e Total Depth -tRnf«tof Borehole ' °'u TeBl Approximate 3135Surface Elevation ° '-3-0 Hammer 140#/30« MATERIAL DESCRIPTION COVER FILL 4" asphalt concrete over 6" base over moist, yellowish brown, silty clay . LANDFILL Moist, dark grayish brown, silty clay with wire, plastics - - - - — ' SANTIAGO FORMATIONVery dense, moist, light gray, sitty fine SAND (SM) - Bottom of boring at 1 6 feet - - - - YfDO •-1 So a. inc:toO O REMARKS AND OTHER TESTS Figure C-23 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB11 Sheet 1 of 1 LJ3Io(Sj OM^tinO LOQQOQ f* tfmrtr*w+f*r%Drilled */i<wu* oy u. rvirnnian MeS Hollow Stem AtJ9er s£?ype 6" ?£peRig CME 75 CcXactor Tri-County Drilling Groundwater Level N t encoun»ered Samplingand Date Measured NOt encountereo Method(s) Backfill'6 Bentonlte chips Location See Site Plan Checked j w ,by Total Depth . , , .of Borehole 4.5 feet Approximate ,1 . nSurface Elevation Data *H»HOU jj) 0) a) tp - - -310 5- -305 10- -300 15- -295 20- -290 25- -285 SAMPLES m -SII <DQ. ^S X'1 o a.n O MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over 8" base over moist, yellowish brown, silty day LANDFILL Moist, greenish brown, silty day with wire, plastic, cloth ^ Bottom of boring at 4.5 feet a* +j vS 1°50 •*3 a. -^•*^ c O D REMARKS AND OTHER TESTS Figure C-24 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB1 2 Sheet 1 of 1 Drilled3* 2/14/02 By"ed D" Klrkman %S& Hollow Stem Auger §£*,. 6" ?;p'eRi9 CME75 S|ctor Tri-County Drilling StSOS^A Not encountered gggg Checked j_ Wer|e Total Depth - n tl^tofBorehble 3.0 feet Approximate ~.A nSurface Elevation J14-u Hammer iinuinnnData 140J/30 Backfi?6 Bentonite cn'Ps Location See Site Plan co « £ <D <D fl) 0) o- -310 5- -305 10- -300 15- -295 20- -290 25- -285 30- SAMPLES o Q)Q. co S"6 ,o Q.2 O MATERIAL DESCRIPTION COVER FILL 4" asphalt concrete over 6" base over moist, yellowish brown, silty clay . LANDFILL Moist, dark grayish brown, sitty clay with ceramic fragments, plastic.metal . Bottom of boring at 3 feet YTDC WaterContent, %Q, 'm <DQ Q REMARKS AND OTHER TESTS Figure C-25 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB13 Sheet 1 of 1 8Si8) z™02 Method Hollow Stem Au9er ™™* CME75 SSSKSA ^t encountered BaSfiS'6 Bentonite chips L°99ed D Klrkman Dnll Bit -„ Size/Type CoSictor Tri-County Drilling Sampling Method(s) Checked j Wer,e Total Depth - Q f . of Borehole 5'° feet Approximate ,- ., nSurface Elevation 1>1*'u g*Smer 14W/30" Location See Site Plan _ c .2to £ <D <p a) <i> UJ.£ O.SJ 0_ - -310 — -305 10- -300 15- -295 20- -290 25- -285 M_ SAMPLES £ 0> "cQ- 5 I- Z 0 Q. (A oBm£ O)o .y Q.eo MATERIAL DESCRIPTION COVER FILL 4" asphalt concrete over moist, vellowish brown, siltv clav LANDFILL Moist, dark grayish brown, silty clay, with trash - . Bottom of boring at 5 feet • - •J - - - - „ _.- o£« §5o -J5 CL, ^>n 'toc0) Oe-o REMARKS AND OTHER TESTS — ._ VffM« F'9ure C'26 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB14 Sheet 1 of 1 gSS> 2/14/02 uXSl Hollow Stem Auger ?JP'eRi9 CME75 253SXZ& Not encountered eSS18 Bentonlte chips Logged By Drill Bit Size/Type Drilling Contractor Sampling Method(s) Location D. Kirkman 6" Tri-County Drilling SPT Checked j Wfir|e Total Depth - n ,_„,of Borehole 6.0 feet Approximate -,1 . nSurface Elevation Jl^'u Hammer 140#/30- See Site Plan .0 ra £> *- O.*-<b ffl a) d)LU£ o£ 0- -310 5- -305 10- -300 15- -295 20- -290 25- -285 30- SAMPLES « ^ II N 14-1 I S"om£ 43 Graphic LogMATERIAL DESCRIPTION FILL 2" asphalt concrete over motst, dark grayish brown, silty sand . SANTIAGO FORMATIONHard, moist, light gray with yellowish brown staining, SILT (ML) with sand - - . Bottom of boring at 6 feet - - - - - - - - - £ cu£ 1°§0 "o CL £•(ACOae-o REMARKS AND OTHER TESTS WWV%fm Figure C-27 «ffll«9 Project: Palomar Airport Center L Of Boring LB15 Project Location: Carlsbad, California Project Number: 58-00111062.00000 Sheet 1 of 1 gJJ<J> 2/14/02 ky99ed D. Kirkman g*** J. Werle Drilling nn|iow Stem Aimer Dn'" Bit 6" Total DePtn 1 1 fl fortMethod Hollow Stem Auger SizefType e of Borehole 1 1 -° teet Drill Rig ruc 7c Drilling Tri.rn..«H, nruiinn Approximate ,.. . nType CME 75 Contractor Tn-County Drilling &Ret* Elevation 314-° Groundwater Level Mft» ____.. _»_„,! Sampling CDT Hammer 1,*rM*y»n»and Date Measured Not encountered Method(s) SPT Data 140W30 Backfi?6 Bentonrte chiP* Location See Site Plan co to £> .^ Q.*-0)0) (D d> HIS Qfi o~ -310 5- -305 10- -300 15- -295 20- -290 25- -285 30- SAMPLES • 1£i S i=-il^ S U)IsCQ£ 43 Graphic LogH •! -^ •; " •:• •'• MATERIAL DESCRIPTION FILL4" asphalt concrete over 1 " base over moist, yellowish brown, silty clay : : - . SANTIAGO FORMATIONDense, moist, greenish gray, silty fine SAND (SM) ~ — . Bottom of boring at 1 1 feet - - - - - -WaterContent, %•cCL _>> 'wc0>O frQ REMARKS AND OTHER TESTS vn>^ F'9ure c'28 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB16 Sheet 1 of 1 OriSi? 2/14/02 MeB Hollow Stem A"9er LJnU r\KI ^»n*t ~reType CME75 GrOUnOWater Level Unt nnrnnntcroHand Date Measured "m w"*-u«"««*su £38" Bentonlte chips Logged D Kjrkman Drill Bit R.. Size/Type ° Contractor Tri-County Drilling Sampling Location See Site Plan Checked j Wer|e Total Depth 5 Q f , of Borehole 5-u teet Approximate ,1 * 0Surface Elevation "* Hammer 4 tn-ttntt"Data 140#/30 c",g ^ *•* CL*-* 0- -310 5- -305 10- -300 15- -295 20- -290 25- -285 1 30- SAMPLES 0 ^ 0Q. ll Olo o JZQ.CD O MATERIAL DESCRIPTION FILL 4" asphalt concrete over 1" base over moist, yellowish brown, sandy silt - Bottom of boring at 5 feet - - - - - - - - YTDO - - -WaterContent, %CL CoQ D REMARKS AND OTHER TESTS Figure C-29 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB17 Sheet 1 of 1 gas) »i«2 823, Hollow Stem Auger ?J«B CME75 SKSSZ& Not encountered iSS* Bentonfte chips Logged By Drill BitSizePType DrillingContractor Sampling Method(s) Location D. Kirkman 6" Tri-County Drifting SPT Checked j Wer|e Total Depth - n ,__tof Borehole 6-° feet Approximate ,.. . - Surface Elevation •5I^3 Hammer 140#/30» See Site Plan c.0 > *- Q.-h*1> <D 0) O - -310 5- 305 10- 300 15- 295 20- -290 25- -285 SAMPLES ,_ * 1 £ z 8 17-1 <DQ.tn5*--S 30 S1 _lo Q. O MATERIAL DESCRIPTION FILL 4" asphalt concrete over 8" base over moist, yellowish brown, sandy silt SANTIAGO FORMATION Very stiff, moist, light gray, sandy SILT (ML) . Bottom of boring at 6 feet - - - • - - - - - t5 j_; v£ So§0 Q. >; 'inc O Q REMARKS AND OTHER TESTS ••MM Figure C-30 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB18 Sheet 1 of 1 3Sff 2>™02 MethS Hollow Stem Auger Drill Rig rME 75Type CMt 75 ZS5SHS£& Not encountered BaSfiS'6 Bentonrte chips Logged By Drill Bit Size/Type Drilling Contractor SamplingMethod(s) Location D. Kirkman 6" Tri-County Drilling SPT Checked j Wer,e Total Depth iGOfeetof Borehole ie.0 feet Approximate i-ncSurface Elevation •*1** Hammer 140#/30« See Site Plan oX! -ffi £ <u 15 §"ti) 0- -310 5- -305 10- -300 i -295 20- -290 25- -285 SAMPLES 0 0) "° « N 18-1 &to5*-5 0 71 O)o .0 Q.CO O MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over 6" base over moist, yellowish brown, silty clay with sand - - LANDFILL Moist, black, silty clay, with plastics and organics " - SANTIAGO FORMATION Very dense, moist, light gray, silty fine SAND (SM) . Bottom of boring at 16 feet - - - si »0 Q. "5c 0>Q Q REMARKS AND OTHER TESTS Wf*M" Figure C-31 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB19 Sheet 1 of 1 Daje(s) 2/1 5702 MetiS Hollow Stem Auser Type CME 75 Groundwater Level k,_. __„_., _»A-a,iand Date Measured No* oncounierea BackS* Bentonrte chips Logged D> Kirkman Drill Bit -„Size/Type ° SSctor Tri-County Drilling Sampling CDTMethod(s) ari Location See Site Plan Checked j Wer|e Total Depth i35fP6tof Borehole 13.5 feet Approximate *** gSurface Elevation * ' Hammer - Anttnn"Data IWH-SU co '•5 £ > *- Q.-4-(DO <D <DUJ.fi 0.2 -310 5- -305 10- -300 15- -295 20- -290 25- -285 SAMPLES <E CD f ^ i S 19-1 S v> 50/5' _j .0 Q.CD O ;-?:;:; MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over 1' base over moist, yellowish brown, silty clay LANDFILL_ Moist, dark gray to black, clay with sand, plastic, organics _ f — Becomes greenish gray SANTIAGO FORMATION Very dense, moist, light gray, silty fine SAND (SM) Bottom of boring at 13.5 feet VTDO i| 5°§0 Q. C0)Q O REMARKS AND OTHER TESTS Figure C-32 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB20 Sheet 1 of 1 Date(s) 7/15/02Drilled *nw«« SS Hollow Stem Auger ^ CME75 S?E£&|££ Not encountered BBS* Bentonite chips Logged D Kjrkman Drill Bit RHSize/Type ° cXictor Tri-County Drilling SamplingMethod(s) Checked j Wer|e Total Depth - n fo~»of Borehole 5-° teet Approximate t-te nSurface Elevation '3IO-U Hammer tArmttn»Data 140#/30 Location See Site Plan c.0 tt>"!p Q)"0) LUiffi O«ffi -305 10- -300 15- -295 20- -290 25- SAMPLES -° Q. en3*. 5 0 o o JZQ.TO 6 MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over base over moist, yellowish brown, silty clay LANDFILLMoist, dark aravish brown, siltv clav with plastic . Bottom of boring at 5 feet - - - - II Q. 'v> 0)O O REMARKS AND OTHER TESTS vvnc- R9ure c'33 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB21 Sheet 1 of 1 Sds> ™°* MetS Hollow Stem Auger «,»<> CME75 2S8SSS1S& No, encountered BaSf* Bentonlte chips Logged By Drill BitSize/Type Drilling Contractor D. Kirkman 6" Tri-County Drilling Sampling Method(s) Location Checked j Wer|e Total Depth - Q ,.of Borehole D u Teet Approximate -11 e nSurface Elevation -*13-" Hammer tArntitn"Data 14MH30 See Site Plan c".0 "co £-*1 +j Q *JQ) QJ Q\ flj -310 5- -305 10- -300 15- -295 20- -290 25- SAMPLES 0) l! 0)Q. CO -9° O O Q. 03 O MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over moist, yellowish brown, silty clay LANDFILL Moist, dark grayish brown, silty clay with plastic, cloth . Bottom of boring at 5 feet - - - - "E •GQ. 'inc.IDQ O REMARKS AND OTHER TESTS VVV^tfB Figure C-34 r Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB22 Sheet 1 of 1 jg£g> 2/15/02 ^W"1 D.Kirkman SBa Hollow Stem Auger gj™^ 6" T^ CME7S cSlctor Trl-County Drilling Groundwater Level WAt Anrrtlint«™ri Samplingand Date Measured Not encountered Method(s) Checked j Wer|e Total Depth s fl f . of Borehole 5>0 feet Approximate ti*>oSurface Elevation ** u Hammer 140#/3Q.. BackfS'6 Bentonlte cWp« Location See Site Plan .g "to £ Q) fl> Q) 0} -305 10- -300 15- -295 20- -290 25- SAMPLES ll at ll o>o .0 Q. O MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over moist, yellowish brown, stlty clay with sand LANDFILL Moist, dark grayish brown, siltv clav with plastic _ Bottom of boring at 5 feet TfDC if§0 a 'u>ca>Q O REMARKS AND OTHER TESTS Figure C-35 r- s Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB26 Sheet 1 of 1 DriEf 2/15'02 B?"ed D' Kirkman SBS Hollow Stem Auger g^pe •" Drill E3in flriMinn — . Type CME 75 Contractor Tr'-C°unty Drilling Groundwater Level Nftt ftncountararf Samplingand Date Measured Not »ncoun™reo Method(s) Qg^Jj16 Bentonite chips Location See Site Plan Checked j Wer|e Total Depth 5 Q f tof Borehole 5'D Teet sSKT^vation 315-5 Hammer 140#/30» co '« £ J1J © <j) <D o- -315 5- -310 10- -305 15- -300 20--295 25- -290 30- SAMPLES S 0 f ? = oQ. at ||Graphic LogMATERIAL DESCRIPTION COVER FILL4" asphalt concrete over 6" base over moist, dark grayish brown, silty sand with gravel Moist, yellowish brown, silty clay LANDFILLMoist, dark aravish brown, siltv clav with sand, elastic, ceramic fragments . Bottom of boring at 5 feet WaterContent, %Q. '« 01O e- Q REMARKS AND OTHER TESTS Ym^ Figure °"39 Project: Patomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB27 Sheet 1 of 1 Date(s) 9/1 K/n?Drilled aiwtf. Method Hollow Stem Auger L/nll r\lQ f*ntc TEType CME75 Groundwater Level u_. ._„_., -*-..,iand Date Measured Not encountered £38* Bentonfce chips Logged D Kjrkman Drill Bit .«Size/Type ° cSlctor Tri-CountyDrming SamplingMethod(s) CheckedBy Total Depthof Borehole J. Werle 5.0 feet Approximate 3155Surface Elevation ° ' °'a Hammer i-mann-Data I-HWMU Location See Site Plan c.2 CD -^ <D <p 0 <D -315 -310 10- -305 15- -300 20-H -295 25- -290 SAMPLES &£1 h Graphic LogMATERIAL DESCRIPTION COVER FILL4" asphalt concrete over 2' base over moist, yellowish brown, sitty clay with sand LANDFILLMoist, dark aravish brown, siltv clav with sand, olastic and alass . Bottom of boring at 5 feet "c Is Dry Density, pcfREMARKS AND OTHER TESTS WWW%C* F'9ure C-40 UJKd Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 gK> 2/15/02 £— D.Kirkman MeS "CHOW Stem Auger g^ 6" TySeRi9 CME75 C±Ictor Tri-County Drilling Groundwater Level Mr»t»nrnnnt«mH Sampling »«.and Date Measured Nm encounwrea Method(s) SKI Backfill16 Bentonite ch|Ps Location See Site Plan Log of Boring LB28 Sheet 1 of 1 Checked j Wer(e Total Depth c n , __» ofBorehble 6'0feet Approximate 3155 Hammer ^^^ c.9 <0 ID QJ Q) LuJ* O.2 -315 5--310 10--305 15- -300 20- -295 25- -290 SAMPLES i! S 28-1 & -2?m*f 8 .g aCD O MATERIAL DESCRIPTION COVER FILL 2" asphalt concrete over 4" base over moist, yellowish brown, silty clay . LANDFILL Moist, black, organic, silty day with sand SANTIAGO FORMATION _ Stiff, moist, yellowish brown SILT with fine sand (ML)- _ Bottom of boring at 6 feet VVB0UICo WaterContent, %13Q. C O D REMARKS AND OTHER TESTS Figure C-41 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB32 Sheet 1 of 1 Drilled * 2/15/02 By"ed D. Kirkman MethS Hollow Stem Au9er SizeH-ype 6" Typ^T*9 CME 7S Contractor Tri-County Drilling Groundwater Level N . enCfMinter-H Samplingand Date Measured Not encountered Method(s) Bv <J- Werle Total Depth 5 - -,of Borehole s'u Teet Approximate nunSurface Elevation 0)0lU Hammer lAtutnn"E-I«*« TtUfr/^J"LJ313 Backfilf6 Bentonrte chips Location See Site Plan c"o 1*- -"_^"53 w"y 0- -315 5- -310 -305 15- -300 20- -295 25- -290 30- SAMPLES -°(A O>o oIcQ.(0 6 MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over 6" base over moist, yellowish brown, silty clay . LANDFILL Moist, dark grayish brown, silty clay, with sand Bottom of boring at 5 feet I*15 Q. "wcVD D REMARKS AND OTHER TESTS WH%*ff figure C-45 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB33 Sheet 1 of 1 gSffi> 2/15/02 ^96d D.Kirkman SJJB Hollow Stem Auger §««. 6" %%** CME75 gSlctor Tri-County Drilling SSSSSSiSA Not encountered gng^ spT Checked j Wer|e Total Depth 11 Qf .of Borehole 11.0 feet Approximate ,-K «Surface Elevation •Jlt>'u SIS'"6' 140#/30" BackSS'6 Bentonlte chips Location See Site Plan c"o 'ro £> *- Q.*-(t> 0) a) 0} IU.S OJB o- -315 5- -310 10- -305 15- -300 20^ -295 -| 25^ -290 30- SAMPLES 0) « t £! S 33-1 a 33-2 £in IBm£ 10 54 eno_jo JZ Q.CD O MATERIAL DESCRIPTION FILL 2" asphalt concrete over moist, yellowish brown, silty clay with sand Moist, reddish brown and yellowish brown, silty fine sand and sandy silt with roots - - f — Becomes dark brown - - - SANTIAGO FORMATION Very dense, moist, light gray, silty fine SAND (SM) _ . Bottom of boring at 1 1 feet $e s|5°5o •Go. >i 'incoa ta REMARKS AND OTHER TESTS WTD^P F'9ure c>46 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB34 Sheet 1 of 1 ft® w«« MethS Hollow Stem A"9er ^ CME75 ZSSaSZA Not encounter BBS?* Bentonrte chips Logged By Drill Bit Size/Type Drilling Contractor SamplingMelhod(s) Location D. Kirkman 6" Tri-County Drilling SPT Checked j Wer|e Total Depth ,- n ,„ .of Borehole 26.0 feet Approximate 11 enSurface Elevation <>1D-U Hammer 140#/30« See Site Plan c" m £ <o o> Q) o -315 5- 310 10- -305 15- -300 20- -295 25- SAMPLES 0) * £ z Si 14 1s O. (Os*-J>o 35 B' o a O MATERIAL DESCRIPTION LANDFILL 4" asphalt concrete over 1' base over moist, dark grayish brown to black, silty claywith sand, gravel, plastic, trash -f — Increase in trash - - - - - - - - SANTIAGO FORMATIONDense, moist, light gray with yellowish brown staining, silty fine SAND (SM) - . Bottom of boring at 26 feet s|£05o r>CL £, m oa (?O REMARKS AND OTHER TESTS - V¥V*C" Figure C-47 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB23 Sheet 1 of 1 Date(s) 2/15/02Drilled *nw»" ESS Hollow Stem Auger Drill Rig CM- 7fiType UMt /a Groundwater Level Mftt ftnf «nntowiriand Date Measured Not «n«untered taddin* Bentonite chips LoggedBy Drill BitSize/Type DrillingContractor Sampling Method(s) Location D. Klrkman 6" Tri-County Drilling SPT Checked j Wer,e Total Depth - „ ,„.of Borehole 6.0 feet Approximate -ncnSurface Elevation •>1*u Hammer 140#/30- See Site Plan co w £ — 9* * 9* - -310 5- - -305 10- -300 15- -295 20- -290 25- SAMPLES u. £ 2 ™ £ to •isCQ.H 20 S" o a.(D O : • MATERIAL DESCRIPTION FILL 2" asphalt concrete over moist, yellowish brown, clayey silt with sand SANTIAGO FORMATIONDense, moist, light gray and yellowish brown, stlty fine SAND (SM) . Bottom of boring at 6 feet - - _ - i of §0§0 *5 a. >, c O O REMARKS AND OTHER TESTS mmm**m Figure C-36 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB25 Sheet 1 of 1 gjgjf* 2/15/02 |g?9Bd D.Kirkman ESS Hollow Stem Auger ™*«pe 6" ?jJJeR'9 CME 75 Contractor Tri-County Drilling Groundwater Level M_» -nrniin»,™H Samplingand Date Measured Not encountered Method(s) Checked j Wer]e Total Depth . 5 f .of Borehole 4-a Teel sErfS'Svation 315'5 Hammer 14Q«/30"Data Backfill16 Bentontte chips Location See Site Plan co CO *fr^r JD^ o>^i> -315 5- -310 10--305 15- -300 20-i-295 25--290 SAMPLES <D ll &in ^"5 O)o oic D-m O MATERIAL DESCRIPTION COVER FILL 4" asphalt concrete over 8" base over moist, dark grayish brown, silty sand with gravel , Moist, yellowish brown, silty clay - LANDFILL Moist, black, silty clay with sand, plastic, and organics Bottom of boring at 4.5 feet ^fcffl 5o Q. C0>D Q REMARKS AND OTHER TESTS Figure C-38 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB24 Sheet 1 of 1 Date(s) 2/15/02Drilled *"*<" gJ'JS Hollow Stem Auger ™?* CME75 SSSlOSiS^ Not encountered iSSS* Bentonrte chips LoggedBy Drill BitSize/Type DrillingContractor Sampling Method(s) Location D. Kirkman 6" Tri-County Drilling SPT Checked j Wer|e Total Depth IK «««,-*of Borehole 15.0 feet Approximate tienSurface Elevation •313-u Hammer 1dn*nn"Data i*w»JU See Site Plan co ~m fi> <- Q.*-*0) 0) 4) (D LUjffi Q,£ -310 5- -305 10- -295 20- -290 25- SAMPLES • 1fi S 24-1 oQ. V) IBm£ 70 O)o o!cQ.(D 6 MATERIAL DESCRIPTION COVER FILL 4" asphalt concrete over 6" base over moist, yellowish brown, clayey silt LANDFILL Moist, dark grayish brown, stlty clay, with glass, plastic, organics - SANTIAGO FORMATION Very dense, moist, light gray with yellowish brown staining, silty SAND (SM) - . Bottom of boring at 15 feet - _ £ cfe«>!§5o t5Q. >;«in 0) Q £•Q REMARKS AND OTHER TESTS Vff>^ F'9ure C'37 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 gjjjj) 2/15/02 MetlSl Hollow Stem Auger Drill Rig CHE 7SType CME75 Groundwater Level •.,„. •«-™into™riand Date Measured Not encountered iSS* Bentonrte chips cp CO £ >*- Q.+-JD <D (D a> o- -315 5- -310 - - 10- -305 - 15- 20- -295 25- -290 30- SAMPLES Q) ^ £l s 29~1 2. £0,8 75 Graphic LogLog of Boring LB29 Sheet 1 of 1 Logged D Kjrkman Drill Bit -..Size/Type CoXlctor Tri-CountyDrIUin9 Sampling ««- Method(s) ori Checked , \werieBy Total Depth 1 60 feetof Borehole lB.ot»et Approximate 11 KQSurface Elevation OIO<U Hammer 4 Arutitn"Data 140#/30 Location See Site Plan MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over 8" base over moist, dark gray, silty sand with gravel Moist, yellowish brown, silty clay LANDFILL Moist, dark grayish brown, silty clay with sand - - - - • f — Becomes yellowish brown • f — Becomes cfarfc grayish brown -- - f — Becomes blank and organic rich - f — Becomes yellowish brown SANTIAGO FORMATION Very dense, moist, light gray, silty SAND (SM) — . Bottom of boring at 16 feet • - - - • So§0 Q. "&>cffiO £•O REMARKS AND OTHER TESTS VVMM Figure C-42 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 BnSs) 2/15/02 53% HoHow Stem Auger T^Je**9 CME 75 Groundwater Level N_ encounteredand Date Measured Not encountered JJSSI?9 Bentonite chips co 1L ~~~fl>"3S <D^>ii i flu ft <DUP! ifi£ LJ *£- o- -315 5- -310 10- -305 15-i -300 20- -295 25- -290 30J SAMPLES Q> -° (Da. m o1$ O .0 ara O Log of Boring LB30 Sheet 1 of 1 Logged D Kjrkman Drill Bit 6« Contractor Tri-County Drilling Sampling Method (s) Checked J-War|e Total Depth = t\ «*.*.»of Borehole 5'0feet Approximate 11 enSurface Elevation -110-0 Hammer •\AMtnn"Data THWHOU Location See Site Plan MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over 6" base over moist, yellowish brown, silty clay , LANDFILL Most, dark grayish brown, silty clay, with sand and gravel Bottom of boring at 5 feet - - - - - - - - - || 0. 0)O O REMARKS AND OTHER TESTS VfnC" Figure C-43 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB31 Sheet 1 of 1 ^ ' 511 t\tt\^DnllQu Drilling Method Hollow Stem Auger LJflH rMu f**mf TBType CME75 Groundwater Level u_» -«.»«. ™*«M>»Iand Date Measured No encountered Borehole Backfill Bentonite chips Logged By Drill Bit Size/Type Drilling Contractor D. Kirkman 6" Tri-County Drilling Sampling Method(s) Location Checked j Wef|e Total Depth - D feetof Borehole 5-° ?eet Approximate ^IROSurface Elevation •}1D-U g|t^mer 140W30" See Site Plan co '•S £> +- Q.*-0> <D fl) <D UJ£ 0£ 0- -315 5- -310 10- -305 15- -300 20- -295 25^ -290 J 30- SAMPLES il &w %-sco£Graphic LogMATERIAL DESCRIPTION COVER FILL 4* asphalt concrete over 6" base over moist, yellowish brown, silty clay LANDFILL Moist, dark grayish brown, silty clay, construction soil . Bottom of boring at 5 feet - - 1 - - - ^+*si §0§0 "5o. &in <Da £•O REMARKS AND OTHER TESTS v*no Rgure c"44 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB35 Sheet 1 of 1 Date(s) 2/15/02Drilled *"»<" MeS Hollow Stem Auger "•«« CME75 SSWSiSA Not encountered BaSrS16 Bentonite chips Logged D Kirkman Drill Bit „ Size/Type ° cSfctor Tri-County Drilling Sampling Method(s) Checked j Wefle Total Depth e n »„,.» of Borehole 5-° fcet Approximate 71 enSurface Elevation '3ID-U Hammer 140#/3(r Location See Site Plan o « £> •»-» a.*-"03 0) <j) fl) 0- -315 5- -310 10- -305 15- -300 20- -295 25- -290 30- SAMPLES <Dil &in a>o o a.CO O MATERIAL DESCRIPTION COVER FILL 4" asphalt concrete over 8" base over moist, dark grayish brown, silty sand with gravel LANDFILLMoist, dark gray, silty day, with sand . Bottom of boring at 5 feet - - - - - - - - sf so a. '5IZa>O o REMARKS AND OTHER TESTS VVMM Figure C-48 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB36 Sheet 1 of 1 Drifted' 2/15/02 B?"ed D' *irkman MeS Hollow Stem Auger g^. •" ™j«» CME75 gSS^ Tri-County Drilling Groundwater Level No( cncountered Samplingand Date Measured Not encountered Methodfs) Checked j Wefte Total Depth snfootof Borehole 3'u Ieet Approximate 11 R nSurface Elevation OIO-U Hammer * »nMnt\*<Data 14W/30 Ba^fiil16 Bentonite chips Location See Site Plan co 5 £> *- Q.*-(DO) a> «> lU.fi 0£ 0- -315 5- -310 10- -305 15- -300 20- -295 25- -290 30- SAMPLES o 0) fQ- ^^ i d>a.o §0S£ O)o o JTa.(D O MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over 8" base over moist, dark grayish brown, silty sand with gravel LANDFILL Moist, dark greenish gray, silty day with sand . Bottom of boring at 5 feet VVV^CP%*n& ^ si5°5o •Go. s- V) <D O £•Q REMARKS AND OTHER TESTS Figure C-49 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Date(s) 9/15/02Drilled 2/15/02 Mete Hollow Stem Auger TTOeRi9 CME 75 Groundwater Level ^Oj encountered Backfill16 Bentonlte chips c_o TO *fi>** Q.._0} in 3) <p 0- -315 5- -310 10- -305 15- -300 20- -295 25- -290 30- SAMPLES ii Q)Q. .9 "3 CDO O JCQ.OJ O Log of Boring LB37 Sheet 1 of 1 Logged n if-i,P*J u* KirKman Drill Bit -.,Sizefiype ° cSmrictor Tri-County Drilling SamplingMethod(s) Location See Site Plan Checked j Wer|e Total Depth 15 5 foe*of Borehole 12.5 feet Approximate 317 QSurface Elevation -u Hammer 14W/3o» MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over 8" base over moist, dark grayish brown, silly sand withgravel Moist, yellowish brown, stlty clay . LANDFILLMoist, dark greenish gray, silty clay with sand — - - SANTIAGO FORMATIONDense, moist, yellowish brown, clayey SILT with fine sand (ML) Bottom of boring at 12.5 feet - - - - - . roe . || 5o "GQ. c o o REMARKS AND OTHER TESTS Figure C-50 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB38 Sheet 1 of 1 Date(s) 2/15/02Drilled ZTI5HW MeSS Hollow Stem Auger ™eR* CME75 SfSSaSZA Not encountered gSSj* Bentonite chips Logged D Kirkman Drill Bit -„ Size/Type ° cSictor Tri-County Drilling Sampling Method(s) Checked j Wftr|e Total Depth 5 „ f .of Borehole a-° Teet Approximate ,.., -Surface Elevation J1'-° g^mer 140*30- Location See Site Plan ,.c,o m £> +- ex*-(Do) Q\ ojjTj QJ **v n) 0_ -315 . -310 10- -305 15- -300 20- -295 25- -290 M_ SAMP IIt^ z LES VCL to5*-S om£ D)o olcQ.at O MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over 8" base over moist, dark grayish brown, silty sand with gravel . Moist, yellowish brown, silty clay LANDFILL Moist, dark grayish brown, silty ctay with sand . Bottom of boring at 5 feet . - - - - - - • Yfne Q || 5o tio. ^l 'w (D O O REMARKS AND OTHER TESTS Figure C-51 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB39 Sheet 1 of 1 r\ntotc\U3fie\5) 2M 5/02Drilled Meffid Hollow Stem Auger Drill Rig rur 7cType CMt '& Groundwater Level Unt -__-,. -»-__,iand Date Measured Not encountered %3Sf Bentonlte chips Logged D Kirkmanby Drill Bit g» Size/Type cSlctor Tri-County Drilling Sampling Method(s) CheckedBy Total Depthof Borehole J. Werle 5.0 feet Approximate 317 0Surface Elevation Hammer 140#/30.. Location See Site Plan c" .2 Q> <P at S> MJ $ Q (D o- -315 5- -310 10- -305 15- -300 20- -295 25- -290 30- SAMPLES II 50 5.g Q.(D O MATERIAL DESCRIPTION COVER FILL 2" asphalt concrete over 2" base over moist, light yellowish brown, silty clay LANDFILL Moist, dark grayish brown, silty clay with sand . Bottom of boring at 5 feet : : _ • - - - • - . |I Q. "mc0>a £•o REMARKS AND OTHER TESTS VVMM Figure C-52 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB40 Sheet 1 of 1 Date(s) 9» e,n9Drilled aivuA Drilling Method Drill Rig Type Hollow Stem Auger CME75 Groundwater Level »i—» n.nr.A.mt«.»riand Date Measured encouniereo Borehole Backfill Bentonlte chips LoggedBy Drill Bit Size/Type DrillingContractor Sampling Method(s) Location D. Kirkman 6" Tri-County Drilling SPT Checked j Wer|e Total Depth icn*««*of Borehole 16-0 feet Approximate ,17 nSurface Elevation -*''•« Hammer 4 4(vmi<\»Data 14MH30 See Site Plan _co ra £ 0_ 315 5- -310 10- . -305 15- -300 20- -295 25- -290 M_ SAMPLES <D 8. E s 40~1 « S 4°-2 ^1 ^ £in Si 10 77 o>o_j o'£.o.<0 O MATERIAL DESCRIPTION FILL2" asphalt concrete over 2" base over moist, light yellowish brown, silty clay withsand . - Moist, dark reddish brown, silty sand with gravel (well cemented quartz and chert clasts) - SANTIAGO FORMATIONMedium dense, moist, light gray, silty fine SAND (SM) - f— Becomes very dense . Bottom of boring at 16 feet - - - . Q &" *-r »! & oSo •£ Q. ^t-°feinc Q £•Q REMARKS AND OTHER TESTS «•«*• Figure C-53 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring Sheet 1 of 1 LB41 gjffi) 2/18/02 MetUS Hollow Stem Auger ^eR|9 CME 75 SSSSSiA Not encountered Backfill6 Bentontte chips t-ogged By Drill Bit Size/Type Drilling Contractor Sampling Method(s) Location D. Kirkman 6" Tri-County Drilling SPT Checked JWer|e Total Depth 2fi 0 feetof Borehole ^^ Approximate 316 0Surface Elevation -*10-" Hammer •tAfutnn"Data w»/ou See Site Plan _ -315 5- -310 10- -305 15- -300 20- -295 25- SAMPLES <i>il ,_ 0)Q. sl 41 o o aCO O MATERIAL DESCRIPTION COVER FILL4" asphalt concrete and base over moist, yellowish brown, silty day LANDFILL_ Moist, dark grayish brown, silty clay with plastic, paper, cloth _ - - - - - SANTIAGO FORMATION Dense, moist, tight greenish gray, silty fine SAND (SM) _ Bottom of boring at 26 feet * fcS! So?0 Tia £•<nc O frO REMARKS AND OTHER TESTS WTDO Figure C-54 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB42 Sheet 1 of 1 Date(s) 7/4 0/02Drilled *"««« MeS Hollow Stem Auger »«" CME75 SSSSSlSSi Not encountered B%St* Bentontte chips Logged D Kirkmanby Drill Bit 6»Size/Type ESctor Tri-County Drilling SamplingMethod (s) Checked j Wer|e Total Depth - « ,M.of Borehole 5.0 feet Approximate ,-R „Surface Elevation •S10-u Hammer AAnunn*Data 140#/30 Locatton See Site Plan c.2 5 £> +* Q.-Wfl> <D a) 9m 3 O£ 0- -315 5- -310 10- -305 15- -300 20- -295 25- -290 30- SAMPLES QJ 11 i<fl §0co£Graphic LogMATERIAL DESCRIPTION COVER FILL„ 4" asphalt concrete over 8" base over moist, yellowish brown, silty clay with sand LANDFILL Moist, dark greenish gray, silty clay with sand and gravel . Bottom of boring at 5 feet - - - - - - £ li15 T5ex £tn Q>D £•Q REMARKS AND OTHER TESTS vvnCB R9ure c'55 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB43 Sheet 1 of 1 Dril|ee(dS) 2rt«»2 Kffi Hollow Stem Auger Drill Rig CME 7SType CMt75 Groundwater Level Nftf -nrn,,n»_,-,4and Date Measured Not encountered ^Sfiii6 BentonKe chips LoggedBy Drill BitSize/Type DrillingContractor D. Kirkman 6" Tri-County Drilling SamplingMethod(s) Location Checked j Wer|fi Total Depth s n f^ of Borehole D'u reet Approximate ,,.- QSurface Elevation •>IO<U E^mer 140#/30" See Site Plan co 1 £> *- Q.*-oj o> m 5uj£ oj 0- -315 5- -310 10- -305 15- -300 20- -295 25- -290 30- SAMPLES 0) a, fa E=^ i tea.w) S~-2Sm£ o>o o!ca. SO MATERIAL DESCRIPTION COVER FILL4" asphalt concrete and base over moist, yellowish brown, silty day LANDFILLMoist, dark areentsh arav. sittv day with sand and aravel . Bottom of boring at 5 feet - - - - - - - - ^ *i505o •5a. 2fm V>a £•O REMARKS AND OTHER TESTS WB_— , Figure C-56 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB44 Sheet 1 of 1 Date(s) ti-tmnt Logged •-. ifirirmanDrilled z/io/02 By D. Kimman Drilling H«llnwi «Wem Auner Drill Bit -„Method Hollow Stem Auger Size/Type 6 Type*9 CME 75 Contractor Trl-County Drilling Groundwater Level N t encountered Samplingand Date Measured Not «ncoiini8«a Method(s) Backfill16 Bentonite ch'Ps Location See Site Plan Checked j Wer[e Total Depth - ft <„.of Borehole 5.0 feet Approximate 11 GOSurface Elevation •* ' w Hammer -tAiamn"Data iww^u co to £ ^j"S <D"S 0- -315 5- -310 10- -305 15- -300 20- -295 25- -290 30™ SAMPLES « * fc at5*. — 8 CD Q. S O MATERIAL DESCRIPTION COVER FILL4" asphalt concrete and base over moist, yellowish brown, silty day with sand LANDFILL Moist, dark areenish arav. siltv dav with sand . Bottom of boring at 5 feet - - - - - - - YfDO - -WaterContent, %Dry Density, pcfREMARKS AND OTHER TESTS Figure C-57 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB45 Sheet 1 of 1 Date(s) 9/18/02Drilled «nwiM MeSS Hollow Stem Auger Drill Rig CME 7=Type CME 75 Groundwater Level N t enc0untBfedand Date Measured Not encountered SSSS* Bentonite chips LoggedBy Drill Bit Size/Type DrillingContractor D. Kirkman 6" Tri-County Drilling SamplingMethod(s) Location Checked j Wer|e Total Depth - 0 f tof Borehole 5'° TBCt Approximate -a* enSurface Elevation 31D'U Hammer *Arntnn»Data 14W/30 See Site Plan .o "S £ (DO) Q)<1) 0- -315 5- -310 10- -305 15- -300 20- -295 25- -290 30- SAMPLES n 0o. ^"o OTO ,O cx 5 MATERIAL DESCRIPTION COVER FILL4" asphalt concrete over 8" base over moist, yellowish brown, silty clay with sand LANDFILLMoist, dark greenish gray, silty clay with sand and gravel _ Bottom of boring at 5 feet - - - - - - - - |I Dry Density, pcfREMARKS AND OTHER TESTS Vff)^ Figure C-58 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB46 Sheet 1 of 1 Date(s) 7/1B/02Drilled *"««" MS Hollow Stem Auger liSe*9 CME75 Groundwater Level M_f _.,--,.-»_„.*and Date Measured Not encountered S3SB18 Bentonite chips Logged D Kirkman Drill Bit e-Size/Type ° cSlUr Tri-County Drilling Sampling Method(s) Checked j Wer|e Total Depth 5 0 f .of Borehole 5-° feet Approximate •*«/»Surface Elevation J10-u Hammer •« 400/30"Data iw»» Location See Site Plan .c .2<5 £ JO'S §•"<£ui J? Oi£ -315 -310 10- -305 15- -300 20^ -295 25- -290 m— SAMPLES (D -°a bj I- 2 0)O. £Ism£ O)o .0 a. SO MATERIAL DESCRIPTION COVER FILL _ 4" asphalt concrete over 8" base over moist, yellowish brown, siity day with sand LANDFILLMoist, dark greenish gray, silty clay with sand and gravel , Bottom of boring at 5 feet - - - - - - - - ^o _"*!|5 g SO *j CL„^k '<f>cQ> O £« O REMARKS AND OTHER TESTS ow WfMfff Figure C-59 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB47 Sheet 1 of 1 Date(s) Drilled Drilling Method 2/18/02 Hollow Stem Auger Typ^'9 CME 75 j r\ fcji *j Not GltCQUrrtftFCCl Borehole Backfill Bentonite chips Logged By Drill Bit Size/Type Drilling Contractor D. Kirkman 6" Tri-County Drilling Sampling Method(s) Location Checked j Wer|e Total Depth K n tMtofBorehble 5-0feet Approximate IMRKSurface Elevation olo-:> Mainmsr .• jifuiiiAnQata 14UW30 See Site Plan o 'ro £ >*- 0.--<U OJ Q> 0>m£> a£ 0- -315 5- -310 1 10- -305 15- -300 20- -295 25- -290 30- SAMPLES 0) « | ^1 oO. M oBCD£Graphic LogMATERIAL DESCRIPTION COVER FILL 1" asphalt concrete over moist, yellowish brown, silty clay with sand LANDFILL. Moist, dark greenish gray, silty clay with sand . Bottom of boring at 5 feet - _ - - - - - - -WaterContent. %t;Q. £0> <Ua fro REMARKS AND OTHER TESTS VVMM Figure C-60 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB48 Sheet 1 of 1 Drifted* 2'18/02 By"ed D" KIrkman ESS HoMow Stem Auger §£*,. r ™*V CME75 gSfctor Trl-County Drilling S?SaSJ£!l Not encountered Bgjgj SPT Backfi!?6 Bentonlt« chlDS Location See Site Plan Checked j Wer|e Total Depth * * n ,.„.of Borehole 11-0 feet Approximate TIRCSurface Bevation -310-0 Hammer 4 «<»< »»••Data 140S/30 co*3 _-5 £,S> "5J a) IP 0- -315 5- -310 10- -305 15- -300 20- -295 25- -290 30- SAMPLES 0)•° S 48"1 S 48-2 &tn 12 32 Graphic Log-"i :•' ":: •• MATERIAL DESCRIPTION FILL 1" asphalt concrete over moist, yellowish brown, silty clay with sand , Moist, medium brown, silty fine sand SANTIAGO FORMATION _ Dense, moist, light gray, sitty fine SAND (SM) _ . Bottom of boring at 1 1 feet VTDO si5 o "5o. to-rn 0>o O REMARKS AND OTHER TESTS Figure C-61 Project: Palomar Airport Center Project Location: Carlsbad, California Project Number: 58-00111062.00000 Log of Boring LB49 Sheet 1 of 1 Date(s)Drilled DrillingMethod Type 3/7/02 Hollow Stem Auger CME75 and Date Measured ^°* ^countered Backfill16 Bentonite chips Logged By Drill BitSize/Type DrillingContractor Sampling Method(s) Location D. Kirkman 6" Trf-County Drilling SPT Checked By Total Depthof Borehole ApproximateSurface Elevation J. Werle 19.0 feet 316.0 TiQrnrnGr * xivt/iri**Data KMWOU See Site Plan co "m ^ > *- Q.*-0)11} 0) <DLLJ.S Q-ffi 0- -315 - 5- -310 10- -305 15- -300 20- -295 25- -290 30- SAMPLES il 3 49-1 M S 49'2 & CO s^ 10 88 $ o D.(O O •: .•• :- •. MATERIAL DESCRIPTION COVER FILLA" asphatt concrete over 6" base over moist, yellowish brown, silty clay with sand LANDFILLMoist, dark grayish brown, sandy clay with brick fragments L. - . - - SANTIAGO FORMATION Very dense, moist, light gray with yellowish brown staining, silty SAND (SM) - _ Bottom of boring at 1 9 feet _ - - - il t5Q. c0) O Q REMARKS AND OTHER TESTS Vff>^ Figure C-62 APPENDIXA Previous Explorations URS, 2003 URS W:\27662028\04000-a-r dOCM 1 -Feb-04\SDG Project: Palo mar Airport Center-Additional Landfill Delineation Project Location: Carlsbad, CA Project Number: 27662028.TASK1 Key to Log of Boring Sheet 1 of 1 n j-. Q) OJ SAMPLES J &en Jo o>o .o Q.ro O MATERIAL DESCRIPTION REMARKS AND OTHER TESTS COLUMN DESCRIPTIONS 1 j Elevation: Elevation in feet referenced to mean sea level (MSL) or site datum. j2j Depth: Depth in feet below the ground surface. 3J Sample Type: Type of soil sample collected at depth interval sfiownTsampTer symbols are explained below. 4| Sample Number Sample identification number. Unnumbered sample indicates no sample recovery. 5| Sampling Resistance: Number of blows required to advancedriven sampler 12 inches beyond first 6-inch interval, or distance noted, using a 140-lb hammer with a 30-inch drop. 6| Graphic Log: Graphic depiction of subsurface material encountered; typical symbols are explained below. 7\ Material Description: Description of material encountered; may include relative density/consistency, moisture, color, particle size; texture, weathering, and strength of formation material. TYPICAL MATERIAL GRAPHIC SYMBOLS Silty SAND (SM) Water Content: Water content of soil sample measured in laboratory, expressed as percentage of dry weight of specimen. Dry Unit Weight: Dry density of soil sample measured in laboratory, in pounds per cubic foot. Remarks and Other Tasts:Comments and observations regarding drilling or 'sampling made by driller or field personnel. Other field and laboratory test results, using the following abbreviations: LEL Lower Explosive Limit as noted by a Combustible Gas Indicator CLAY (CL) TYPICAL SAMPLER GRAPHIC SYMBOLS 2.5-inch-OD Modified California sampler Standard Penetration sampler OTHER GRAPHIC SYMBOLS 2 First water encountered at time of drilling and sampling (ATD) — Water level measured at specified time after -*- completion of drilling and sampling f— Minor change in material properties within a stratum Inferred or gradational contact between strata GENERAL NOTES 1. Soil classifications are based on the Unified Soil Classification System. Descriptions and stratum lines are interpretive; actual lithologic changes may be gradual. Field descriptions may have been modified to reflect results of lab tests. 2. Descriptions on these logs apply only at the specific boring locations and at the time the borings were advanced. They are not warranted to be representative of subsurface conditions at other locations or times. URS Figure A-1 Project: Palomar Airport Center-Additional Landfill Delineation Project Location: Carlsbad, CA Project Number: 27662028.TASK1 Log of Boring B-1 Sheet 1 of 1 Date(s) 4/7/Q3Drilled 4"'0<5 322, Hollow Stem Auger ^ CME-75 SSSSSiSS* Not recorded Borehole Bentonite chips and topped with 6" Backfill asphalt cold-patch Logged By Drill Bit Size/Type Drilling Contractor Sampling Method(s) Location A. Marker 8" Tri-County Drilling ModCal Checked JWerte Total Depth ,. K ,^Atof Borehole 6.5 feet Approximate «1R.Surface Efevation 1>1D Hammer 14fl |bs/30» drop See Site Plan co m £> <- Q.*-o> at to 9uJ^? Otf 0- 315 2- 4- SAMPLES il l«310 6- 8- 10- -305 12- 14- ito -2 "§CQ.O 16 Graphic LogMATERIAL DESCRIPTION COVER FILL3" asphalt concrete (AC) over 4" base over moist, intermixed brown, reddishr brown, and yellowish brown, sandy lean clay i — — - - - " Bottom of boring at 6.5 feet — - - - - ^"c v£ J§§0 t>Q. 9s-t±«C<D O £•O REMARKS AND OTHER TESTS .EL is nondetectabte w_>-> Figure A-2 Project: Palomar Airport Center-Additional Landfill Delineation Project Location: Carlsbad, CA Project Number: 27662028. TASK1 Date(s) AmntDrilled *'"» Methocl Hollow Stem Auger l_/nFJ r\IQ OftflC TEType CME-75 Ground water Level utA recorded Borehole Bentontte chips and topped wHh 6" Backfill asphalt cold-patch co >*- "5.*-0) 0) a> <D LU.S? Q.S? 0- -315 2- _ 4- -310 6- 8- 10- -305 12- SAMPLES <D -° ,. I, 16 Graphic LogQ.. A. HdrKdr Drill Bit R., Size/Type ° Contractor Tri-County Drilling Sampling ««i/»-iMethod(s) *»«-» Log of Boring B-2 Sheet 1 of 1 Checked j Wer|e Total Depth R e fft_.of Borehole Approximate 31B>Surface Elevation <>l0 Data ^^ lbs/30" drop Location See Site Plan MATERIAL DESCRIPTION COVER FILL. 3" asphalt concrete (AC) over 4" base over moist, dark brown, sandy lean clay with . fine gravel ~f — Becomes light brown — -- • f — Becomes wet. dark brown - - - - Bottom of bonng at 6.5 feet - - - T1DC S o5o Q. '5>c: O Q REMARKS AND OTHER TESTS LEL is nondetectable Figure A-3 Project: Palomar Airport Center-Additional Landfill Delineation Project Location: Carlsbad, CA Project Number: 27662028.TASK1 Log of Boring B-3 Sheet 1 of 1 BSSS* 4/7/03 B^ A. Marker MeB Hollow Stem A"9er SizeHVpe 8" Type*'9 CME'75 confractor Tri-County Drilling Groundwater Level Nnf ^carrf-H Sampling umiteiand Date Measured Not recorded Method(s) M«*«' Borehole Bentonlte chips and topped with 6" , ,- s ... p|Backfill asphalt cold-patch Location see site i*ian Checked j Wer|e of°Boreho£ 10-8feet Approximate ,1K.Surface Elevation -110 olte™' 14° lbs/3°" dr°D c"o 'ro £ _<D 0) <u oS -315 2- 4- -310 6- 8- 10- -305 12- 14- SAMPLES lypeNumber3-1 3-2 o>a. 13 50/4.5" o>o _o O MATERIAL DESCRIPTION FILL . 3" asphalt concrete (AC) over 4" base over moist, intermixed yellowish brown,brown, and reddish brown, sandy lean day with fine to coarse gravel . SANTIAGO FORMATIONVery dense, moist, pale gray, silty fine SANDSTONE (SM) Bottom of boring at 10.8 feet TfDVUK0 __"£ II Dry Density, pcfREMARKS AND OTHER TESTS LEL is nondetectaWe Figure A-4 Project: Palomar Airport Center-Additional Landfill Delineation Project Location: Carlsbad, CA Project Number: 27662028.TASK1 Log of Boring B-4 Sheet 1 of 1 Date(s) A/7/03Drilled 4"'0<* BSH, Hoitow Stem Auger Drill Rig r*uc TKType CME-75 Groundwater Level Mrtt rnpnni»tiand Date Measured Not recorded Borehole Bentonite chips and topped with 6" Backfill asphalt cold-patch c".0 w £> t-, CL*--<D 0) Q) 0) UJ.S? Q.ffi -315 2- 4- -310 " 8- 10- 305 12- 14- SAMPLES V * f £l j,, Q)O. 8-SO CD -2 24 8* _o CLeo ^ ^9ed A. Marker Drill Bit R..Size/Type ° cXlctor Tri-County Drilling "<*<*• Location See Site Plan Checked j Wer,e Total Depth - - ,„„*ofBorehble 6.5 feet Approximate ,-c 7c-Surface Elevation -513-'3 Date"18' 140 Ibs^O" drop MATERIAL DESCRIPTION COVER FILL 3" asphalt concrete (AC) over 4" base over moist, light brown, lean clay with finegravel — f — Becomes dark brown, silty to clayey fine sand - LANDFILL DEBRISMoist, dark brown, lean clav with black staining with hydrocarbon odor SANTIAGO FORMATIONVerv stiff, most, lean CLAY (CL) with iron oxide stamina Bottom of boring at 6.5 feet Tme ^*iSo5o Dry Density, pcfREMARKS AND OTHER TESTS LEL is nondetectable Figure A-5 Project: Palomar Airport Center-Additional Landfill Delineation Project Location: Carlsbad, CA Project Number: 27662028.TASK1 Log of Boring B-5 Sheet 1 of 1 Date(s) Afrin'tDrilled •*"'"•> MethSf Hollow Stem Auger %$** CME-75 Groundwaler Level N , recordedand Date Measured Not recoroea Borehole Bentonlte chips and topped with 6" Backfill asphalt cold-patch c .2 Q) fn fj\ fl) jTJ n) f-\ flj -315 2~ 4- -310 " 8- 10- -305 14- SAMPLES «D * I" 0)CL in .90 25 Graphic Log$»* A.Harker Drill Bit .„ Size/Type Contractor Tri-County Drilling Sampling unri^aiMethod(s) "o^1^1 Checked j Wer)e Total Depth - , ....of Borehole 6.5 feet Approximate 11K TE*Surface Elevation •»ia-'» Hammer 140 |bs/3o" drop Location See Site Plan MATERIAL DESCRIPTION COVER FILL3" asphalt concrete (AC) over 4" base over moist, brown, sandy lean clay with fine gravel . LANDFILL DEBRIS Moist, dark brown, sandy lean clay, intermixed w'rth green, silty fine sand and with _ hydrocarbon odor Bottom of boring at 6.5 feet __ c If5o tiQ. "«C0)Q £•D REMARKS AND OTHER TESTS LEL is nondetectable v M^tfV Figure A-6• ••.•^^ Project: Palomar Airport Center-Additional Landfill Delineation Project Location: Carlsbad, CA Project Number: 27662028.TASK1 Log of Boring B-6 Sheet 1 of 1 Date(s) 417/03Drilled 4"'UJ 3353, Hollow Stem Auger ?$eRi9 CME'75 Groundwater Level N . -,-o-taJand Date Measured Not *«orclea Borehole Bentonite chips and topped with 6" Backfill asphalt cold-patch Logged By Drill BitSize/Type DrillingContractor SamplingMethod(s) Location A. Marker 4** Tri-County Drilling ModCal Checked j Wefte Total Depth - - «_.tof Borehole 6.5 feet Approximate -1 - «•Surface Elevation •»ID-'» Hammer 140lbBrao-drop See Site Plan co ra £ 0> 0> §" 0>ill 45 Q45 0_ 315 2- 4- 310 - 8- 10- -305 12- 14- SAMPLES jp E z 6-1 w- Q. cn o-Smj 15 oi o!c Q.CO O V///Y//S MATERIAL DESCRIPTION FILL3" asphalt concrete (AC) over 4" base over moist, intermixed light brown and dark brown, sandy iean day with some fine to coarse gravel - -i f — Becomes yellowish brown, silty fine sand followed by sandy lean clay with fine to coarse gravel SANTIAGO FORMATIONStiff to verv stiff, moist. Dale brown, lean CLAY (CD Bottom of boring at 6.5 feet - _ _ - - - e^ — - -SJf 5o t3Q. ^£j<O Q)O £• O REMARKS AND OTHER TESTS LEL is nondetectabte TfnC" Figure A-7 Project: Palomar Airport Center-Additional Landfill Delineation Project Location: Carlsbad, CA Project Number: 27662028. T AS K1 Log of Boring B-7 Sheet 1 of 1 gSfi> 4/7/03 Sg"ed A. Marker SSSl HoMow Stem Auger gj^ 4" Type**9 CME'75 Contractor Tri-County Drilling Groundwater Level Uftt —.«»i«i Sampling u«jr»«iand Date Measured Not recorded Method® M**1081 Checked j Wer|e Total Depth e - f _,..of Borehole 6.5 feet Approximate ^1 c re-Surface Elevation •» ' 3- ' => BS"1" 1«0 .bs/30- drop Borehole Bentonite chips and topped with 6" . ™linn <•„ <»to pi--Backfill asphalt cold-patch Location s>ee site nan c.0 ,w~a> ® "HJ 0- -315 2- 4- -310 6: Q 10- -305 12- 14- SAMPLES «•Q I" ID 36 .t> CLto O %, MATERIAL DESCRIPTION FILL3" asphalt concrete (AC) over 4" base over moist, intermixed brown and lightbrown sandy lean day - _ - - . SANTIAGO FORMATION Hard, moist, pale brown, lean CLAY (CL)with iron oxide staining Bottom of boring at 6.5 feet siSoSo "oQ. "5 O Q REMARKS AND OTHER TESTS LEL is nondetectable WJ«M F'9ure A-8 Project: Palomar Airport Center-Additional Landfill Delineation Project Location: Carlsbad, CA Project Number: 27662028.TASK1 Log of Boring B-8 Sheet 1 of 1 Date(s) Amnt Logged . uarirnrrtf-ill£u-l *fffiVw Qi» P^. riainCI MeS Hollow Stem Auger SizeHYpe 4" ™l e R'9 CME-75 cffictor Tri-County Drilling Groundwater Level Wftt „---*„* Sampling Mndc-iand Date Measured Not recorded Method(s) ModCal Checked j Wer|e Total Depth - 5 f^ of Borehole 6'5 feet sKot'Etevation 316'25' Hammer 4 An iK«/in" ^r«nData 140IDS/30 drop Borehole Bentontte chips and topped with 6" , -„«..- See SIte p.anBackfill asphalt cold-patch Location see site Plan co*J f?ro ±, ^ OJ 0)0) 0- -315 2 4- :310 8- 10- -305 12- 14- SAMPLES isu » (O O OcQi2 17 Graphic LogMATERIAL DESCRIPTION FILL 1.5" asphalt concrete (AC) over motst intermixed brown, reddish brown brown, lean clay with wood chips — _ - and light — - Bottom of boring at 6.5 feet TTDO - - w c if5o t5Q. 'v> «>O O REMARKS AND OTHER TESTS LEL is nondetectable Figure A-9 Project: Palomar Airport Center-Additional Landfill Delineation • of Borina B-10 Project Location: Carlsbad, CA Project Number: 27662028.TASK1 Sheet 1 of 1 Date(s) 4/7103Drilled 4/"°'* MethS) Hollow Stem Auger ^B CME-75 Groundwater Level u_. _*---j-.|and Date Measured Not recorded Borehole Bentontte chips and topped with 6" Backfill asphalt cold-patch Logged By Dnll Bit Size/Type Drilling Contractor Sampling Method(s) Location A. Marker 4" Tri-County Drilling ModCal Checked j Wer|e Total Depth c c f__. of Borehole 65feet Approximate ?IC->K-Surface Elevation •»1'»-» Hammer 14Q |bs/30« drop See Site Plan 1 SAMPLES cg ro £>*- K+-0> 0) 4) Q) UJ^ffi Q.2 - -315 2- 4- i_(U Q- § I- Z 1.6Hi-310 |{ • 8- 10- -305 12- 14- O. o f^p.p 23 8*_i.0 Q. 2O MATERIAL DESCRIPTION FILL 1 .5" asphalt over moist, intermixed brown and yellowish brown, silty to clayey sand to sandy clay - - - Bottom of boring at 6.5 feet *j teH *n> o &O t5Q- tnc.0)Q £. O REMARKS AND OTHER TESTS LEL is nondetectable VVW^aTP Figure A-11 UHA Project: Palomar Airport Center-Additional Landfill Delineation Project Location: Carlsbad, CA Project Number: 27662028.TASK1 Date(s) 4/7/03Drilled MeS Hollow Stem Auger ?y^eRi9 CME-75 Groundwater Level Unt recorded Borehole Bentonlte chips and topped with 6" Backfill asphalt cold-patch co TO £> +*. Q.—<D 0) o> 9 LU.S? Q.2 -315 2- 4- - 6- 310 8— 10- 12- 14- SAMPLES tl 11-1 11-2 Q. (ft5_— 8 7 24 Graphic Logi? Log of Boring B-11 Sheet 1 of 1 L°99ed A. Marker Drill Bit d.Size/Type ESctor Tri-County Drilling Sampling CDTMethod(s) &KI Location See Site Plan Checked j Wer|e Total Depth ., - K ,„.of Borehole 11-5 feet Approximate ticc*Surface Elevation -510-3 Datamer 14° lbs/3°" d|roP MATERIAL DESCRIPTION FILL1 .5" asphalt over moist, intermixed brown and yellowish brown, silty to clayey sand . - - - - - - - -f — Becomes sandy clay -1 _ - - SANTIAGO FORMATIONVery stiff,, moistjjght brown, sandyjean CLAY {CL) Medium dense,moist, light yellowish brown, silty fine to coarse SANDSTONE (SM) Bottom of boring at 1 1 .5 feet _ P13 Q. 'wc0)O Q REMARKS AND OTHER TESTS LEL is nondetectable Vfn>9 Figure A-12 APPENDIX6 Previous Geophysical Survey URS W:\27662028\04000-a-r.doc\11-Feb-04\SDG APPENDIKB Previous Geophysical Survey As part of the 2002 URS investigation, GeoVision performed 12 geophysical traverses using ground- penetrating radar and metal detection equipment under the direction of an engineer from our firm. The geophysical survey was performed to evaluate the northern limits of the Landfill Unit No. 1A. A copy of the report prepared by GeoVisions, presenting its findings and conclusions, is presented in this appendix. The result of its investigation were used, along with previous and current subsurface explorations, to provide the landfill limits shown on Figure 2. W\27662028\04000-a-r.doc\11-Feb-Q4\SDG B- 1 geophysical aero division ofBlackhawk GeoSeruices October 18, 2001 Project Number: 1447 Mr. Steve Fitzwilliam URS Corporation 1615 Murray Canyon Road, Ste. 1000 San Diego, CA 92108 Subject: Geophysical Investigation of Former Landfill Palomar Airport Center in Carlsbad, California Dear Mr. Fitzwilliam A geophysical investigation was conducted on the 26th of September 2001 on portions of a former landfill at Palomar Airport Center in Carlsbad, California. The purpose of the investigation was to identify the former landfill boundary along twelve profiles. Geophysical methods applied to this investigation included the ground penetrating radar (GPR) and electromagnetic (EM) techniques. METHODOLOGY EM equipment included a Geonics EM-31 digital terrain conductivity meter (EM-31), a Geonics EM-61 high-resolution metal detector (EM-61), and a Fisher TW-6 EM metal detector. GPR equipment used during this investigation consisted of a Geophysical Survey Systems Inc. (GSSI) SIR-1 OB GPR system with 200 and 400-MHz antenna (SIR10B). Details on these geophysical methods can be found in the attached technical note titled "Geophysical Techniques for Shallow Environmental Investigations." 1151 Pomona Road, Unit P • Corona, California 92882 • Tel: (909) 549-1234 • Fax: (909) 549-1236 www.geovision.com Mr. Fitzwilliam Page 2 October 17,2001 FIELD PROCEDURES Before conducting the geophysical survey twelve profiles were marked on the ground within the survey area using surveyor paint, herein referred to as P-l through P-12. Obvious surface cultural features that could potentially affect the geophysical data (i.e. surface metallic objects, planes, plane tie downs and buildings) were identified in the field and noted on the geophysical data acquisition forms. A site map indicating the location of the geophysical profiles was provided by URS Corporation and a copy is attached as Figure 1. EM-31 measurements were made at 5-foot intervals and EM-61 measurements at 2.5-foot intervals along the profile lines. Data collection started inside the suspected landfill and headed outside the suspected landfill using the 5-foot grid points for spatial control. Both the EM-31 and EM-61 data were stored in digital data loggers along with line and station number. EM-31 and EM-61 data were downloaded to a laptop computer upon completion of the survey. GPR data were acquired semi-continuously (32 scans per second) as a 400-MHz and 200MHz antenna was hand-towed along the profiles. Control points were placed on the GPR records at 10-foot intervals using a marker switch on the antenna. GPR data were viewed in real time on the SIR-lOB's color monitor and saved to the SIR- lOB's hard disk for later processing and printing. GPR file names along with line number; station range and acquisition parameters were recorded in field notes. All field copies of GPR data are retained in the project files. DATA PROCESSING Profiles of EM-31 and EM-61 data were generated using the Grapher® graphing system. Prior to profile generation, a number of preprocessing steps were completed and included: • Backup of all original field data files to floppy disk. • Correcting all data acquisition errors (typically only deleting the first portion of a reacquired line, renaming lines incorrectly labeled, deleting additional readings outside the grid, etc.) • Reformatting field data files to free format XYZ files containing line number, station, time (if applicable), and field measurements. • Merging of multiple data files into a single file and sorting, if necessary. • The output of the data preprocessing was a data file containing line and station number and instrument readings. These data files were imported into the Grapher® graphing system for plotting Mr. Fitzwilliam Page 3 October 17,2001 GPR data were downloaded from the SIR-10B hard disk to a computer after completion of the field investigation. Data processing steps applied to the GPR data included gain adjustment, vertical high and low-pass filtering, horizontal high- and low-pass filtering, and horizontal distance normalization. All GPR data files were printed and archived on CD-ROM. RESULTS The EM-61 bottom coil profiles are presented as Figures 2 and 3 and EM-31 in-phase response profiles as Figures 4 and 5. The coordinates shown in these figures reference the relative geophysical coordinate system shown in Figure 1. EM-61 top coil, differential, and EM-31 quadrature response data were also acquired. These data are not presented as they did not provide additional information and were, therefore, considered redundant. These data are, however, retained in project files. Buried metallic debris was identified in the EM61 data on Profiles P-2, P-3, P-4, P-5, P-6, P-7, P-8 and P-9 as shown on Figures 2 and 3. The EM-31 identified buried metallic debris on Profiles P-2, P-6, P-7, P-8 and P-9, as shown on Figures 4 and 5, at locations consistent with the EM-61 data. From the EM-61 and EM-31 data the northern limit of buried metallic debris was interpolated this boundary is probably coincident with the northern limit of buried landfill materials. High readings indicative of buried metallic debris were noted in the EM-31 data on Profiles P-3, P-4 and P-5 at locations outside of the suspected landfill boundary as shown on Figure 1. This is not consistent with the EM-61 data or the suspected landfill boundary interpreted from aerial photography. It is possible that the high in-phase response readings identified on Profiles P-3, P-4 and P-5 are the result of unknown interference. However, it cannot be ruled out that the high readings are due to buried metallic debris at depths of greater than 5 feet which the maximum depth of exploration of the EM-61. No buried metallic debris was detected in either the EM-61 or EM-31 data on Profiles P- 10,P-1,P-11 andP-12. GPR data identified a vertical interface on Profiles P-2, P-3, P-4, P-5, P-6, P-7, P-8, P-9 and P-12 that is consistent with the edge of former excavation, as shown of Figure 6. From the GPR data the northern limit of former excavation was interpolated this boundary is approximately parallel to the interpolated limit of buried metallic debris but approximately 20-feet to the north of it. Mr. Fitzwilliam Page 4 October 17,2001 If you have any questions concerning this investigation, please call Mr. Riches at 909- 549-1234. Sincerely, Mark Riches, R.GP. Senior Geophysicist GKOVision Geophysical Services Attachments: Technical Note - Geophysical Techniques for Shallow Environmental Investigations Figure 1: Site Map with Geophysical Interpretation Figure 2: Geonics EM-61 Bottom Coil Response P-l, P-2, P-3, P-4, P-5, and P-6 Figure 3: Geonics EM-61 Bottom Coil Response P-7, P-8, P-9, P-10, P-l 1, and P-12 Figure 4: Geonics EM-31 In-phase Response P-l, P-2, P-3, P-4, P-5, and P-6 Figure 5: Geonics EM-31 In-phase Response P-7, P-8, P-9, P-10, P-l 1, and P-12 Figure 6: Ground Penetrating Radar Profiles P-3 and P-4 GEOPHYSICAL TECHNIQUES FOR SHALLOW ENVIRONMENTAL INVESTIGATIONS geophysical services a division ofBlackhavok Geometries MAGNETIC METHOD The magnetic method generally involves the measurement of the earth's magnetic field intensity or vertical gradient of the earth's magnetic field. Anomalies in the earth's magnetic field are caused by induced or remanent magnetism. Induced magnetic anomalies are the result of secondary magnetization induced in a ferrous body by the earth's magnetic field. The shape and amplitude of an induced magnetic anomaly is a function of the orientation, geometry, size, depth, and magnetic susceptibility of the body as well as the intensity and inclination of the earth's magnetic field in the survey area. The magnetic method is an effective way to search for small metallic objects, such as buried ordnance and drums, because magnetic anomalies have spatial dimensions much larger than those of the objects themselves. Typically, a single buried drum can be detected to 3 depth of about 10 feet. Larger metallic objects can often be located to greater depths. Induced magnetic anomalies over buried objects such as drums, pipes, tanks, Geometries G858 Cesium Magnetic Gradiometer and buried metallic debris generally exhibit an asymmetrical, south up/north down signature {positive response south of the object and negative response to the north). Magnetic data is typically acquired along a grid with results being presented as color-enhanced contour maps generated by the Geosoft™ Mapping System or OASIS montaj. The approximate location and depth of magnetic objects can be calculated using the.TMGeosoft'MUXO System. TOTAL MAGNETIC FIELD CONTOUR MAP OF VERTICAL MAGNETIC GRADIENT Magnetic Survey to Locate Abandoned Oil Wells Magnetic Survey to Locate Pits Containing Buried Metallic Containers Magnetic surveys are typically conducted to: Locate abandoned steel well casings Locate buried tanks and pipes Locate pits and trenches containing buried metallic debris Detect buried unexploded ordnance (UXO) Map old waste sites and landfill boundaries Clear drilling locations Map basement faults and geology Investigate archaeological sites Geonics EM-31 Terrain Conductivity Meter ELECTROMAGNETIC METHODS Electromagnetic (EM) methods typically applied to shallow environmental investigations include frequency domain EM methods, such as EM induction and EM utility location methods, time domain electromagnetic (IDEM) metal detection methods, and ground penetrating radar (GPR) methods. EM Induction Method EM induction surveys are often conducted using the Geonics EM-31 terrain conductivity meter {EM-31). The EM-31 consists of a transmitter coil mounted at one end and a receiver coil mounted at the other end of a 3.7-meter long plastic boom. Electrical conductivity and in-phase component field strength are measured and stored along with line and station numbers in a digital data logger. In-phase component measurements generally only respond to buried metallic objects; whereas conductivity measurements also respond to conductivity variations caused by changes in soil type, moisture or salinity and the presence of nonmetallic bulk wastes. The EM-31 must pass; over or immediately adjacent to a buried metallic object to detect it- Typical EM-31 anomalies over small, buried metallic objects consist of a negative response centered over the object and a lower amplitude positive response to the sides of the object When the instrument boom is oriented parallel to long, linear conductors such as pipelines a strong positive response is observed The EM-31 can explore to depths of about 6 meters, but is most sensitive to materials about 1 meter below ground surface. Single buried drums can typically be detected to depths of about 5 feet. EM-31 surveys are typically conducted to • Locate buried tanks and pipes • Locate pits and trenches containing metallic and/or nonmetallic debris • Delineate landfill boundaries • Delineate oil production sumps and mud pits • Map conductive soil and groundwater contamination • Map soil salinity in agricultural areas • Characterize shallow subsurface hydrogeology > Map buried channel deposits > Locate sand and gravel deposits > Locate conductive fault and fracture zones Geonics EM-31 Survey to Locate Underground Storage Tanks EM Utility Location Methods EM utility locators; such as the Metrotech 810, Metrotech 9890 and Radiodetection RD400, are designed to accurately trace metallic pipes and utility cables and clear drilling/excavation locations. These utility locators consist of a separate transmitter and a receiver. The transmitter emits a radio frequency EM field that induces secondary fields in nearby metallic pipes and cables. The receiver detects these fields and is used to accurately locate and trace the pipes, often to distances over 200 feet from the transmitter. Many of the utility locators have a passive 60Hz mode to locate live electrical tines. Modern utility locators are also capable of providing rough depth estimates of the pipes A Metrotech EM Utility Locator TDEM Metal Detection Methods A Geonics EM-61 (EM-61) is a high sensitivity, time-domain, digital metal detector which is often used to detect both ferrous and non-ferrous metallic objects. It is designed specifically to locate buried metallic objects such as drums, tanks, pipes. UXO, and metallic debris and to be relatively insensitive to above ground structures such as fences, buildings, and vehicles. The EM-61 consists of two square, 1-meter coils, one mounted over the other and arranged on a hand-towed cart. The bottom coil acts as both a transmitter and receiver while the top coil is a receiver only. While transmitting the bottom coil generates a pulsed primary magnetic field, which induces eddy currents into nearby metallic objects. When the transmitter is in its off cycle both coils measure the decay of these eddy currents in millivolts (mV) with the results being stored in a digital data logger along with position information. The decay of the eddy currents is proportional to the size and depth of the metallic target. A symmetrical positive anomaly is recorded over metallic objects with the peak centered over the object. The signal from the top coil is amplified in such a way that both coils record effectively the same response for a metallic object on the surface and the top coil records a larger response for buried metallic objects. The response of near surface objects can, therefore, be suppressed by subtracting the lower coil response from the upper coil response (differential response). In practice, the usable depth of investigation of the EM-61 depends on the size and shape of the object and the amount of above ground interference encountered at the site. A single buried drum can often be detected at a depth of about 10 feet. Geomcs EM-61 Survey to Map Subsurface Infrastructure and Potential UXO Geonics EM-61 Digital Metal Detector GPR Methods GSSf S/R-tOA GPR Unit Ground-penetrating radar (GPR) is a high-frequency electro- magnetic method commonly applied to a number of engineering and environmental problems. A GPR system radiates short pulses of high-frequency EM energy into the ground from a transmitting antenna. This EM wave propagates into the ground at a velocity that is primarily a function of the relative dielectric permittivity of subsurface materials. When this wave encounters the interface of two materials having different dielectric properties, a portion of the energy is reflected back to the surface, where it is detected by a receiver antenna and transmitted to a control unit for processing and display. Depth penetration is a function of antenna frequency and the electrical conductivity of the soils in the survey area. Lower frequency antennas achieve greater depth penetration than higher frequency antennas, but have poorer spatial resolution. Conductive soils, such as clays, attenuate the radar waves much more rapidly than resistive dry sand and rock. In many environments in California, depth penetration of 500 and 300 MHz antennas is limited to 3 to 5 feet. Depth penetration may be greater tf shallow soils consist of clean sands and less if shallow soils consist of clay. GPR surveys are typically conducted to; • Locate and delineate underground storage tanks (metallic and non-metallic) • Locate metallic and nonmetallic pipes and utility cables • Map rebar in concrete structures • Map landfill boundaries • Delineate pits and trenches containing metallic and nonmetallic debris • Delineate leach fields and industrial cribs • Delineate previously excavated and backfilled areas • Map shallow ground water tables • Map shallow soil stratigraphy • Map shallow bedrock topography « Map shallow subsurface voids and cavities • Characterize archaeological sites Geophysical Survey Systems Inc. (GSSI) SIR-2 or SIR-10 GPR systems with antennas in the frequency range of 50 to 1,000 MM;: are often used during GPR investigations. Mala Geoscience and Sensors and Software, Ltd also manufacture GPR systems. GPR data is processed using a variety of software including the RADAN™ or GRADIX software packages by GSSI and Interpex Ltd., respectively. DISTANCE (feet) 125 135 10- GPR Survey to Locate Underground Storage Tanks LU a: £.-'-—: < O < L_L_ g,i1 b-31 -S ?e)HN — ' ciE a Cl> ^ O 1 Q (I99d) PROFILE P-2 Buried Metallic Debris DISTANCE (Feet) 40 30 - 20 - 10 - 0 0 Buried Metallic Debris PROFILE P-3 10 20 30 DISTANCE (Feet) 40 160 43 | 120 I 80 f 40 Buried Metallic Debris 10 PROFILE P-4 i 20 30 DISTANCE (Feet) 40 120a 1 80 Ep¥ 40 PROFILE P-5 Buried Metallic Debris 10 20 30 40 DISTANCE (Feet) 50 600 PROFILE P-6 •& 1 400 - E P•o 200 H Buried Metallic Debris 10 20 30 DISTANCE (Feet) 40 'ISlO/l o <fto**m of filodkAow* CbaStervfam Project No. 1447 Date 10-01-01 Developed by: Mark Riches FIGURE 2 - GEONICS EM6 P-1.P-2, P-3.P-4 FORMER L PALAOMAR All CARLSBAD, PREPARED FOR L PROFILE P-8 Buried Metallic Debris 10 20 30 40 DISTANCE (Feet) 50 80 £ | 60 I 40 H 1 20 H o: 0 Buried Metallic Debris PROFILE P-9 10 20 DISTANCE (Feet) 30 40 160 I 120 I 80 | 40 IT PROFILE P-10 10 20 30 DISTANCE (Feet) 40 25 I 20 1 15 - Sf 10 - "S c "1 5 - 0 PROFILE P-11 No Data Due To Planes 10 DISTANCE (Feet) 20 240 - | 200 H I 160 - | 120 - f 80 -\o I 40 0 Planes PROFILE P-12 Surf; o 10 20 DISTANCE (Feet) 30 40 MpJfcpfaalMnrfetto dtvitto* of BfacMuuvh GcoServton Project No. 1447 Date 10-01-01 Developed by: Mark Riches FIGURE 3- GEONICSEM6' P-7, P-8, P-9, P- FORMER PALAOMAR AIF CARLSBAD, PREPARED FOR U 4 2 H 10 PROFILE P-2 20 30 DISTANCE (Feet) Building & Ove 40 12 1 8 10 PROFILE P-3 20 30 DISTANCE (Feet) Buried Metallic C 40 10 A D> 6 3 4 £ 2 H 0 0 10 PROFILE P-4 20 30 DISTANCE (Feet) Buried Metallic Dt 40 2 H 0 10 20 PROFILE P-5 30 40 DISTANCE (Feet) Buried Metallic I 50 40 130 I 20 H eg 5 10 H Buried Metallic Debris 10 PROFILE P-6 20 30 DISTANCE (Feet) 40 gtophyitcala caoislow «fBlackhawk Project No. 1447 Date 10-01-01 Developed by: Mark Riches FIGURE 4 -GEONICSB P-1.P-2.P-3, FORMER PALAOMAR AI CARLSBAD PREPARED FOR I 10 20 PROFILE P-8 30 40 DISTANCE (Feel) 50 PROFILE P-9o I6 - f4-ia 2 - n Buried Metallic Debris ^^*^~~~~~~~~^ 10 20 30 40 DISTANCE (Feet) 50 PROFILE P-10 *HJ 30 - 20 - 10 - — C i | , | , | ) 10 20 30 40 DISTANCE (Feet) ? A - 10 PROFILE P-11 20 30 40 DISTANCE (Feet) 50 60 20 H 10 0 10 PROFILE P-12 20 DISTANCE (Feet) 30 40 of BlacMwtvk GeoSkrvien Project No. 1447 Date 10-01-01 Developed by: Mark Riches FIGURE 5 -GEONICSE* P-7, P-8, P-9, F FORMEI PALAOMAR A CARLSBAC PREPARED FOR I APPENDIXC Current Investigation URS W:\27662028\04000-a-r.doc\11-FeD-04\SDG APPENDIXC Current Investigation Seventeen exploratory borings (LB-50 through LB-63, and LB-70 through LB-72) were advanced on January 29 and February 2, 2004. The approximate locations of these borings are shown on the Site Plan (Figure 2). The borings were advanced to depths between 2 and 14 feet with a CME-75, truck-mounted drill rig equipped with 8-inch, hollow-stem augers or a direct push geoprobe rig. The push rig was used for locations within structures or where overhead utility lines prevented the use of the larger hollow-stem auger rig. The explorations were performed under the direction of an engineer from URS. Samples of the subsurface materials were obtained from the hollow-stem auger borings using a Modified California (ModCal) sampler (2.458-inch inside diameter, 2.5-inch outside diameter). The ModCal samplers were generally driven 18 inches in the material at the bottom of the boring using a 140-pound drop hammer falling 30 inches. The soil was removed from the sampler, sealed to preserve the natural moisture content of the sample, and returned to our laboratory for further examination and testing. Samples of the subsurface materials were obtained from the direct push borings by pushing a small- diameter hollow steel rod into the ground to a selected depth and extracting a small soil/water sample. Direct push method uses percussion hammers and static vehicle weight combined with hydraulic cylinders to advance sampling tools to depth. The direct push method does not generate a large volume of potentially contaminated drill cuttings as conventional drilling methods do. This method is typically used in areas of unconsolidated materials such as clay, silt, sand, and gravel. The sampler used during drilling consisted of a split barrel sampler where sampling rings (lin. x2.5 in.) were housed (see below). OUTER CAftMO OfUWSHQf OHVEBDOT EMM-CASED SOL SAHPVHQ CTSIEK Soil borings were monitored for methane and oxygen gases. A Landtech GA90 infrared gas analyzer was used to measure methane and oxygen concentrations. Prior to sampling, boring locations were purged with at least three well volumes of clean air. Then readings were recorded after three volumes of internal volume (dead volume) air was purged and concentrations of methane and oxygen had stabilized. Monitoring depths were determined by maximizing chances of detecting contamination (minimizing effects due to vapor movement) at depths where fill material was present and at deepest boring depths. Monitoring with this technique adhered to the most current San Diego Site Assessment and Mitigation Manual, 2003. UK0 W:\27662028\04000-a-r.doc\11-Feb-04\SDG C-l APPENDIXC Current Investigation Soils were characterized continuously during all drilling events. Samples were collected for PID and CGI readings every five feet or in areas of change in soil type. Six samples were collected from locations LB- 70, LB-71 and LB-72, and submitted to a laboratory for geotechnical laboratory testing. Five 55-gallon drums were used to collect the drilled cuttings. Two composite soil samples were created by blending samples taken from each of the 5 drums. The samples were stored in glass jars and transported on ice in a cooler to an analytical laboratory. The soil samples were determined to be non- hazardous, and will be removed from the site for proper disposal at an active landfill in the near future. The borings were backfilled with activated granular bentonite or bentonite grout. The locations of the borings are approximate and were estimated by our personnel using the site map provided to us. A Global Positioning System (GPS) unit was used to determine the locations of the current exploration locations with respect to fixed landmarks. A Key to Boring Logs is presented as Figure C-l. Final logs of the borings are presented on Figures C-2 through C-l 8. The descriptions are based on field observations, sample inspection, and laboratory testing. W\27662028\04000-a-rdoc\11-Feb-04\SDG C-2 Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA Key to Log of Boring Sheet 1 of 1 (D>*-<D 0)Q.*-m <D SAMPLES (DQ. ia Q. (D o MATERIAL DESCRIPTION Q>Q O REMARKS AND OTHER TESTS COLUMN DESCRIPTIONS _jj Elevation: Elevation in feet referenced to mean sea level (MSL) or site datum. _2j Depth: Depth in feet below the ground surface. 3] Sample Type: Type of soil sample collected at depth intervalshown; sampler symbols are explained below. 4] Sample Number: Sample identification number. Unnumbered sample indicates no sample recovery. 5| Sampling Resistance: Number of blows required to advance driven sampler 12 inches beyond first 6-inch interval, or distance noted, using a 140-lb hammer with a 30-inch drop. 6j Graphic Log: Graphic depiction of subsurface material encountered; typical symbols are explained below. 7\ Material Description: Description of material encountered; may include relative density/consistency, moisture, color, particle size; texture, weathering, and strength of formation material. TYPICAL MATERIAL GRAPHIC SYMBOLS Clayey SAND (SC) Water Content: Water content of soil sample measured jn laboratory, expressed as percentage of dry weight of specimen. pry Unit Weight: Dry density of soil sample measured inlaboratory, in pounds per cubic foot. Remarks andl_OtherTests:Comments and observationsregarding drilling or sampling made by driller or field personnel. Other field and laboratory test results, using the following abbreviations: PIP Photo-ionization device field sample headspace in parts per million (ppm) CH, Methane as measured by Combustible Gas Indicator (CGt) in percent Oj Oxygen as measured by Combustible Gas Indicator (CGI) in percent Silty SAND (SM)SILT (ML)CLAY (CL) TYPICAL SAMPLER GRAPHIC SYMBOLS I 2.5-inch-OD Modified California sampler Direct push sampler OTHER GRAPHIC SYMBOLS y First water encountered at time of drilling and- sampling (ATD) w Water level measured at specified time after - completion of drilling and sampling I — Minor change in material properties within a stratum -- Inferred or gradationaf contact between strata GENERAL NOTES 1 . Soil classifications are based on the Unified Soil Classification System. Descriptions and stratum lines areinterpretive; actual lithologic changes may be gradual. Field descriptions may have been modified to reflect results oflab tests. 2. Descriptions on these logs apply only at the specific boring locations and at the time the borings were advanced. They are not warranted to be representative of subsurface conditions at other locations or times. URS Figure C-1 Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA Log of Boring LB-50 Sheet 1 of 1 Date(s) 1/29/04 SeS Hollow Stem Auger Dri^Rig CME75 Groundwater Level N t ftnc0untBredand Date Measured Not «neoumereu ESS?.?6 Granular bentonite LoggedBy Drill Bit Size/Type Drilling Contractor SamplingMethod(s) Location P. Tan 6" West Hazmat Drilling ModCal CheckedBy J. Werle y&SSSl 6'5feet ^rSSmHeeVation 314.5 feet HammerData See Site Plan 140 lbs/30" drop co TO £ 0) 15 fl) fl> o- 2— 4- 310 -- 8- -305 10- 12- 14- -300 SAMPLES iJ LB-50-1 .,„ »Q. 5-5 o 50/4" _o Q.2O MATERIAL DESCRIPTION SANTIAGO FORMATION, Dense, moist, light grayish white, SILT (ML) with iron staining - - - - Bottom of boring at 6.5 feet - — — , r - as si5 o Dry Density, pcfREMARKS AND OTHER TESTS PID=0, CH.=0,O2=21.3 PID=0, CH4=0,O2=21.1 WR>0 F'9ure C'2 Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA Log of Boring LB-51 Sheet 1 of 1 Date(s) 1/M/MDrilled i«w«* Drilling Method Type Hollow Stem Auger CME75 Groundwater Level ^o^ encountered Borehole Backfill Granular bentonlte Logged By Drill Bit Size/Type DrillingContractor SamplingMethod(s) Location P. Tan 6" West Hazmat Drilling ModCal Checked j Wer)e Total Depth e c «M»of Borehole 6'5feet Approximate 31 50 feetSurface Elevation Ji:>-ureci Hammer 140 ,bs/3(J.. drop See Site Plan efo ro £> — a.*-<D m Q) a> LU.S Q^? 2*- 4- -310 J 6~ e- -305 10- 12- 14- SAMPLES OJ !i . | LB-51 -1 OJa. en 1^CQ£ 65 O)o .0 a.(D O MATERIAL DESCRIPTION SANTIAGO FORMATION 4" asphalt over dense, moist, light orange yellow, SAND with clay (SC) - - - - Bottom of boring at 6.5 feet - - - -Water IContent, % j•GQ. >. "w <t>O £•O REMARKS AND OTHER TESTS PID=0, CH,=0, O2=19 PID=0. CH4=0, O2=19 VfMMflP F'9ure C'3 U1O Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA Log of Boring LB-52 Sheet 1 of 1 Date(s) i/9Q/nADrilled »*»«* MeS Hollow Stem Auger QnlJ Rio ^*fcj& 7eType CME75 Groundwater Level Mftf -npn(mt««»riand Date Measured Not «ncoul™»*« Rarkfiii Bentonfte grout co 'TO £ > +- Q.*-(U <D oj 0) LU.fi Q^i 0- -315 2- - 4- I SAMPLES ll I LB-52-1 1-310 6-P - 8- - 10-, I! LB-52-2 -305 -^ 12 I 14- J LB-52-3 Blows perfoot31 14 25 Graphic LogLogged p Tgn Drill Bit R» Size/Type ° cSrlctor West Hazmat Drilling OaffiplinQ U^fe^l/^^lliJtatK/vl/c\ IVIOOwal Checked j Wer|e Total Depth ^ A - f_0.of Borehole i^.oieei Approximate -,.- „ ,„..Surface Elevation 31 6.0 feet Hammer 14Q |bs/30« drop Location See Site Plan MATERIAL DESCRIPTION FILL 4" asphalt over moist, yellow brown, sandy clay -- Moist, olive gray, fine- to medium-grained clayey sand -$— Becomes light brown -f — Becomes olive gray - Moist, green gray, sandy clay, trace gravel — -f — Trace silt - — — f — Becomes greenish gray — - - f — Becomes light yellow tan, trace gravel SANTIAGO FORMATION_ Dense, moist, light gray, fine-grained silty SAND (SU), trace iron staining _ Bottom of bohng at 14.5 feet TTDC WaterContent, %t>Q. V) <D Q O REMARKS AND OTHER TESTS PID=0. CH4=0 PID=0, CrV=0 PID=0, CH4=0 Figure C-4 Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA rVata/c\L/dlcilaJ 4 font/iADrilled T^WW iShod Hollow stem Auger Drill Rig CMF 75Type CME75 Groundwater Level Not encounteredand Date Measured 135* Bentontte grout c_o .Ojlj) 0) 0> 0- -315 2-| 4- SAMPLES if -II LB-53-16HW -310 8^ -i 10- -305 12- 14- , I LB-53-2 II <D CL 17 67 Graphic Log\\%< Log of Boring LB-53 Sheet 1 of 1 Logged p Tan Drill Bit -„ Size/Type ° cSctor WestHazmatDrHling Sampling unrir^aiMethod(s) ""o0^81 Checked j Wer|e Total Depth 11 5 feetof Borehole "-aieet Approximate 317 n ««.,*Surface Elevation ° " -u Teei Hammer 14Q |bs/30» drop Location See Site Plan MATERIAL DESCRIPTION FILL 4" asphalt over moist, light yellow brown, sandy clay -- -f — Becomes dark green gray, trace silt - -f — Becomes dark brownish gray - -- -f — Becomes dark gray, silty clay — - SANTIAGO FORMATION Dense, moist, light grayish white, siity CLAY {CL) Dense, moist, dark gray, SILT (ML) • f — Becomes yellow orange Bottom of boring at 1 1 .5 feet - TTDC WaterContent, %'atc Qe-o REMARKS AND OTHER TESTS PlD=0. CH,=0, PID=0, CH4=0, O; = 21 .8 PID=0, 01^=0, O2=21.8 PID=0, CH,=0, O2=21.8 Figure C-5 Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA Log of Boring LB-54 Sheet 1 of 1 B3S? 1'29'04 B°y"ed P-Tan BS Hollow Stem Auger g£n5pe 6" Type**9 CME 75 cSntractor West Hazmat Drilling Ground Water LGVSl |j/%t anr»mmtarfiH SQITlpling M/vU^Al Checked j Wcr|e Total Depth 11 sf-etof Borehole n.&teet Approximate ,17- fo tSurface Elevation 31'-5»« Hammer 140 lbs/30» drop BaSfi?* Bentontte grout Location See Site Plan c:g to £>*- a.—a> 0 5> <D 0- 2- -315 4- SAMPLES 1 1 -1 1! LB-54-1 6- 1 -310 - • 10 L- - 12- -305 14- I LB-54-2 (O 11 58 .g Q.(D O MATERIAL DESCRIPTION FILL4" asphalt over moist, light greenish gray, sandy clay L - — f — Becomes yellow orange - f — Becomes dark brown - - : _ - - _ SANTIAGO FORMATION Dense, moist, white to light gray, SILT (ML) with iron staining Bottom of boring at 1 1 .5 feet YTDC c § 0 "oQ. "inc0)O O REMARKS AND OTHER TESTS RD=0. CH.=0,O2=19 PID=0, 0^=0, Figure C-6 Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA Log of Boring LB-55 Sheet 1 of 1 gS?> i«»w B?9ed p-Tan S5£ Hollow Stem Auger g^ 6« SJJJ* CME75 Dieter West Hazmat Drilling Groundwater Level w_* anrniinti»r»rt Sampling a—iCMand Date Measured Not encountered Method(s) "we* Backfill16 Bentonfte grout Location See Site Plan Checked j Wer|e Total Depth - - E *„*of Borehole n-areei Approximate -no e ««„«Surface Elevation 31 8.5 feet Hammer 14Q ,bs/30» drop c"_o > *-• Q.-*'_fl) <D fl) ffl 0- 2- -315 4- SAMPLES O F I- 2 I] LB-55-1'1 - 8- -310 10- 1 12- -305 14-j I LB-55-2 t_ Q. S£ 15 55 f.0 Q.ro O MATERIAL DESCRIPTION FILL4' asphalt over moist, yellowish orange, sandy clay - _ : - -$ — Becomes dark brown _ _ - •] SANTIAGO FORMATIONDense, moist, yellow orange, SILT (ML) Bottom of boring at 1 1 .5 feet .YfDC lo t5Q. "toC0>O O REMARKS AND OTHER TESTS PlD=0, CH4=0,O2=19 PtD=0, CH,=0.O2=19 PID=O.CH-0.1,O?=19 Figure C-7 Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA Log of Boring LB-57 Sheet 1 of 1 Drilled3' 2/4/04 By"**1 P' Tan Drilling p..™-* D..**. Dril1 Bit A»Method D'rect Push Size/Type 4 Type™9 Geoprobe Contractor H&P An^'cat 2^Datel!££fed Not encountered Method?) 2" acetate steeves Checked j Wer[e Total Depth i70fPBtof Borehole 12.0 feet Approximate ,-„ e f_a.Surface Elevation •>ltl-:»reei Hammer MAData NA BackS6 Bentonlte fl"*"1 Location See Site Plan o > +* "H.*--<D <D 5> 0* LU.S? Q.S? 0- 2- - 315 4- 6- ' - - 8- -310 10- - 12: -305 14- SAMPLES Q) fl) c ?l S ; ^i ^ I 5 | s si 5 s ^ 5 ! LB-57-1 LB-57-2 LB-57-3 LB-57-4 LB-57-5 LB-57-6 &« S.0 Q.CD (S MATERIAL DESCRIPTION FILL6" asphalt over moist, dark brownish green gray, sandy clay : ~ - - - - • -f — Becomes yellow brown - - - - - - - -i SANTIAGO FORMATION Dense, moist, yellow orange, sandy SILT (ML) with iron staining Bottom of boring at 12 feet TIDC li5 o Dry Density, pcfREMARKS AND OTHER TESTS PID=0, CH4=0,O?=20.8 PID=0, CH^Q. 02-20.8 PID=0, CH^O,O2=20.8 PID=0, C^O.0?-20.8 PID=0, CH,=0. O;=20.8 PID=0, CH,=0, 02=20.8 Figure C-9 Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA Log of Boring Sheet 1 of 1 LB-58 Date(s) 2,4/04Drilled Drilling nirprt Pu«hMethod Direct pusn ^'eRig Geoprobe SS5SOSZA No. encountered ISS?6 Bentonlte groutDaUnllH Logged By Drill Bit Size/Type Drilling Contractor Sampling Method(s) Location P. Tan 4" H&P Analytical 2" acetate sleeves Checked j Wer|e rfltaShoto 14-0feet Approximate IIA t\ f^at Hammer Data See Site Plan NA c"o co £ > *- Q.+*Q) fl) (jj <P UJ i£ O >£ — -315 2- - — - 4- - — " 6- -310 — - 8- - — ' - 10- - — -305 12^ -l - •tAIt SAMPLES fit 0) ^Q. ^ (^ Z JS> * ^ *Sss N * *Nv ^ ^^ *^ ^ **Ns ^ ^sv^ ^^N ^* ssss s 1 LB-58-1 LB-58-2 LB-58-; LB-58-S LB-58-6 IR<iR7LDOO- ( S.io"Sm£ 8*i.0 a.(0 O MATERIAL DESCRIPTION FILL Asphalt over moist, medium brown green gray, sandy clay — — - - " - — " - • -j — Decrease in sand - — - -f — Trace sand — _ _ • - — • -f — Yellow orange, sandy day, trace gravels — • -f — Becomes gray green — - - SANTIAGO FORMATION Dense, moist, light gray to white. SILT (ML) Bottom of boring at 14 feet *-*»Ji"to E 5o •6o. >; v> VQ >, O REMARKS AND OTHER TESTS PID=0, CH4=0, O2=21.8 P)D=0, CH4=0, O2=21.8 PID=0, CK=0, O2=21.8 PID=0, 0^=0, 2 PID=0, CH4=0, 0^21.8 WWW+C* Figure C-10UKa Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA Log of Boring LB-59 Sheet 1 of 1 DriSf 2MM B?"ed P'Tan MeS Direct Push sSffyf* 4" Type**9 Geoprobe Contractor H&P Analytical Groundwater Level M_. __-_,, -*»„,! Sampling -- «™».»*«IM««and Date Measured Not encountered Metr£d<s) 2 acetate sleeves BaSSS1* Bentonite grout Location See Site Plan Checked j Wer|e Total Depth 1n nfo_»of Borehole iu.ure«i Approximate n 7 n footSurface Elevation ° ' ' -u TBBI Hammer MAData ™A _co to £ £|S §••£ LL) i£ O JB 0_, - — - -315 2- - — - 4- - — - 6- - -310 ' 8- - - •in-1U -305 12- 14- SAMPLES 4> <" 1§• 3 h- Z 1 * ^ N h SsS ^» ^NN NSN Ns * N« ^ * * * LB-59-1 LB-59-2 LB-59-3 LB-59-4 i—S. V)5*-So D)o_J o Q.(D O MATERIAL DESCRIPTION FILL Concrete over 2" asphalt war moist, light brown, sandy clay ^ - • -f — With iron staining - — _ - • -~ - - — - • - SANTIAGO FORMATIONDense, moist, tight gray to white, SILT (ML) with iron staining Bottom of boring at 10 feet .- -, TfDC c^*-- S^J So §0 15Q. K £jV> IDo^>o REMARKS AND OTHER TESTS PID=0, CH,=0,Oz=21.9 O;=2l!9 PID=0, CH4=0,O2=21.9 PID=0, Ch,=0. Oj=21.9 PID=0, CH4=0, Oj-21.9 Figure C-11 Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA Log of Boring LB-60 Sheet 1 of 1 Drilled 2/4/04 Drill i no **» ••* •_ MQinQu Type Geoprobe GrounOwater Level ». t anrnimtpredand Date Measured wot encounierea iSS* Bentonite grout _ 5 £JB a) 0)15 - — 2 -315 4- -310 8- 10- 12- -305 14- SAMPLES at M^ z ^ s^ LB-60-1ss i 0a.in %vm£ O) o a.ra O Logged D T__RU * • ' ™" Size^ype 4" Drilling H&P Analvtical Meffildli) 2-acetates.eeves Checked j Wer|e Total Depth , n ,_A.ofBorehble 2.0 feet Approximate ,..7 ^ *--»Surface Elevation •** reet Hammer WAData NA Location See Site Plan MATERIAL DESCRIPTION FILL3" concrete over 2" asphalt over moist, light brown, sandy day ~~ SANTIAGO FORMATION Bottom of boring at 2 feet - - - - - „ - vme - rt «sso *c ,>,*^ 0)c o Q REMARKS AND OTHER TESTS PID=0, CH,=0, O2=20.8 Figure C-12 Project: Proposed Palo mar Airport Redevelopment I oa of Rorinn L B-61 Project Location: 27662028.04000 Project Number: Carlsbad, CA Sheet 1 of 1 gSff »»* £&£ DTect Push ™JeRi9 Geoprobe ^SSStStSA ^t encountered gaSS" Bentonlte grout LoggedBy Drill BitSize/Type DrillingContractor SamplingMethod(s) Location P. Tan 4" H&P Analytical 2" acetate sleeves Checked j Wer)e Total Depth 9 0 feetof Borehole *-u reei Approximate i-IRSfeetSurface Elevation J1B-are«* Hammer fc, AData NA See Site Ptan c.0 (D fl) Q\ fl) 0- - — - 2- -315 4- 6- 8- -310 10- 12- -305 -1 14- SAMPLES 0)il 5 5 LB-61-1 S a. IS O)o Q.(De> i^% MATERIAL DESCRIPTION FILL _ 3" concrete over 2" asphalt over moist, light brown, sandy day - SANTIAGO FORMATION Bottom of boring at 2 feet - - - - — __ - - — — c££ IS §0 CL CQ>Q O REMARKS AND OTHER TESTS PID=0, CH«=0, Oz=20.8 VH%«« Figure C-13 WCW9 Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA Log of Boring LB-62 Sheet 1 of 1 Date(s) -1/29/04Drilled !"»«» MeS Hollow Stem Auger D*J* CME75 Uot encountered BaSfS"6 Bentontte grout Logged By Drill BitSize/Type Drilling Contractor SamplingMethod(s) Location P. Tan 6" West Hazmat Drilling ModCal Checked j Wer)e Total Depth - - f ,of Borehole °-D Teet Approximate 319 0 f tSurface Elevation aia'u reei Hammer 140ibs(301' drop See Site Plan fcco <oTo a>1i> UJ Ijil LJ *tti - 2- -315 4- 6- - 8- -310 10- 12- -305 14- SAMPLES 0D Q. E>; u Z LB-62-1 t_(DQ. co .9.0 32 D)O_J o Q.ffitrO MATERIAL DESCRIPTION FILL Moist, dark to medium brown, sandy day - _ - SANTIAGO FORMATION Dnese, moist, light gray, SILT (ML) with iron staining Bottom of boring at 6.5 feet - - - - - i^ff Cit*S oso <{3 Q._ ps U) d>Q £* Q REMARKS AND OTHER TESTS PID=0, CH,=0, 02=21.1 PID=0, CK=0, O,=21.1 Vm? Figure C-14 Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA Log of Boring LB-63 Sheet 1 of 1 gjjg> 2/4/04 ^9ed pTan Drilling nirert Pi«h Dri" Bit 4"Method w"«K.irus»n Size/Type ^ 0^9 Geoprobe gSlctor H&P Analytical fnTD^MeaSed Mot encountered gjjgjjj 2" acetate sleeves Checked j Wer|e Total Depth 10 „ ^tof Borehole 10.0 feet Approximate 319 0 f tSurface Elevation -113-" reei Hammer ... Data NA BachfiS'6 Bentonfte grout Location See Site Plan c"o ^ 4-* n • '0> Q) Q) <D LLJ.S O.SJ 0_ " — - 2- - — - -315 4- - — - 6- • ~ ~ 8- - -310 ~ 41*1iu — 12- -305 14- SAMPLES u. s. | r- Z *\ \s ^ss5NS ^ ^* ^^ ^> *> ^SSs ss ^s.*; ^s ^ I LB-63-1 LB-63-2 LB-63-2 LB-63-4 LB-63-5 S. V) oo£ o Q.0} <D MATERIAL DESCRIPTION FILL 4" asphalt over moist, light to medium brown, silty day - " — - • — - ~ ' -f — Becomes orange, sandy silt • SANTIAGO FORMATION Dense, moist, light gray to white, SILT (ML), trace iron staining — - • — . _ " — Bottom of boring at 10 feet «- |>0so •J5 Q, "Mc Q O REMARKS AND OTHER TESTS 3ID=0, CH4=0,O2=21.1 PID=0, CH,=0, Oz=21.1 PID=0, 01^=0, 02=21.1 PID=0, CH,=0, O2=21.1 Figure C-15 Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA Log of Boring LB-70 Sheet 1 of 1 g8g> 1/29/04 Bogged p Jan MethSl Hollow Stem Auger Size/Type 6" ?iRlg CME 75 rSSrtnr Wes* Hazmat Drillingi yp™ ounuttdur *•* Groundwater Level M.f -„--..„»„«,* Sampling u~ir»aiand Date Measured Not encountered Method(i) ModCal Checked j Wer,e Total Depth ... - .of Borehole 11-5 feet Approximate ,.,- n .„. Surface Elevation 317-° feet Hammer 14Q |bs/3(),. drop Backfill16 Bentonite grout Location See Site Plan c.0 "5 £ .5)13 0)15 0- - -315 2- 4- SAMPLES il 1! LB-70-1 6jj -310 8- 14- I LB-70-2 &<n 56 50/6"Graphic LogMATERIAL DESCRIPTION FILL Asphalt over moist, yellow orange, sandy clay - - -f— -Becomes light to medium brown - - - - - - SANTIAGO FORMATION Dense, moist, yellow orange with light gray. SILT (ML) Bottom of boring at 1 1 .5 feet TTDC- 52 I5 tiQ. C ffiO O REMARKS AND OTHER TESTS PID=0, 01=0.Oj=21.2 PID=0, CH.=0,O2=21.2 PID=0, CK=0, Q2=21.2 Figure C-16 Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA ffi? 1««* MeB Hollow Stem Auger ?^ CME75 aGn7Dnad.earS£aS Not encountered BaSfiSf6 Bentonite grout co 'ro fi >*> Q.**0> <D a><Duj£ O-ffi — 315 4- - 6- 8- 310 10- 12- -305 14- SAMPLES lypeNumberLB-71-1 LB-71-2 a (O ?*-0 0m£ 29 60 o>o o Ico. 2O Log of Boring LB-71 Sheet 1 of 1 L°aaed PTan Drill Bit fi» SizefType Srfctor West Hazmat Drilling Sampling unriPniMethod® M011031 Location See Site Plan Checked j Wer|e Total Depth - _ f .of Borehole 6.5 feet Approximate 319 0 fo . Surface Elevation •J1S-U W6t Dal™"1** 140lbs/30"drop MATERIAL DESCRIPTION FILL 4" asphalt over moist, light orange, sandy clay -~— Moist, medium brown, sandy day with trace gravel -_ • f — Orange yellow, sandy clay SANTIAGO FORMATION Dense, moist, yellow becoming light gray, SILT (ML) Bottom of boring at 6.5 feet - - _ - - ^c£S 1°SO t5Q. £•toc0>O £•Q REMARKS AND OTHER TESTS PID=0, CH4=0, Oz=21.0 PID=0, CH4=0,O2=21.0 WfVMf Figure C-1 7 Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA Log of Boring LB-72 Sheet 1 of 1 g&B> i«"» MMIhSl Hollow Stem Auger Drill Rig s*uc -IK.Type y CME75 Groundwater Level M . BnroimtoK>riand Date Measured Not encountered $388* Granular bentonlte Logged By Drill Bit Size/Type Drilling Contractor Sampling Method(s) Location P. Tan 6" West Hazmat Drilling ModCal See Site Plan Checked j Wer|e Total Depth K K trt.tof Borehole 6'5feet Approximate 321 0 f tSurface Elevation '"1 M reet Hammer 140 |bs/30" drop co« s> *_• 0 j-iJD <p <j)q) -320 2- 4- -315 6- 8- 10- -310 12- 14- SAMPLES typeNumberLB-72-1 LB-72-2 D.co S^ 50/6" 50/5"Graphic LogMATERIAL DESCRIPTION FILL 4" asphalt over moist, brown, sandy clay - rf — Becomes light brown to orange, fine-grained, silty sand - SANTIAGO FORMATION _ Dense, moist, light brown to orange, SILT (ML) with iron staining _ - -> Bottom of boring at 6.5 feet _ - - - _ si=> ° 15Q. "wc.OO O REMARKS AND OTHER TESTS PID=0, CH4=0. O2=21.1 PID=0, CH,=0, WWW%C Figure C-18 APPENDIX!) Geotechnical Laboratory Testing URS W:\27662028\04000-a-r.doc\11-Feb-04\SDG APPENDIXD Geotechnical Laboratory Testing The materials observed in the borings were visually classified and evaluated regarding strength, compressibility, dry density, and moisture content. The classifications were substantiated in previous investigations by performing grain size analyses and Atterberg limits on representative samples of the soil. The suitability of soils for fill was evaluated by performing compaction and R-value tests. Soil strength was evaluated with correlations between sampler blow counts and density. All testing was performed in general accordance with ASTM standards. The results of the previous laboratory tests are shown at the corresponding sample location on the logs in Appendix A. Results of compaction tests and grain size distribution tests are presented on Figures D-l through Figure D~4. The R-value test results are presented on Figures D-5 and D-6. Results of corrosion potential tests are presented on Figure D-7. For the current investigation, in order to evaluate the suitability of materials for re-use as compacted fill, expansion index testing was performed on selected composite samples. The results of the index tests are summarized in Table D-l. The results of the expansion index tests are presented in Figures D-8 and D-9. Table D-l Summary of Index Testing Parameter Sample Tubes Boring USCS Classification Description Percent Finer than No. 200 sieve Liquid Limit Plasticity Index Expansion Index, El Potential Expansion Testl Samples No. 1 LB-70, LB-71.LB-72 SC Olive Brown Clayey SAND 45.6 39 23 57 Medium Test2 Samples No. 2 LB-70, LB-71.LB-72 SC Yellowish Brown Clayey SAND 38.2 43 22 40 Low URS W\27662028\04000-a-r.doc\11-Feb-04\SDG D-l Test Method: • 124 I ; I ' | 122 12C 11E ?F ne Q.~ iv.c01 -11"o 11' 5 11t 5 10* & 10£a 10^ 10; 10( 91 > _: i _. , .. „. > _. i - • - . - j _ i - j Li 8 COMPACTION CURVE ASTM D 1557 • ASTM D 698 + CA-DWR: S-10 O Other Effort Compaction Procedure: A Specimen Preparation Method: Moist 9 f" 1 ^ 0 — 2PC _ 7*" 1 ^ — 1 f «*if 1 i 2 ^=*=:- 13 Moldi ~ '?- r— -* 14 ng Wat DM e == rC " •* 15 0 i. It i. _ enl •s 16 (c/ 4 >) •v 1 ^ 7 ^ — ^^rn L? 18 stj ft IV A 1 )r es ss I 9 3s= sur urni 2.7 ed sd 2 0 S 0 21 PARTICLE-SIZE DISTRIBUTION CURVE COBBLES I-I 90 CD IU 805 >-ffl 0 60 Z to 50 to< 40a. 1— 30Zmo 20 ttUJ 10a. 0 NOTATION: Exploration No. GB-1 GRAVEL COARSE | FINE 3" 2".1" 3/4" 3A pi — H — !-••^H H SAND COARSE | MEDIUM FINE 4H—pH 0 20 • it SILT OR CLAY 40 60 100 200 U.S. Standard Sieve Size 1. X ^-I 100 10 1 0.1 0,01 0.001 GRAIN SIZE IN MILLIMETERS • Representat we of entire sample T Representat ve of compacted spec men • Repfesenlat ve of compacted spec men and ent re sample Sam No 1 >le Depth (ft) 1-4 OPT. WC 13.5 MAX. DUW (pcf) 116.0 LL P 52 3€ PROJECT NAME: Palomar Airport PROJECT NUMBER: 58-00111062.01 Description and/or Classification Grayish brown Clay with sand (CH) COMPACTION AND INDEX p PROPERTY DATA IGURENo. D-1 SR-400 (05/00) (SNA)cppagbl1 URS Test Method: 124 pr-f 122 — 120 — 118 -- t 116 --I °" I ! I*- 114 —c. 5 no —•*-> — ^ 108 — & 106 — 104 — 102 — 100 ~ 98 LJJ 8 COMPACTION CURVE • ASTM D 1557 • ASTM D 698 + CA-DWR: S-10 O Other Effort Compaction Procedure: A Specimen Preparation Method: Moist 9 1 r 0 2 ~ _ _ ^ t ~~ 11 — a - 12 r "»•• h - .- 13 lold - — ^ .-fc ing ^~- • =• 14 Wa 2^__ ==;: terC sr 15 01 h it ^^_ ent — ^r 6 "^r -- 1 ~i4 7 •rrl JT 18 satur; fc 1 A 1 ItIO rC ea ss \ 9 n - 3s= sur urn fl i 2 ec ed PARTICLE-SIZE DISTRIBUTION CURVE COBBLES GRAVEL COARSE | FINE 3- 2" 1" 3/4" 70 : CD : H : COt/) ' i UJ -w :o ^u . 3/8 *"Ti 4rn-* SAND I COARSE) MEDIUM FINE | «^v SILT OR CLAY 10 20 40 eo 100 200 U.S. Standard Sieve Size 1 --S«^SX\ \\\\•,'1 1 UL .7 2 ^0 3 ~/ 21 100 10 1 0.1 0.01 0.001 GRAIN SIZE IN MILLIMETERS NOTATION'. • Reptesentative of entire sampte * Representative crt compacted specimen • Representative of compacted specimen and enl re sample Exploration Samp No. No. GB-4 2 e Depth (ft) 1-4 OPT. WC 13.5 MAX. DUW (pen 116.0 LL PI Description and/or Classification Brown clayey Sand (SC) PROJECT NAME: Palomar Airport PROJECT NUMBER: 58-00111062.01 COMPACTION AND INDEX F PROPERTY DATA CURE No.D-2 SR-400 (05/00) (SNA)cppagb42 URS Project: Proposed Palomar Airport Redevelopment Project Location: 27662028.04000 Project Number: Carlsbad, CA Log of Boring LB-56 Sheet 1 of 1 gSS> 1/29/04 Methocj Hollow Stem Auger Drill r\IQ f»AAp ^cType CME75 Groundwater Level Mnf *n-mmt««,rfand Date Measured Not encountered BBS* Bentonhe grout | . >*- €.*.0)"$ 0)"$ LU.S> a.2 0- 2- - -315 4- : e ,c g 1 -305 14- SAMPLES cL =s z LB-56-1 LB-56-2 Q. cA 18 55 Graphic LogLogged p TQ», r - 1 01 1Dy SizeH-ype 6" Contractor West Hazmat Drilling Sampling M_-ir.»iMethod(s) mM^at Checked j Wer|e Total Depth - 1 1 f tof Borehole i.areei /TpproxirnaiG IIQ A fAAt Hammer 140 ,bs/30" drop Location See Site Plan MATERIAL DESCRIPTION FILL4' asphalt over moist, medium brown to greenish gray, sandy day _ - - -f — Trace gravel - _ - - : SANTIAGO FORMATION Dense, moist, light orange, SILT (ML) - - Bottom of boring at 1 1 .5 feet - -.-TfDC-WaterContent, %•cQ. 'inc0>Q Q REMARKS AND OTHER TESTS PID=0, CH.=0.O2=21.2 PtD=0, 0^=0, PID=0, CH4=0, O,=21.2 Figure C-8 H ffi S SV 01 -I « Q 1HOI3M AS ONISSVd lN30d3d oooooooo UNIFIED SOIL CLASSIFICATIONO CO O o D) en PARTICLE-SIZE DISTRIBUTION CURVES0) o 0 OQ. ^ < Oi- *-TO *- 1 5-2 <?re co Q. tO LU Of S ^< £z £ 5 iUJ i-~* oO UJce -»Q. OKO. | UNIFIED SOIL CLASSIFICATION ]J SILT AND CLAYQz GRAVEL 1*I IlllSSi J S g i glSSlsS 59 a o o in inin in o i-.UJ •» IN -< <-. O O O O O O O to _ 15 ^A re | j », -, S •„ 5 g j. J § g | | § | | S^UV^O^H | £ (D ^ O O)to f ~° fl1 (O CV) u_ 1H9I3AA A3 ONISSVd iN33H3doOOOOOOOOOO Ulzu. 3aUl Ul0)£ u UJ inttSu HYDROMETERWUJ UJ w U. S. STANDARDoo . oo . o _ •* 1 S' : : : : .... .... .... • . . . . •; ; ; ; . . . . . ~ i . i ft ''/' ' 'f . . . f^L^ f i . . i . .... .... .... '.'.'.'. .... .... . . , , .... .... .... : :jx^*T: : ........ ! ! ! ! .... .... .... .... .... .11. .... .... .... .... £\\\ .... , . . . .... .... • ' • • .... .... III! .... .... .... i i i . -rrt: ............ .... .... ........ .... .... ; ; : : .... ........ .... • • » • ........ . . . .... ». . . . ; ; .... .... •-•!.. ! • • .... f 1 I i .... .... . . . : : : .... : ; : : .... .... .... .... '.'.'.'..... : : : : .... * i .... ..... , . . • • * • .... .... ; : i :........ .... ........ .... ; : : : .... .... .... .... ..... ; : : : ........ ........ -TTt-r ', '. '. ' ' ' • . . 1 .... : i : ; ........ .... .... ........ . . . . : : : ; ........ ........ i i i ! • i < * .... ; : : : .... .... .... .... oIDQ 3 O So so o INOo oo o ind g O Q Q"VIETERSZ UJ N Z oro in o u- O o3 c,g Description and Classifies03o o. _j 1 o en .c "5.QJ Q 6 0 Q. Ero o TO o a.XUJ u O 17o oCO re O •acrew •acatCO 0) (D O C o m to cri in - CD O O 0 3 LL ION CURVESPARTICLE-SIZE DISTRIBUTort Center31Palomar Airp58-001 11062.(ECT NAME:T NUMBER:O uj(T ->0- OULQ. COLt D T) € '£CIcn cccr ^c c c(j < < R - VALUE DATA SHEET PROJECT NUMBER 28689 P.N.58-00111-062.01 BORING NUMBER: GB-4 Bulk 2 @ l'-4' SAMPLE DESCRIPTION: Brown Sandy Silty Clay item Mold Number Water added, grams Initial Test Water, % Compact Gage Pressure, psi Exudation Pressure, psi Height Sample, Inches Gross Weight Mold, grams Tare Weight Mold, grams Sample Wet Weight, grams Expansion, Stability 2, Inches x 10exp-4 000lbs(160psi) Turns Displacement R-Value Uncorrected R-Value Corrected Dry Density, pcf SPECIMEN a 4 216 24.2 30 351 2.43 3086 2120 966 3 70 / 150 4.45 4 4 97.0 b 5 170 20.2 45 503 2.49 3136 2117 1019 7 65 / 148 4.25 5 5 103.2 c 6 270 28.9 30 248 2.47 3052 2122 930 2 72 / 156 5.01 1 1 88.5 DESIGN CALCULATION DATA Traffic Index Assumed: G.E. by Stability G. E. by Expansion 4.0 0.98 0.10 5 or Less Equilibrium R-Value by EXUDATION REMARKS Gf = 1.25 0.0% Retained on the 3/4" Sieve. 4.0 0.97 0.23 Examined & Checked: •«* ,-,"• » , r " " ./fr^[4P^l>ff^;J 4.0 1.01 0.07 3 /12/ 02 '.'.'•/ -L •^Ts^i- — -^/'.• /,• -t- j StepiY^. Maryij>/6CB:r30659 rS^O''-^^-'^-.^-7 The data above is based upon processing and testing samples 'as. f'ec'eivecifrbm the field. Test procedures in accordance with latest revisions to Department of Transportation, State of California, Materials & Research Test Method No. 301. A\:irvin Figure D-5 R - VALUE DATA SHEET PROJECT NUMBER 28689 P.N.58-00111-062.01 BORING NUMBER: GB-10 Bulk 3 @ l'-4' SAMPLE DESCRIPTION: Brown Siity Clay Item Mold Number Water added, grams initial Test Water, % Compact Gage Pressure.psi Exudation Pressure, psi Height Sample, Inches Gross Weight Mold, grams Tare Weight Mold, grams Sample Wet Weight, grams Expansion, Stability 2, Inches x 10exp-4 000lbs(160psi) Turns Displacement R-Value Uncorrected R-Value Corrected Dry Density, pcf SPECIMEN a 10 260 29.2 30 200 2.55 3091 2123 968 16 71 / 151 4.32 3 3 89.0 b 11 190 23.0 50 426 L_ 2.58 3139 2101 1038 19 67 / 146 4.00 6 6 99.1 c 12 164 20.7 65 664 2.43 3143 2117 1026 28 61 / 141 3.58 9 9 106.0 DESIGN CALCULATION DATA Traffic Index Assumed: G.E. by Stability G. E. by Expansion 4.0 0.99 0.53 5 or Less Equilibrium R-Value by EXUDATION REMARKS Gf = 1.25 0.0% Retained on the 3/4" Sieve. 4.0 0.96 0.63 Examined & Checked: ,-*•"' ,. i- - f'-^ — /£ 'M=r~4-; - ; x£%^=f--E^£. 4.0 0.93 0.93 3 /14/ 02 rtiM ^te^n fc. Mamn, IgK 30659 '^ <n ~ ''" / •'* ^ • The data above is based upon processing and testing sarrif)t&^s'/e.ceiygSxfrorn the field. Test procedures in accordance with latest revisions to &gpartm£ht of Transportation, State of California, Materials & Research Test Method No. 301. Laltallc • ittarvin Figure D-6 04-81-82 13=43 WCC SOILS LAB M. J. Scbiff & Associates, Inc. ID=714 973 4834 P.02 Consulting Corrosion Engineers - Since 1959 1308 Monte Vista Avenue, Suite 6 Upland, CA 91786-8224 Phone: 909/931-1360 Table 1 - Laboratory Tests on Soil Samples Palomar Airport Center Your #58-00121062.01, MJS&A W2-0204LAB 5-Mar-02 Sample ID Resistivity as-received saturated PH Electrical Conductivity Units ohm-cm ohm-cm mS/cm Chemical Analyses Cations calcium magnesium sodium Anions carbonate bicarbonate chloride sulfate Other Tests ammonium nitrate sulfide Redox Ca2t Mg2* Na1* C032' HCO3' ci1- so4 2- NH41* NOj1' s2- mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg qual mv GB-l.Bulkl @l-4' 1,400 460 5.4 3.07 1,691 447 2,138 ND 27 495 9,595 na na na na Electrical conductivity in millisiemens/cm and chemical analysis were made on a 1:5 soil-to-water extract, rag/kg = milligrams per kilogram (parts per million) of dry soil. Redox = oxidation-reduction potential in millivolts ND = not detected na = not analyzed Page 1 of 1 Figure D-7 CO oo op CO opcsi poooo ooo poo O)o p C) oCO A O O O a 5 o10 o CM OCM O o o II Vf Hi x"CD "O —cowcCDQ.XLU X 0 x:O) X E3 <1) I $ ,1 ^,CD O "«C CDCLXLJJ m "c0)"5CL % LJJ O O cCDCO>.s.JO O I CO Q.0)a (O P Za.x01 m is 6 B S r Qo g 3E 01o <o•=^ •0. CN UJI UJ< CD Z& IUJ Q. OU.a. . V ' ' ' 5fc C)oo od O)O od o -(0 I UJ CO ExpansionOpin oin op •^ oin oo s op CN o*n ||e«vs % O(O cCO CO>.0)>.jao I en1 0) — oUJ «, CO 5J £ CO Q.Xtu EXPANSION INDEX TESTASTM D 4829Palomar Airport27662028.03000PROJECT NAMEPROJECT NBER APPENDIXE Analytical laboratory Testing URS WA27662028\Q4000-a-r.dOcm-Fet>-04\SDG APPENHIKE Analytical Laboratory Testing Samples from the drilled cuttings were obtained from the storage drums. Two 24-oz composite samples were taken by gathering material from each drum containing soil cuttings accumulated during drilling events. The composite sample collection method involved taking approximately 4 oz. of soil from each drum and compiling each into the jar by hand pushing the jar into the drum of cutting material. The samples were sealed and transported on ice in a cooler to an analytical laboratory. Each sample was tested for Volatile Organic Compounds (VOCs) using (EPA Test Method 8260B) and metals (EPA Test Method Series 6000/7000) to determine whether the drummed cuttings are hazardous or non-hazardous for disposal purposes. The cutting samples tested were found to be non-hazardous. W:\27662028W400Q-a-r.doc\11-Feb-Q4\SDG E- 1 EnviroMatrix I /ML I Analytical, Inc. 11 February 2004 URS Corporation EMA Log #: 0402020 ~\ttn: Priscilla Tan 1615 Murray Canyon Rd Suite #1000 -San Diego, California 92108 Project Name: Palomar Airport Landfill Enclosed are the results of analyses for samples received by the laboratory on 02/03/04 12:41. Samples were analyzed pursuant to client request utilizing EPA or other ELAP approved methodologies. I certify that this data is in compliance both technically and for completeness. "Dan Verdon Laboratory Director CA ELAP Certification #: 1931 4340 Viewridge Avenue, Suite A - San Diego, California 92123 - (858) 560-7717 - Fax (858) 560-7763 Analytical Chemistry Laboratory J Client Name: URS Corporation £MALog#: 0402020 Project Name: Palomar Airport Landfill ~~ ANALYTICAL REPORT FOR SAMPLES | Sample ID Laboratory ID Matrix Date Sampled Date Received ~ SD-1 0402020-01 Soil 02/03/0414:00 02/03/0412:41 SD-2 0402020-02 Soil 02/03/0414:00 02/03/0412:41 -The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. EnviroMatrix Af< lAnalytical, Inc. - ^In- _ _.^_J_- Page2ofl8 -1 Client Name: URS Corporation Project Name: Palomar Airport Landfill EMALog#: 0402020 Metals by EPA 6000/7000 Series Methods 1 Analyte SD-I (0402020-01) Soil Antimony Barium Beryllium .Cadmium Chromium Cobalt Copper Lead Molybdenum Nickel 'Vanadium Zinc Arsenic .Selenium Silver Thallium Mercury SD-2 (0402020-02) Soil Antimony Barium Beryllium Cadmium Chromium Cobalt Copper Lead Molybdenum Nickel Vanadium Zinc Arsenic Selenium Silver Thallium Mercury Result Sampled: 02/03/04 14:00 ND 33.9 1.65 3.55 14.2 ND 20.3 12.1 7.15 11.6 49.0 74.9 11.3 ND ND ND 0.08 Sampled: 02/03/04 14:00 ND 25.9 1.13 2.24 12.9 ND 12.4 ND ND 4.31 39.3 30.6 5.89 ND ND ND ND ReportingLimit Units Dilution Batch Prepared Analyzed Method Notes Received: 02/03/04 12:41 10.0 mg/kg 1 4020511 02/05/04 02/05/04 EPA 6010 1.00 1.00 " " 1.00 " " 1.00 1.00 " " 1.00 " " " " 10.0 " " 5.00 " " 1.00 " " 1.00 " " " " 1.00 " " 0.500 H " 4020410 02/04/04 02/04/04 EPA 6020 1.00 0.100 - - « - » 0.500 .,-.,., ., 0.05 " " 4020510 02/05/04 02/05/04 EPA 7471 Received: 02/03/04 12:41 10.0 mg/kg 1 4020511 02/05/04 02/05/04 EPA 6010 1.00 " " 1.00 " " 1 .00 " " " " " 1.00 1.00 " " " " " 1.00 10.0 " " " " " 5.00 " " 1.00 " " " " 1.00 " " 1.00 " " 0.500 " " 4020410 02/04/04 02/04/04 EPA 6020 1.00 " " 0.100 0.500 0.05 " " 4020510 02/05/04 02/05/04 EPA 7471 —The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. • EnviroMatrix Analytical, Inc. Page 3 of 18 A Client Name: URS Corporation EMALog#: 0402020 Project Name: Palomar Airport Landfill Volatile Organic Compounds by EPA Method 8260B J Analyte SD-1 (0402020-01) Soil Sampled: 02/03/04 — Acetone Acetonitrile Acrolein Acrylonitrile AHyl chloride Benzene Brornobenzene — Bromochloromethane Bromodichloromethane Bromoform Bromomethane *~2-Butanone n-Butylbenzene sec-Butylbenzene __tert-Buty 1 benzene Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane 2-Chloroethyl vinyl ether Chloroform Chloromethane 2-Chlorotoluene 4-Chlorotoluene — 1 ,2-Dibromo-3-chloropropane 1,2-Dibromoethane (EDB) Dibromomethane 1 ,2-Dichlorobenzene 1 ,3-Dichlorobenzene 1 ,4-Dichlorobenzene trans-1 ,4-Dichloro-2-butene i— Dichlorodifluoromethane 1,1-Dichloroethane 1 ,2-Dichloroethane 1,1-Dichloroethene cis-I,2-Dichloroethene trans- 1 ,2-Dichloroethene 1 ,2-Dichloropropane , — 1,3-Dichloropropane 2,2-Dichloropropane 1 , 1 -Dichloropropene Result 14:00 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Reporting Limit Units Dilution Batch Prepared Analyzed Method Notes Received: 02/03/04 12:41 50.0 ug/kg 1 4020401 02/04/04 02/04/04 EPA 8260B 50.0 " " 100 25.0 " " 5.00 " «,. 2.00 " " 2.00 " " 2.00 " " 2.00 .,-..,» ,, 2.00 5.00 50.0 " " " " 2.00 5.00 " " 5.00 5.00 " " " " 5.00 " " " " 2.00 2.00 " " " " " 5.00 5.00 " " 2QQ M M 5.00 " 5.00 " " 5.00 5.00 " " " " " 2.00 2.00 2.00 2.00 2.00 5.00 " 5.00 2.00 " " 2.00 " " " • " » . 2.00 2.00 " " »« " 2.00 2.00 " " 2.00 5.00 5.00 " —The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report mast be reproduced in its entirety. EnvitoMattix [ /t/f,^ J Analytical, Inc. Page 4 of 18 J-Client Name: URS Corporation EM A Log #: 0402020 Project Name: Palomar Airport Landfill Volatile Organic Compounds by EPA Method 8260B 1 \nalyte SD-1 (0402020-01) Soil Sampled: 02/03/04 is-l,3-Dichloropropene rans- 1 ,3-Dichloropropene Diethyl ether Jpthylbenzene iexachlorobutadiene .lexachloroethane 2-Hexanone "odomethane sopropylbenzene Methylene chloride Diethyl tert-butyl ether l-Methyl-2-pentanone Naphthalene n-Propylbenzene — Styrene 1,1,1 ,2-Tetrachloroethane 1 , 1 ,2,2-Tetrachloroethane Tetrachloroethene Toluene 1 ,2,3-Trichlorobenzene 1 ,2,4-Trichlorobenzene —1,1,1 -Trichloroethane 1,1,2-Trichloroethane Trichloroethene Trichlorofluoromethane ~~1 ,2,3-Trichloropropane 1 , 1 ,2-Trichlorotrif!uoroethane 1,2,4-Trimethylbenzene — 1 ,3,5-Trimethylbenzene Vinyl acetate Vinyl chloride m,p-Xylene o-Xylene Surrogate: Dibromofluoromethane Surrogate: 4-Bromofluorobenzene Surrogate: Toluene-d8 Result 14:00 ND ND ND 2.15 ND ND ND ND ND ND ND ND ND ND ND ND ND ND 5.32 ND ND ND ND ND ND ND ND 5.25 ND ND ND 10.9 2.92 ReportingLimit Units Dilution Batch Prepared Analyzed Method Notes Received: 02/03/04 12:41 2.00 ug/kg 1 4020401 02/04/04 02/04/04 EPA 8260B 2.00 " " 5.00 " 1. « II 1. ,, 2.00 " " 2.00 ..«,,» - 2.00 " « .1 10.0 " " 2.00 »«,,« ., 2.00 " " 5.00 2.00 25.0 " " " " 5.00 " " 2.00 " " 2.00 2.00 5.00 " " " " 2.00 2.00 ..,,,« ,. 2.00 " " 2.00 " " 2.00 " " 5.00 " " " H " " 2.00 " " 5.00 5.00 10.0 -,,-„-, „ 2.00 " " 2.00 10.0 5.00 " " 5.00 " " 2.00 " " " " " 101 % 61-14! " " " 106% 70-124 96% 80-121 —^Tie results in this report apply to the samples analyzed in accordance with the chain of wstody document. This analytical report must be reproduced in its entirety. EnviroMatrix | ^k ] Analytical, Inc. ____^^^^^^^^^_________^_ Page 5 of 18 J-Client Name: URS Corporation EM A Log #: 0402020 Project Name: Palomar Airport Landfill Volatile Organic Compounds by EPA Method 8260B J Analyte SD-2 (0402020-02) Soil Sampled: 02/03/04 \cetone \cetonitrile Acrolein -_Acrylonitrile Allyl chloride Benzene Bromobenzene — Bromochloromethane Bromodichloromethane Bromoform ^_Bromomethane 2-Butanone n-Butylbenzene sec-Butylbenzene — tert-Butylbenzene Carbon disulfide Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane 2-ChIoroethylvinyl ether _ Chloroform Chloromethane 2-Chlorotoluene 4-Chlorotoluene l,2-Dibromo-3-chIoropropane 1,2-Dibromoethane (EDB) Dibromomethane 1,2-Dichlorobenzene 1 ,3-Dichlorobenzene 1 ,4-Dichlorobenzene trans-l,4-Dichloro-2-butene — Dichlorodifluoromethane 1,1-Dichloroethane 1,2-Dichloroethane 1,1-Dichloroethene cis-I,2-Dichloroethene trans-1 ,2-Dichloroethene 1 ,2-Dichloropropane — 1,3-Dichloropropane 2,2-Dichloropropane 1 , 1 -Dichloropropene Result 14:00 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ReportingLimit Units Dilution Batch Prepared Analyzed Method Notes Received: 02/03/04 12:41 50.0 ug/kg 1 4020401 02/04/04 02/04/04 EPA 8260B 50.0 " JQQ 25.0 5.00 " " " " 2.00 " " " " 2.00 " " 2.00 " « « « „ 2.00 " " " " 2.00 " " " " 5.00 " " 50.0 " " H " 2.00 " " n " " 5.00 5.00 5.00 " " 5.00 " " 2.00 " " 2.00 5.00 " " 5.00 " " " " 2oo 5.00 " " 5.00 " " " " 5.00 " " 5.00 " " 2.00 2.00 200 " " 2oo " - 2.00 " " 5.00 5.00 " .... n H 2.00 2.00 " 2oo " " 2.00 2oo 2 oo . " - 2.00 " " " " " 5.00 5.00 " " -The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirely. • EnviroMatrix | /SJCk J Analytical, Inc. . Page 6 of 18 Client Name: URS Corporation EMALog#: 0402020 Project Name: Palomar Airport Landfill Volatile Organic Compounds by EPA Method 8260B JAnalyte SD-2 (0402020-02) Soil Sampled: _cis- 1 ,3-Dichloropropene ,rans- 1 ,3-Dichloropropene Diethyl ether Ethylbenzene "Hexachlorobutadiene Hexachloroethane 2-Hexanone lodomethane Isopropylbenzene Methylene chloride Methyl tert-butyl ether ~4-Methy 1-2-pentanone Naphthalene n-Propylbenzene Styrene 1,1,1 ,2-Tetrachloroethane 1 , 1 ,2,2-Tetrachloroethane Tetrachloroethene — Toluene 1 ,2,3-Trichlorobenzene 1 ,2,4-Trichlorobenzene 1,1,1 -Trichloroethane 1,1 ,2-Trichloroethane Trichloroethene Trichlorofluoromethane — 1,2,3-Trichloropropane 1 , 1 ,2-Trichlorotrifluoroethane 1 ,2,4-Trimethylbenzene 1,3,5-Trimethylbenzene ' Vinyl acetate Vinyl chloride m,p-Xylene o-Xylene Surrogate: Dibromofluoromethane Surrogate: 4-Bromofluorobenzene Surrogate: Toluene-d8 Result 02/03/04 14:00 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Reporting Limit Units Dilution Batch Prepared Analyzed Method Notes Received: 02/03/04 12:41 2.00 ug/kg 1 4020401 02/04/04 02/04/04 EPA 8260B 2oo 5.00 .,..-, « 2.00 " " 2.00 " " 2.00 " " 10.0 " " 2.00 " " 2.00 " " 5.00 -..,,,, « 2.00 " " " " 25.0 5.00 " " 2.00 - « . • « 2 AA n » « n n n.00 2.00 " " 5.00 «»,,-- 2oo « » - » 2.00 «-.,,. „ 2.00 2.00 , " 2.00 " " " " 5.00 " " " " 2.00 " " " " 5.00 5.00 10.0 ,- „ „ „ - 2.00 " " " n 2.00 10.0 5.00 5.00 2.00 " " " " 103% 61-141 102 % 70-124 101 % 80-121 The results in this report apply to the samples analyzed in accordance -with the chain of custody document. This analytical report must be reproduced in its entirety. EnvitoMatrix [ ~M^ J Analytical, Inc. Page 7 of 18 •I Client Name: URS Corporation Project Name: Palomar Airport Landfill i Metals ^I jAnalyte by EPA 6000/7000 Series Result Reporting Limit Units EMALog#: 0402020 Methods - Quality Control Spike Source %REC RPD Level Result %REC Limits RPD Limit Notes .Batch 4020410 Blank (402041 0-BLK1) Arsenic ..Selenium Silver Thallium -LCS (4020410-BS1) Arsenic Selenium .Silver Thallium LCS Dup (4020410-BSDJ) Arsenic Selenium Silver Thallium Duplicate (40204 10-DUP1) Arsenic Selenium Silver Thallium Matrix Spike (4020410-MS1) Arsenic Selenium Silver Thallium ND ND ND ND 11.7 10.8 9.69 12.3 11.3 10.2 9.68 11.8 4.96 ND ND ND 14.9 9.98 10.1 10.3 0.500 mg/kg 1.00 0.100 0.500 0.500 mg/kg 1.00 0.100 0.500 0.500 mg/kg 1.00 0.100 0.500 Source: 0402020-02 0.500 mg/kg 1.00 0.100 0.500 Source: 0402020-02 0.500 mg/kg 1.00 0.100 0.500 Prepared & Analyzed: 02/04/04 Prepared & Analyzed: 02/04/04 10.0 117 75-125 10.0 108 75025 10.0 97 75-125 10.0 123 75-125 Prepared & Analyzed: 02/04/04 10.0 113 75-125 3 20 10.0 102 75-125 6 20 10.0 97 75-125 0.1 20 10.0 118 75-125 4 20 Prepared & Analyzed: 02/04/04 5.89 17 20 0.746 20 ND 20 ND 20 Prepared & Analyzed: 02/04/04 9.62 5.89 94 75-125 9.62 0.746 96 75-125 9.62 ND 105 75-125 9.62 ND 107 75-125 -The results in this report apply to the samples analyzed in accordance with the chain of custody document. 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Page 8 of 18 Client Name: URS Corporation Project Name: Palomar Airport Landfill Metals Analyte by EPA 6000/7000 Series Result Reporting Limit Units EMALog#: 0402020 Methods - Quality Control Spike Source %REC RPD Level Result %REC Limits RPD Limit Notes Batch 4020410 Matrix Spike Dup (4020410-MSD1) Arsenic Selenium Silver Thallium Batch 4020510 Blank (4020510-BLK1) Mercury LCS (4020510-BS1) Mercury LCS Dup <4020510-BSD1) Mercury Duplicate (4020510-DUP1) Mercury Matrix Spike (4020510-MS1) Mercury Matrix Spike Dup (40205 10-MSD1) Mercury Batch 4020511 Blank (4020511-BLK1) Antimony Barium Beryllium Cadmium Chromium Cobalt Copper Lead Molybdenum Nickel Vanadium Zinc 15.8 9.96 10.1 10.5 ND 0.48 0.48 ND 0.27 0.25 ND ND ND ND ND ND ND ND ND ND ND 1.29 Source: 0402020-02 0.500 mg/kg 1.00 0.100 0.500 0.05 mg/kg 0.05 mg/kg 0.05 mg/kg Source: 0402020-02 0.05 mg/kg Source: 0402020-02 0.05 mg/kg Source: 0402020-02 0.05 mg/kg 10.0 mg/kg 1.00 1.00 1.00 1.00 1.00 1.00 10.0 5.00 1.00 1.00 1.00 Prepared & Analyzed: 9.62 5.89 9.62 0.746 9.62 ND 9.62 ND Prepared & Analyzed: Prepared & Analyzed: 0.500 Prepared & Analyzed 0.500 Prepared & Analyzed ND Prepared & Analyzed 0.345 ND Prepared & Analyzed 0.345 ND Prepared & Analyzed 02/04/04 103 75-125 6 20 96 75-125 0.2 20 105 75-125 0 20 109 75-125 2 20 02/05/04 02/05/04 96 75-125 02/05/04 % 75-125 0 20 02/05/04 20 02/05/04 78 75-125 02/05/04 72 75-125 8 20 02/05/04 QM-05 QB-01 ^ results in this report apply to the samples analyzed in accordance -with the chain of •ustody document. This analytical report must be reproduced in its entirety. ^^ff '.— EnviroMatrix I mi*1 Analytical, Inc. _ Page 9 of 18 -^Client Name: URS Corporation Project Name: Palomar Airport Landfill i EMALog#: 0402020 ~~ Metals by EPA 6000/7000 Series Methods - Quality Control _j_ \nalyte Result Reporting Limit Units Spike Level Source Result %REC %REC Limits RPD RPD Limit Notes Batch 4020511 JCS(4020511-BS1) Antimony Barium Jeryllium Jadmium Chromium ~"obalt Copper Lead —Molybdenum Nickel Vanadium _Zinc LCSDup (402051 1-BSD1) Antimony — Barium Beryllium Cadmium , Chromium Cobalt Copper Lead Molybdenum Nickel Vanadium 1 Zinc Duplicate (4020511-DUP1) Antimony Barium Beryllium Cadmium Chromium Cobalt Copper — Lead Molybdenum Nickel Prepared & Analyzed: 470 472 102 469 473 485 466 458 490 469 494 457 10.0 mg/kg 1.00 1.00 1.00 1.00 1.00 1.00 10.0 5.00 1.00 1.00 1.00 500 500 100 500 500 500 500 500 500 500 500 500 Prepared & Analyzed 460 460 98.7 458 461 472 452 449 478 458 480 445 ND 38.7 ND 1.22 9.34 ND 7.74 ND ND 3.34 10.0 mg/kg 1.00 1.00 1.00 1.00 1.00 1.00 10.0 5.00 1.00 1.00 1.00 Source: 0402039-02 1 0.0 mg/kg 1.00 1.00 1.00 1.00 1.00 1.00 10.0 5.00 1.00 500 500 100 500 500 500 500 500 500 500 500 500 Prepared & Analyzed — The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. • -"•" EnviroMatrix I A*, lAnalvl 2.75 41.9 0.54 1.28 9.42 ND 7.21 3.47 ND 3.84 tical, Inc. 02/05/04 94 94 102 94 95 97 93 92 98 94 99 91 75-125 75-125 75-125 75-125 75-125 75-125 75-125 75-125 75-125 75-125 75-125 75-125 02/05/04 92 92 99 92 92 94 90 90 96 92 96 89 75-125 75-125 75-125 75-125 75-125 75-125 75-125 75-125 75-125 75-125 75-125 75-125 2 3 3 2 3 3 3 2 2 2 3 3 20 20 20 20 20 20 20 20 20 20 20 20 02/05/04 4 8 2 5 0.9 7 10 14 20 20 20 20 20 20 20 20 20 20 Page 10 of 18 ~J Client Name: URS Corporation Project Name: Palomar Airport Landfill ~ Metals by EPA 6000/7000 Series Analyte Result Reporting Limit Units EM A Log #: 0402020 Methods - Quality Control Spike Level Source Result %REC %REC Limits RPD RPD Limit Notes Batch 4020511 Duplicate (4020511-DUP1) Vanadium Zinc Matrix Spike (4020511-MS1) Antimony Barium Beryllium Cadmium Chromium Cobalt Copper Lead Molybdenum Nickel Vanadium — Zinc Matrix Spike Dup (402051 1-MSD1) Antimony Barium Beryllium Cadmium — Chromium Cobalt Copper Lead Molybdenum Nickel Vanadium Zinc 22.9 18.8 312 443 88.2 404 418 414 403 397 412 406 442 412 295 443 87.1 401 412 411 398 395 405 403 442 408 Source: 0402039-02 ] .00 mg/kg 1.00 Source: 0402039-02 10.0 mg/kg 1.00 1.00 1.00 1.00 1.00 1.00 10.0 5.00 1.00 1.00 1.00 Source: 0402039-02 10.0 mg/kg 1.00 .00 .00 .00 .00 .00 10.0 5.00 1.00 1 .00 1.00 Prepared & Analyzed 24.2 19.0 Prepared & Analyzed 431 431 86.2 43! 431 431 431 431 431 431 431 431 2.75 41.9 0.54 1.28 942 ND 7.21 3.47 ND 3.84 24.2 19.0 Prepared & Analyzec 431 431 86.2 431 431 431 431 431 431 431 431 431 2.75 41.9 0.54 1.28 9.42 ND 7.21 3.47 ND 3.84 24.2 19.0 02/05/04 02/05/04 72 93 102 93 95 96 92 91 96 93 97 91 6 1 75-125 75-125 75-125 75-125 75-125 75-125 75-125 75-125 75-125 75-125 75-125 75-125 20 20 QM-05 : 02/05/04 68 93 100 93 93 95 91 91 94 93 97 90 75-125 6 75-125 0 75-125 1 75-125 0.7 75-125 1 75-125 0.7 75-125 1 75-125 0.5 75-125 2 75-125 0.7 75-125 0 75-125 1 20 20 20 20 20 20 20 20 20 20 20 20 QM-05 -The results in this report apply to the samples analyzed in accordance with the chain of custody document. 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Page 11 of 18 -1 Client Name: URS Corporation Project Name: Palomar Airport Landfill EMALog#: 0402020 Volatile Organic Compounds by EPA Method 8260B - Quality Control _1 Analyte Result Reporting Spike Source %REC RPD Limit Units Level Result %REC Limits RPD Limit Notes Batch 4020401 Blank (4020401 -BLK1) Acetone Acetonitrile Acrolein Acrylonitrile Allyl chloride 1 Benzene Bromobenzene Bromochloromethane — Bromodichloromelhane Bromoform Bromomethanc 2-Butanone n-Butylbenzene sec-Butylbenzene tert-Butylbenzene "~ Carbon disulfide Carbon tetrachloride Chiorobenzene — Chlorodibromomethane Chloroe thane 2-ChloroethylvinyI ether Chloroform Chloromethane 2-Chlorotoluene 4-Chlorotoluene l,2-Dibromo-3-chloropropane 1,2-Dibromoethane (EDB) Dibromomethane — 1 ,2-Dichlorobenzene 1 3-Dichlorobenzene 1 ,4-Dichlorobenzene trans-l,4-Dichloro-2-butene Dichlorodifluoromethane 1,1-Dichloroethane 1 ,2-Dichloroethane 1,1-DichIoroethene cis-l,2-Dichloroethene ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Prepared & Analyzed: 02/04/04 50.0 ug/kg 50.0 100 25.0 5.00 2.00 2.00 2.00 2.00 2.00 5.00 50.0 2.00 5.00 5.00 5.00 5.00 2.00 2.00 5.00 5.00 2.00 5.00 5.00 5.00 5.00 2.00 2.00 2.00 2.00 2.00 5.00 5.00 2.00 2.00 2.00 2.00 •—The results in this report apply to the samples analyzed in accordance with the chain of custody document. 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Page 12 of 18 J-Client Name: URS Corporation Project Name: Palomar Airport Landfill EMALog#: 0402020 Volatile Organic Compounds by EPA Method 82606 - Quality Control _1 Anaiyte Result Reporting Spike Source %REC RPD Limit Units Level Result %REC Limits RPD Limit Notes Batch 4020401 Blank (4020401-BLK1) irans-l,2-Dichioroethene 1 ,2-Dichloropropane 1 ,3-Dichloropropane 2,2-Dichloropropane 1 , 1 -Dichloropropene ' cis- 1 ,3-Dichloropropene trans-l,3-Dichloropropene Drethyl ether , — Ethylbenzene Hexachtorobutadiene Hexachloroethane 2-Hexanone lodomethane Isopropylbenzene Methylene chloride Methyl tert-butyl ether 4-Methyl-2-pentanone Naphthalene — n-Propylbenzene Styrene 1 ,1 ,1,2-Tetrachloroethane ^ 1,1,2,2-Tetrachloroethane Tetrachloroethene Toluene 1 ,2,3-Trichlorobenzene 1,2,4-Trichlorobenzene 1,1,1 -Trichloroethane 1,1,2-Trichloroethane — Trichloroethene Trichlorofluoromethane 1 ,2,3-Trichloropropane 1,1,2-Trichlorotrifluoroethane 1 ,2,4-Trimethylbenzene 1 ,3,S-Trimethylbenzene Vinyl acetate Vinyl chloride m,p-Xylene ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Prepared & Analyzed: 02/04/04 2.00 ug/kg 2.00 2.00 5.00 5.00 2.00 2.00 5.00 2.00 2.00 2.00 10.0 2.00 2.00 ,5.00 2.00 25.0 5.00 2.00 2.00 2.00 5.00 2.00 2.00 2.00 2.00 2.00 5.00 2.00 5.00 5.00 10.0 2.00 2.00 10.0 5.00 5.00 —The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirely. • EnviroMatrix Analytical, Inc. Page 13 of 18 -*- Client Name: URS Corporation EMALog#:0402020 Project Name: Palomar Airport Landfill 1 ~~ Volatile _L Analyte Organic Compounds by EPA Result Reporting Limit Units Method 8260B - Spike Source Level Result Quality Control %REC %REC Limits RPD RPD Limit Notes _3atch 4020401 Jlank (4020401-BLK1) o-Xylene — Surrogate: Dibromofluoromethane Surrogate: 4-Bromqftuorobenzene Surrogate: Toluene-d8 ~LCS(4020401-BS1) Benzene Chlorobenzene 1 , 1 -Dichloroethene Toluene Trichloroethene ^Surrogate: Dibromofluoromethane Surrogate: 4-BromoJluorobenzene Surrogate: Toluene-d8 —Duplicate (402040 1-DUP1) Acetone Acetonitrile Acrolein Acrylonitrile Ally! chloride Benzene Bromobenzene Brotnochloromethane Bromodichloromethane — Bromoform Bromomethane 2-Butanone n-Butylbenzene sec-Butylbenzene tert-Butylbenzene Carbon disulfide ' Carbon tetrachloride Chlorobenzene Chlorodibromomethane — Chloroethane 2-Chloroethylvinyl ether Chioroform The results in this report apply to the samp ND 128 128 121 125 119 87.7 125 118 726 122 121 118 ND ND ND ND ND ND ND ND ND ND ND ND 9.80 ND ND ND ND ND ND ND ND 2.00 ug/kg " " " 2.00 ug/kg 2.00 2.00 2.00 2.00 " " " Source: 0401312-02 50.0 ug/kg 50.0 100 25.0 5.00 2.00 2.00 2.00 2.00 2.00. 5.00 50.0 2.00 5.00 5.00 5.00 5.00 2.00 2.00 5.00 5.00 2.00 Prepared & Analyzed 125 125 125 Prepared & Analyzed 125 125 125 125 125 125 125 125 Prepared & Analyzed 108 ND ND ND ND ND ND ND ND ND ND ND ND 7.98 ND ND ND ND ND ND ND ND 02/04/04 102 61-141 102 70-124 97 80-12! : 02/04/04 100 76-116 95 82-106 70 67-116 100 78-112 94 79-108 101 61-141 98 70-124 97 80-121 : 02/04/04 9 30 30 30 30 30 30 30 30 30 30 30 30 30 20 30 30 30 30 30 30 30 30 30 es analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. — — EnviroMatrix I /»1 Analytical, Inc. Page 14 of 18 -K!lient Name: URS Corporation EM A Log #: 0402020 Project Name: Palomar Airport Landfill 1 " Volatile toalyte Organic Compounds by EPA Reporting Result Limit Units Method 8260B - Spike Source Level Result Quality Control %REC RPD %REC Limits RPD Limit Notes _Batch 4020401 )uplicate(4020401-DUPl) Chloromethane _2-Chlorotoluene -Chlorotoluene . ,2-Dibromo-3-chloropropane 1,2-Dibromoethane (EDB) )ibromomethane ,2-Dichlorobenzene 1 ,3-Dichlorobenzene ~J ,4-Dichlorobenzene rans-l,4-Dich!oro-2-butene Dichlorodifluoromethane _J,l-Dichloroethane 1 ,2-Dichloroethane 1,1-Dichloroethene cis-l,2-Dichloroethene jans-l,2-Dichloroethene 1 ,2-Dichloropropane 1 3-Dichloropropane ~~2,2-Dichloropropane 1 , 1 -Dichloropropene cis- 1 ,3-Dichloropropene — trans-l,3-Dichloropropene Diethyl ether Ethylbenzene Hexachlorobutadiene Hexachloroethane 2-Hexanone lodomethane I sopropylbenzene Methylene chloride Methyl tert-butyl ether — 4-Methyl-2-pentanone Naphthalene n-Propylbenzene Styrene 1 , 1 , 1 ,2-Tetrachloroethane 1,1,2,2-Tetrachloroethane Source: 0401312-02 ND 5.00 ug/kg ND 5.00 ND 5.00 ND 5.00 ND 2.00 ND 2.00 ND 2.00 ND 2.00 ND 2.00 ND 5.00 ND 5.00 ND 2.00 ND 2.00 ND 2.00 ND 2.00 ND 2.00 ND 2.00 ND 2.00 ND 5.00 ND 5.00 ND 2.00 ND 2.00 ND 5.00 ND 2.00 ND 2.00 ND 2.00 ND 10.0 ND 2.00 ND 2.00 10.0 5.00 ND 2.00 ND 25.0 7.22 5.00 3.52 2.00 ND 2.00 ND 2.00 ND 5.00 ~~The results in this report apply to the samples analyzed in accordance with the chain of :ustody document. This analytical report must be reproduced in its entirety. — EnviroMatrix I Ai Prepared & Analyzed ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 9.60 ND ND 5.60 3.02 ND ND ND 1 Analytical, Inc. . 02/04/04 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 4 30 30 30 25 30 15 30 30 30 30 Page 15 of 18 J-Client Name: URS Corporation EMA Log #:0402020 Project Name: Palomar Airport Landfill " Volatile _i. \nalyte Organic Compounds by EPA Result Reporting Limit Units Method Spike Level 8260B - Quality Control Source %REC Result %REC Limits RPD RPD Limit Notes Batch 4020401 )uplicate (4020401-DUP1) j'etrachloroethene _Joluene ,2,3-Trichlorobenzene - ,2,4-Trichlorobenzene 1,1,1 -Trichloroethane "~l , 1 ,2-Trichloroethane rrichloroethene Trichlorofluoromethane • — 1 ,2,3-Trichloropropane 1 ,1 ,2-Trichlorotrifluoroethane 1 ,2,4-Trimethylbenzene 1 ,3,5-Trimethylbenzene Vinyl acetate Vinyl chloride m,p-Xylene 3-Xylene Surrogate: Dibromofluoromethane Surrogate: 4-Bromqfluorobenzene Surrogate: Toluene-d8 Matrix Spike (4020401-MS1) Benzene Chlorobenzene 1,1-Dichloroethene Toluene Trichloroethene Surrogate: Dibromojluoromethane Surrogate: 4-Bromofluorobenzene — Surrogate: To!uene-d8 ND ND ND ND ND ND ND ND ND ND 24.5 17.2 ND ND ND ND 131 122 124 126 123 104 137 121 125 127 128 Source: 0401312-4)2 2.00 ug/kg 2.00 2.00 2.00 2.00 5.00 2.00 5.00 5.00 10.0 2.00 2.00 10.0 5.00 5.00 2.00 " " " Source: 0402020-01 2.00 ug/kg 2.00 2.00 2.00 2.00 " " " Prepared & Analyzed: 02/04/04 ND ND ND ND ND ND ND ND ND ND 30 30 30 30 30 30 30 30 30 30 24.4 0.4 30 125 125 125 13.4 25 ND ND ND ND 105 61-141 98 70-124 99 80-121 30 30 30 30 30 Prepared & Analyzed: 02/04/04 125 125 125 125 125 725 125 125 ND 101 77-127 ND 98 84-114 ND 83 61-129 5.32 105 66-139 ND 97 83-113 100 61-141 102 70-124 102 80-121 —^he results in this report apply to the samples analyzed in accordance with the chain of Custody document. This analytical report must be reproduced in its entirety. • EnvitoMatrix Analytical, Inc. Page 16 of 18 -1 Client Name: URS Corporation Project Name: Palomar Airport Landfill EMALog#: 0402020 Volatile Organic Compounds by EPA Method 8260B - Quality Control _J Analyte Result Reporting Limit Units Spike Level Source Result %REC %REC Limits RPD RPD Limit Notes Batch 4020401 Matrix Spike Dup (4020401-MSD1) Benzene Chlorobenzene 1,1-Dichloroethene Toluene Trichloroethene Surrogate: Dibromqfluorome thane Surrogate: 4-Bromofluorobenzene Surrogate: Toltiene-d8 129 122 89.6 130 118 126 114 123 Source: 0402020-01 2.00 ug/kg 2.00 2.00 2.00 2.00 " " " Prepared & Analyzed 125 125 125 125 125 725 125 125 ND ND ND 5.32 ND 02/04/04 103 98 72 100 94 101 91 98 77-127 84-114 61-129 66-139 83-113 61-141 70-124 80-121 2 0.8 15 5 3 30 30 30 30 30 —The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. • EnviroMatrix Analytical, Inc. Page 17 of 18 Client Name: URS Corporation EMALog#: 0402020 Project Name: Palomar Airport Landfill Notes and Definitions QB-01 The method blank contains analyte at a concentration above the MRL; however, concentration is less than 10% of the sample result, which is negligible according to method criteria. QM-05 The spike recovery was outside acceptance limits for the MS and/or MSD due to matrix interference. The LCS and/or LCSD were within acceptance limits showing that the laboratory is in control and the data is acceptable. ND Analyte NOT DETECTED at or above the reporting limit NR Not Reported dry Sample results reported on a dry weight basis RPD Relative Percent Difference -The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. EnviioMatrix [ ~?lf^ jAnalytical, Inc. Page 18 of 18 URS April 20,2004 Mr. Richard Sax, Esq. c/o Mr. Joe Pate Palomar Airport Center LLC 2192 Palomar Airport Road, Second Floor Carlsbad, CA 92008 Subject:Addendum No. 1 to Geotechnical Investigation Proposed Palomar Airport Redevelopment McClellan-Palomar Airport Carlsbad, California URS Project No. 27662028.04000 Dear Mr. Pate: This addendum provides recommendations regarding the design of concrete floor slabs and pavements for the subject project. URS Corporation (URS) previously performed geotechnical investigations for the site. The results of the geotechnical investigations are presented in our report titled "Geotechnical Investigation, Proposed Palomar Airport Redevelopment, McCIelIan-Palomar Airport, Carlsbad, California," dated February 11,2004. The project structural engineer, Nowak Wiseman, has requested a modulus of subgrade reaction for use in design of rigid floor slabs and pavements. The shallow subgrade soils encountered below the project site consisl of sandy clays and clayey sands. These materials will be scarified and recompacted, or where needed, additional fill soils will be imported. Recommendations for the characteristics of imported fills were provided in Section 4.3.3 of our report. The slabs and pavements should be designed for the condition of the recompacted clays. A subgrade modulus of 150 pounds per square inch/inch may be used for design of the floor slabs and rigid pavements. If you have any questions regarding this letter, please contact us. Please bind this addendum with the February 11,2004 report. Sincerely, URS CORPORATION Leo D. Handfelt, R^TE. 373 Principal Geoiechnical Engineer LDH:afs cc: Jim Wiseman. Nowak Wiseman URS Corporation 1615 Murray Canyon Road Suite 1000 San Diego, CA 92108 Tel: 619.294.9400 Fax: 619.293.7920 W:\27662Q28W4000-c-l.aoc\20-AfX-04\SDG