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CT 11-04; Quarry Creek; Soil and Groundwater Management Plan; 2015-05-19
SOIL AND GROUNDWATER MANAGEMENT PLAN QUARRY CREEK PROJECT 3701 HAYMAR DRIVE CARLSBAD, CALIFORNIA PREPARED FOR: McMillin Land Development 2750 Womble Road, Suite 200 San Diego, California 92106 PREPARED BY: Ninyo & Moore Geotechnical and Environmental Sciences Consultants 5710 Ruffin Road San Diego, California 92123 November 25, 2014 Project No. 104010004 November 25, 2014 Project No. 104010004 Mr. Don Mitchell McMillin Land Development 2750 Womble Road, Suite 200 San Diego, California 92106 Subject: Soil and Groundwater Management Plan Quarry Creek Project 3701 Haymar Drive Carlsbad, California Dear Mr. Mitchell: Ninyo & Moore has prepared this Soil and Groundwater Management Plan (SGMP) for the Quarry Creek Project located at 3701 Haymar Drive, Carlsbad, California. The SGMP should be submitted to the County of San Diego Department of Environmental Health for approval and utilized during construction activities if contaminated or potentially contaminated soils and mate- rials are encountered. We appreciate the opportunity to be of service. Respectfully submitted, NINYO & MOORE Adrian Olivares Senior Project Environmental Scientist Stephan A. Beck, PG 4375 Manager, Environmental Sciences Division AO/SB/gg Distribution: (1) Addressee (1) Ms. Carol Fenner, County of San Diego, Department of Environmental Health 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc i TABLE OF CONTENTS Page 1. INTRODUCTION....................................................................................................................1 2. SITE LOCATION AND DESCRIPTION ................................................................................1 3. SITE CHARACTERIZATION.................................................................................................2 3.1. Site History and Background........................................................................................2 3.2. Site Geology.................................................................................................................4 3.3. Site Hydrogeology........................................................................................................5 3.4. Surface Water................................................................................................................5 3.5. Contaminants of Concern.............................................................................................6 4. DEFINITIONS .........................................................................................................................6 4.1. Materials.......................................................................................................................6 4.2. Contaminated Substance...............................................................................................6 4.3. Hazardous Substance....................................................................................................7 4.4. Hazardous Waste...........................................................................................................7 4.5. Competent Person.........................................................................................................7 4.6. Construction Area.........................................................................................................7 4.7. Project Documents........................................................................................................8 5. PROJECT TEAM.....................................................................................................................8 5.1. Responsible Party.........................................................................................................8 5.2. Regulatory Agency.......................................................................................................8 5.3. Contractor.....................................................................................................................8 5.4. Health and Safety Manager ..........................................................................................9 5.5. Subcontractors ..............................................................................................................9 5.6. Project Environmental Consultant................................................................................9 5.6.1. Project Manager..................................................................................................9 5.6.2. Field Geologist....................................................................................................9 6. NOTIFICATIONS ..................................................................................................................10 7. SITE AND COMMUNITY HEALTH AND SAFETY PLAN...............................................10 8. SOIL EXCAVATION AND MONITORING..........................................................................12 9. SOIL SEGREGATION AND STOCKPILING ......................................................................13 10. SOIL REUSE AND DISPOSAL ............................................................................................13 11. STOCKPILE MANAGEMENT.............................................................................................14 11.1. Best Management Practices........................................................................................15 11.2. Odor and Vapor Control..............................................................................................15 11.3. Stockpile Sampling.....................................................................................................16 11.4. Soil Stockpile Sample Analytical Testing Program....................................................16 11.5. Intrusive Work Monitoring.........................................................................................17 12. GROUNDWATER MANAGEMENT AND DISPOSAL ......................................................18 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc ii 13. TRANSPORT AND DISPOSAL............................................................................................18 14. DOCUMENTATION..............................................................................................................19 15. CONTINGENCY MEASURES.............................................................................................20 16. LIMITATIONS.......................................................................................................................21 17. REFERENCES.......................................................................................................................23 Table Table 1 – Analytical Testing Program............................................................................................17 Figures Figure 1 – Site Location Figure 2 – Site Plan Appendix Appendix A – Community Health and Safety Plan 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 1 1. INTRODUCTION This Soil and Groundwater Management Plan (SGMP) has been prepared for the Quarry Creek Project (Project), located at 3701 Haymar Drive in Carlsbad, California (site) (Figure 1). The site consists of County of San Diego Assessor Parcel Numbers (APNs) 167-040-11 and 167-040-21, which total approximately 155 acres. The former mining and ancillary activities and occupies approximately 52 acres of the site and the remaining portion is generally undeveloped (Figure 2). The former mining and ancillary activities portion of the site was improved with office buildings, two asphalt plants, a concrete batch plant, a recycled material area for asphalt concrete, a rock crushing plant, maintenance shop, a surface mine, bulk materials storage areas, fueling facilities, several storage trailers and fenced areas, two empty explosives magazines/containers, an auxil- iary office building, an office and scale room building, a sales office, a storage building, four aboveground storage tank (AST) areas, and 21 underground storage tanks (USTs). The equip- ment and buildings associated with mining, asphalt production, and fueling have been removed. For projects with known or suspected contamination, and where grading or other soil disturbance activities could encounter contaminated media, USTs, or other unknown contamination or hazards, implementation of an SGMP provides protocols to address hazardous conditions, if encountered, in accordance with local, state, and federal statues, and regulations. This SGMP was developed to as- sist with the planned site development and summarizes the protocol for excavating, trenching, monitoring, segregation, characterization, temporary stockpile sampling/storage, handling, and re- use and/or off-site disposal of soil during construction activities. This SGMP has been prepared in accordance with the County of San Diego, Department of Environmental Health (DEH) and Re- gional Water Quality Control Board (RWQCB) guidelines. 2. SITE LOCATION AND DESCRIPTION The site is located approximately 750 feet southwest of the Haymar Drive and College Boule- vard intersection in Carlsbad, California. The site consists of two parcels totaling approximately 155 acres. The former mining and ancillary activities occupied approximately 52 acres of the site and the remaining portion is generally undeveloped (Figure 2). 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 2 The site was operated as a mine and building materials production facility from the 1950s through approximately 2004. After 2004, the only remaining activity performed was a concrete crushing facility on the south side of Buena Vista Creek. All operations have been discontinued and reclamation, including channelization of Buena Creek, leveling of the site, and regrading of slopes for future residential development has been performed. 3. SITE CHARACTERIZATION This section provides a brief overview of the site history, site characterization, and chemicals of concern (COCs). 3.1. Site History and Background A detailed account of the site history was provided in Brown and Caldwell’s (BC) Request for Residential Closure letter report dated December 20, 2012 (BC, 2012). A summary of BC’s report is provided below. Since the mid 1980s, 21 USTs containing gasoline, diesel and asphalt emulsion fluid have been removed from the site. The site has four closed release cases H02509-001 through - 004, which were overseen by the DEH. COCs for site releases are associated with petroleum hydrocarbons, including gasoline; diesel fuel; benzene, toluene, ethylbenzene, and xylenes (BTEX); methyl tert butyl ether (MTBE); and tert-butyl alcohol (TBA). No work was per- formed under Case -002 and was administratively closed in June 2012. Investigative work performed under Case -001 included over 50 soil borings, installation of 25 groundwater monitoring wells, and 30 quarterly groundwater sampling events. Interim remedial measures included installation of oxygen release compound trenches, excavation, ex-situ bioremediation, and ozone injection in groundwater. Source area mitigation was performed from July 2005 through April 2006 and included the removal of approximately 43,500 cubic yards of petroleum hydrocarbon-impacted soil be- neath the USTs to the capillary fringe or water table. Approximately 500 cubic yards of soil 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 3 containing diesel fuel was left in place in the northeast corner of the UST excavation (Fig- ure 2), since its removal, at that time, would have presented instability issues to adjacent infrastructure, it was a relatively small volume, and located approximately 10 to 20 feet be- low grade. Approximately 17,000 cubic yards of the 43,500 cubic yards was considered “impacted” based on field screening and was placed in biopiles for ex-situ treatment. The remaining soil was stockpiled and subsequently sampled to determine reuse. Sampling of the biopiled soil found that significant reductions in petroleum hydrocarbon concentrations had occurred and that detections were generally confined to the diesel range (TPH-d). The remaining biopiled soil consisted of approximately 11,300 cubic yards with an average concentration of approximately 80 milligrams per kilogram (mg/kg). To remediate impacted groundwater, an ozone sparging system was operated from August 2006 to January 2010 and delivered a mixture of ozone and oxygen into the saturated zone to both chemically oxidize contaminants and increase the oxygen content of the water to promote aerobic biodegradation. Through operation of the ozone system and the source area removal, concentrations of compounds in groundwater were significantly decreased. Based on the observed reductions and trends in contaminant concentrations in groundwater, and the future proposed land use of residential for the site, a final corrective action of natural at- tenuation was proposed in the 2010 BC-prepared Corrective Action Plan (CAP), which was approved by the DEH. In addition to the activities associated with Case -001, three additional locations of petroleum- impacted soil were discovered during reclamation grading at the site in 2011. These locations included soil beneath the former Maintenance Shop, a small area by the former conveyor trench, and the area in the vicinity of the former Asphalt Plant (Figure 2). Investigation and remediation related to these areas of soil impacts were performed under Case -003. The criteria established for remediation included the removal of soil containing concentra- tions of 500 mg/kg TPH-d and 100 mg/kg total petroleum hydrocarbons in the gasoline range (TPH-g), with the removal occurring from the surface to slightly below the water ta- 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 4 ble. Remedial activities resulted in the removal and disposal of approximately 8,135 tons of petroleum hydrocarbon-impacted soil from the three excavations. Approximately 1,600 gal- lons of mixed groundwater and product were recovered from the Asphalt Plant excavation and associated piping and transported off site for disposal. Soil confirmation samples docu- mented the successful removal of TPH-impacted soil at the three excavations. Based on the removal of impacted soil to the cleanup goals and historical groundwater analytical data from near the Asphalt Plant excavation, no additional soil or groundwater assessment or remediation was recommended, and the DEH closed Case -003 in 2012. Case -004 was a voluntary assistance program (VAP) case opened for a determination of land use change to residential and to receive a no further action determination based on residential land use. Exposure pathways of residual contamination from direct exposure to soil and groundwater, consumption of impacted groundwater, and inhalation of indoor air were evalu- ated. BC noted that a minimum of 15 feet of clean fill was placed over groundwater and that potable water would be supplied to future residents by a municipal water district. Therefore, di- rect contact with groundwater was considered an incomplete pathway for future residents. Residual impacted soil was remediated to below the cleanup goal levels, with the exception of approximately 500 cubic yards that was left if place in the northeast corner the UST 1-8 excavation. This material is expected to be located at approximately 20 feet below future pad elevation. Approximately 17,000 cubic yards of biopile soil that was remediated at the site was used as backfill. Approximately 11,300 cubic yards of the soil was used as engi- neered fill for the extension of Marron Road (Figure 2). In a letter dated December 27, 2012, the DEH concurred with the recommendation for a residential land use designation and the case was closed. The DEH noted that any contaminated soil excavated as part of subsurface construction work must be managed according to legal requirements, at that time. 3.2. Site Geology According to the United States Geological Survey (USGS) Geologic Map of Oceanside 30’ x 60’ Quadrangle, California (USGS, 2007), the site is underlain by the following: 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 5 Alluvial flood plain deposits - Active and recently active alluvial deposits along can- yon floors. Consists of unconsolidated sandy, silty, or clay-bearing alluvium. Landslide deposits - Highly fragmented to largely coherent landslide deposits. Uncon- solidated to moderately well consolidated. Santiago Formation - There are three distinctive parts. A basal member that consists of buff and brownish-gray, massive, coarse-grained, poorly sorted arkosic sandstone and conglomerate (sandstone generally predominating). In some areas, the basal member is overlain by a gray and brownish-gray (salt and pepper) central member that consists of soft, medium-grained, moderately well-sorted arkosic sandstone. An upper member consists of gray, coarse-grained arkosic sandstone and grit. Throughout the formation, both vertically and laterally, there exists greenish-brown, massive claystone interbeds, tongues and lenses of often fossiliferous, lagoonal claystone and siltstone. Tonalite - Mostly massive, coarse-grained, light-gray hornblende-biotite tonalite. 3.3. Site Hydrogeology According to the Regional Water Quality Control Board (RWQCB), Water Quality Control Plan for the San Diego Basin, the site is located in the El Salto Hydrologic Subarea (904.21) within the Buena Vista Creek Hydrologic Area of the Carlsbad Hydrologic Unit (RWQCB, 2011). The El Salto HSA has beneficial uses for municipal and agricultural supplies, and po- tential beneficial use for industrial service supply (RWQCB, 2011). According to the CAP prepared by BC (2010), the depth to groundwater at the site ranges from approximately 0.4 to 31 feet bgs at the site. The groundwater flow direction is to the southwest to northwest toward Buena Vista Creek. Groundwater levels, gradient, and flow direction can fluctuate due to seasonal variations, groundwater withdrawal or injection, and other factors. 3.4. Surface Water Based on review of the USGS San Luis Rey Quadrangle topographic map (USGS, 2012), Buena Vista Creek traverses the central portion of the site. 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 6 3.5. Contaminants of Concern COCs are associated with petroleum hydrocarbons, including gasoline; diesel fuel; BTEX; MTBE; and TBA. 4. DEFINITIONS Definitions of key terms used in this SGMP are provided in the following sections. 4.1. Materials For the purposes of this SGMP, the term “materials” refers to contaminated media (e.g., soil, groundwater), wastes, debris, and/or other subsurface materials that may be encountered during the planned construction. 4.2. Contaminated Substance In the context of this plan, a contaminated substance is one that contains a substance, or sub- stances, at concentrations that would: require special training, handling, or the use of personal protective equipment; restrict the end use to protect human health or the environment; be sub- ject to local, state, or federal regulatory requirements; or necessitate an environmentally- related monetary surcharge for handling, transportation, or disposition. When contaminated or potentially contaminated materials are encountered, the material gen- erated will be considered a contaminated substance that may contain chemicals at levels that make it a hazardous substance, or in some cases, a hazardous waste under state and/or fed- eral regulations, until analytical testing confirms otherwise. Protective measures and equipment to reduce or prevent exposures from the contaminated or potentially contaminated materials encountered or generated during this project will be specified in the project health and safety plan, discussed in further detail in Section 7. 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 7 4.3. Hazardous Substance A hazardous substance is any substance that is toxic, corrosive, an irritant, a strong sensi- tizer, flammable, combustible, radioactive, or that may cause personal injury or illness as a proximate result of any customary or reasonable foreseeable handling or use. 4.4. Hazardous Waste A California-hazardous waste is a contaminated substance that meets the definition of hazardous waste as defined in the California Code of Regulations (CCR) Title 22 Sections 66261.20 through 66261.24. A Resource Conservation and Recovery Act (RCRA)-hazardous waste is a contami- nated substance that meets the definition of hazardous waste as defined in 40 Code of Federal Regulations (CFR) Part 261. In addition, various permitted landfill and treatment/disposal facilities may have additional requirements beyond federal and state requirements based on permits issued by local, state, and federal regulatory agencies. 4.5. Competent Person A competent person shall have demonstrated knowledge of, and professional experience in, the observation and documentation of environmental excavating activities, environmental and geologic conditions at the site, and recognition of, and testing for, hazardous materials and conditions. A competent person shall have current Occupational Safety and Health Admini- stration (OSHA) training and certificates, and the experience and authority to respond to changed conditions. Typically, a competent person will be a state-licensed geologist, engi- neer, or health professional with sufficient knowledge of local conditions and environmental regulations, or a person working under the direct supervision of such a geologist or engineer. 4.6. Construction Area The term “construction area” refers to materials that will be disturbed or encountered by project earthwork activities. Work performed under this plan shall be in compliance with the SGMP, the current San Diego County DEH Site Assessment and Mitigation (SAM) Manual, and local, state, and federal regulations. 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 8 4.7. Project Documents The term “Project Documents” refers to any and all documents and communications issued by the client, or its designee(s), and regulatory agencies that are related to the subject project. 5. PROJECT TEAM This section describes the project team relevant to the excavation, handling, transportation, reuse, and, as applicable, offsite disposal of contaminated soils/materials and groundwater encountered at the site. 5.1. Responsible Party QC2, LLC is the responsible party (RP), and will serve as the point of contact and will coor- dinate with the involved parties. 5.2. Regulatory Agency The RP will apply for DEH oversight through the VAP for the excavation, reuse, and dis- posal of contaminated soil and groundwater generated by the project. 5.3. Contractor The Contractor shall be responsible for project construction in accordance with project docu- ments. The Contractor’s scope of work, subject to the project documents, includes excavation, temporary stockpiling, material reuse, offsite disposal, and providing measures to protect worker and public health and the environment from impacts related to the Contractor’s activi- ties. The Contractor shall be responsible for assigning competent, experienced, and qualified personnel to execute the activities described herein, and for selecting and supervising the work of subcontractors assigned to the project. The Contractor shall provide a Site Superintendent, whose responsibilities include site ac- tivities associated with the implementation of this SGMP. 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 9 5.4. Health and Safety Manager The Contractor shall provide a Health and Safety Manager (HSM), who shall be a Certified Industrial Hygienist (CIH), or work under the direct supervision of a CIH, with the appropriate training, certificates, and experience. The HSM shall prepare and sign a site-specific Contrac- tor Health and Safety Plan (HASP) for the project. The HASP shall list the various health and safety-related Contractor personnel, their training, duties, and responsibilities, and their con- tact information. The HASP is discussed in further detail in Section 7. 5.5. Subcontractors The supervision, inspection, and approval of subcontractor work, including ensuring the provisions and protocols of this SGMP, HASP, and Community Health and Safety Plan (CHSP) are followed, will be the responsibility of the Contractor. 5.6. Project Environmental Consultant If undocumented impacted soil is suspected or observed during construction activities, a qualified environmental professional (EP) will monitor excavation activities, provide guidance to the Con- tractor on segregation of waste, and assist in waste characterization and profiling. The EP’s staff is provided below. 5.6.1. Project Manager The EP shall provide a Project Manager to assist the RP in overseeing the environ- mental aspects of the project. The project manager shall be a California-registered geologist or engineer, or a person working under the direct supervision of the registered professional. The project manager shall meet the definition of a “competent person,” as defined in Section 4.5. 5.6.2. Field Geologist The EP shall assign a Field Geologist/Engineer/Scientist to perform excavation monitor- ing, sampling and analysis, and document the temporary stockpiling, reuse, and/or transportation and off-site disposal of soils/materials and/or groundwater. The field geolo- 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 10 gist/engineer/scientist shall meet the definition of a “competent person,” as defined in Section 4.5, and may also be the project manager as described above. 6. NOTIFICATIONS The RP has requested regulatory oversight for this project and approval of this SGMP through the DEH VAP. Regulatory agency notifications and submittals will be the responsibility of the RP and/or Project Environmental Consultant, depending on the specific requirements of the notification. The Contractor will be responsible for the Public Notification Program, which should include the preparation and distribution of notices to immediate residences and businesses (mailed prior to the start of work. Notices must also be posted around the perimeter of the site. At a minimum, the notifications should contain the following information: 1) The name and 24-hour telephone number of the site safety manager and of the person(s) to contact regarding problems (e.g., odors, dust, noise). 2) A brief description of the proposed activities. 3) The dates and times that the work will be conducted and an estimate of when the work will be completed. 4) Any requisite Proposition 65 warnings. Proposition 65 (Section 25249.6 of the Health and Safety Code) requires that a warning be given to any individual who is exposed to a chemical known to cause cancer. Check the current Proposition 65 list for chemicals requiring such warnings. It is anticipated that permits for temporary stockpiling of contaminated or potentially contami- nated soils/materials will not be necessary due to the oversight by the DEH and preparation of this SGMP. It will be the Contractor’s responsibility to ensure that temporary stockpiles are con- structed and maintained according to this SGMP. 7. SITE AND COMMUNITY HEALTH AND SAFETY PLAN Prior to site mobilization, unless directed otherwise by the RP, the Contractor’s HSM shall pre- pare a HASP that provides policies, information, requirements, and guidelines to be followed 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 11 while conducting excavation activities, temporary stockpiling/storage, reuse, handling, and dis- posal of suspect or contaminated waste from the site. The HASP shall be prepared in accordance with the Federal and State OSHA Hazardous Waste Operations and Emergency Response (HAZWOPER) Standards: 29 CFR 1910.120 and 8 CCR Section 5192. The HASP shall provide for contingencies (i.e., unknown environmental conditions may exist at the site and may only be discovered during excavation activities) and be structured to handle a variety of situations that may arise, but be concise enough so that site workers understand the hazards and are able to follow the procedures to reduce the level of risk to the extent practicable. Site personnel working within the exclusion zone, if necessary, shall be trained and current in accordance with the standards provided by HAZWOPER (40-hour initial training with annual updates). Appropriate management personnel shall have eight-hour supervisor training. Addi- tional training will be required for personnel engaged in specialized tasks, as appropriate. Field personnel shall be required to review the HASP and provide written acknowledgement of their review and understanding of the plan and willingness to abide by its requirements. In addition, the Contractor’s HSM, Site Superintendent, or designee will perform and document a daily tailgate safety meeting at the beginning of each workday to discuss relevant task-specific safety issues. The objective of the HASP will be to promote a safe and healthy environment for the workers at the site and the public by minimizing exposure to hazards from site activities and/or releases that may migrate offsite. A Community Health and Safety Plan (CHSP) was developed in accordance with the County of San Diego’s Site Assessment and Mitigation Manual, Section IV and is included as Appendix A. The intent of the CHSP is to protect the public and surrounding land uses from potential health hazards during excavation and remediation activities. This plan will be used in addition to the site-specific Contractor’s HASP, which will further serve to protect the surrounding community, but is intended specifically to protect onsite workers from hazards during such activities. 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 12 8. SOIL EXCAVATION AND MONITORING The Contractor shall be responsible for excavation, handling, and temporary stockpiling of soils/materials in accordance with the project documents, the HASP, this SGMP, CHSP and all applicable local, state, and federal statutes, regulations, and guidelines (e.g., current SAM Man- ual, RWQCB). Excavation, handling, and temporary stockpiling of materials will be performed in a manner that prevents the release of contamination to onsite and offsite areas. As stated ear- lier, the site has four closed cases overseen by the DEH. The soil COCs at the site are TPH-d and THP-g. Based on a residential land use scenario, the cleanup goals for TPH-d are 500 mg/kg and 100 mg/kg for TPH-g. Soil containing residual concentrations of TPH-d (i.e., <500 mg/kg) have been reused at the site (e.g., beneath the extension of Marron Road, Figure 2) and may be en- countered during construction (e.g., utility installation). Because the reuse and placement location of this soil were approved by the DEH, TPH-d impacted soil in these known reuse loca- tions, if encountered, can be placed back in the excavation of its origin at the same location and depth. Any cover at that location shall also be replaced in kind (e.g., two feet of clean fill). Monitoring activities will be performed during soil disturbance activities as follows: Outside Remediation Footprint (Figure 2) – If undocumented (i.e., outside of the known reuse areas, Figure 2) soil staining and/or odors are encountered, the Contractor shall notify the RP and EP, and monitoring will commence in the area suspected contamination is found. Within Former Mine – Monitoring will be performed if work is performed in the known areas with residual contamination (i.e., Marron Road extension and northeast corner of the excavation) and if staining and/or odors are encountered in other areas within the former remediation footprint. The Field Geologist will observe excavation activities using a combination of field screening procedures and indicators, such as distinctive soil discoloration, odor, photoionization detector readings and visual observations (e.g., presence of contaminated materials, such as wastes), as well as experience, to assist the Contractor in identifying and managing the excavated soils and/or materials. 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 13 9. SOIL SEGREGATION AND STOCKPILING If stockpiling of soil is required, the Contractor shall coordinate with the Project Environmental Consultant’s Field Geologist to segregate potentially contaminated, contaminated, and “clean” soils/materials into separate stockpiles as follows: Contaminated: Soils and/or materials that, based on sampling and analysis data and field observations, such as odors and discoloration and/or content, likely are contaminated and will require analytical testing to evaluate the stockpile for possible offsite disposal options. Potentially Contaminated: Soils and/or materials that may not be obviously contaminated based on field observations or may only be minimally contaminated. Analytical testing to evalu- ate the stockpile for onsite/offsite reuse or offsite disposal will be required. Clean: Soil that is not suspected to be contaminated based on the type of material encoun- tered (e.g., formational materials above groundwater in areas without documented contamination or based on confirmation sampling analytical results) and for which visual or field screening indicators of contamination are not observed (e.g., odor). Analytical testing to evaluate the stockpile for potential offsite reuse or disposal options will be required. Should undocumented contamination be encountered during construction, the excavated materi- als will be considered a potential hazardous waste unless determined otherwise by analytical testing. The Contractor shall excavate and place the potentially contaminated and contaminated materials in a pre-determined, onsite stockpile staging area, as discussed in Section 11. 10. SOIL REUSE AND DISPOSAL Excavated materials shall be segregated, stockpiled, sampled, and analyzed as described in Sec- tions 8, 9, and 11. The analytical results will be utilized to make one of the following determinations for onsite reuse, offsite reuse, or disposal: The soils/materials are suitable for onsite reuse (i.e., based on the cleanup criteria for residential land use at the site that were approved by the DEH). However, if there is excess material or on- site reuse is not an option, the material will be subject to offsite reuse or disposal. The soil is suitable for off-site reuse based on regulatory requirements, e.g., the RWQCB’s Order Nos. R9 -2002-0342 and R9-2014-0041. 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 14 The excavated soils/materials are not suitable for onsite or offsite reuse and shall be disposed of offsite at an appropriate facility. Analytical results will be utilized to classify the soil as a non-hazardous, Non-RCRA hazardous (i.e., California hazardous), or RCRA hazardous waste as described in Section 4. Excess “clean” soil that can not be reused may be transported off site for disposal, if approved by the Project Environmental Consultant’s Field Geologist/Engineer/Scientist, and the receiving facil- ity or may be exported for off-site reuse if it meets with the requirements set forth in the RWQCB’s Order No. R9-2014-0041. 11. STOCKPILE MANAGEMENT The staging area and stockpiles will be constructed and managed by the Contractor in accordance with project documents, this SGMP, the HASP, and the Contractor’s Storm Water Pollution Pre- vention Plan (SWPPP). All stockpiles shall be constructed and managed to minimize the release and/or threat of release of contaminants or soil from the stockpile in accordance with current SAM Manual guidelines. Contaminated substance, hazardous substance, and/or hazardous waste stock- piles shall be removed from the site in less than 90 days from the date of starting the stockpile. In general, the stockpiled soils/materials will be: Placed onto a relatively impervious surface, such as asphalt, concrete, or on a 30-millimeter (mil) or thicker high density polyethylene (HDPE) liner. Moistened or otherwise treated (e.g., odor suppressants) to minimize vapors, odors, and dust emissions during stockpiling, as necessary. Securely covered when not in use with an 8-mil or thicker HDPE cover to minimize vapor emissions and prevent run-on and runoff from rain and storm water. Configured in such a manner that surface water runoff from the stockpile does not carry stockpile material and/or leachate beyond the stockpile perimeter containment berm. 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 15 11.1. Best Management Practices The Contractor shall implement Best Management Practices (BMPs) to protect the stock- piles from erosion and storm water run-on and runoff, as presented in the Contractor’s project SWPPP. The BMPs include, but are not limited to, the following: Erosion control. Storm water drainage control. Secondary containment (as applicable). Fugitive emission control of dust and/or vapors. Wind dispersion control. Spill prevention. Inspections, maintenance, notifications, documentation, and reporting. Additional BMPs specified in the project SWPPP. If contaminated and/or potentially contaminated materials are encountered and/or contami- nated or potentially contaminated groundwater is present, then the groundwater, water draining from excavated materials, and water generated from dust suppression will be con- trolled in a manner consistent with the project SWPPP. Surface water runoff will be handled according to the current Construction General Permit, project SWPPP, national pollution discharge elimination system requirements, and other applicable statutes and regulations. The Contractor shall be responsible for implementing BMPs specified in the SWPPP. 11.2. Odor and Vapor Control During construction activities (e.g., trenching, drilling, excavating, maintaining stockpiles, loading, and transportation), if there is a potential to generate odors, the Contractor shall employ odor suppression techniques to mitigate impacts to nearby sensitive receptors (e.g., businesses, residential communities, general public). The Contractor shall implement appropriate means and methods, including application of odor suppression techniques and covering stockpiles and open excavations or trenches prior to leaving the project area at the end of each workday. 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 16 11.3. Stockpile Sampling If stockpile sampling is required, it shall be conducted in conformance with the United States Environmental Protection Agency (USEPA) SW-846 and DEH SAM Manual guide- lines. Only discrete soil samples, rather than composites, shall be collected because of the potential dilution of contaminants. Samples shall be collected randomly on a three- dimensional grid using a random number generator. As discussed in Section 9, there will be three types of stockpiles; clean, potentially contaminated, and contaminated. Based on results of the stockpile sampling and analysis, additional sampling may be required to meet the confidence levels specified in the DEH SAM Manual, Resolution No. R9-2014- 0041 Conditional Waivers of Waste Discharge Requirements or the requirements of the receiv- ing facility; therefore, archiving of samples may be appropriate. Archived samples must be properly preserved and analyzed within the maximum holding time specified in SW-846. The minimum number of discrete samples to be collected and analyzed is listed below. Stockpiles 100 cubic yards (cy) or less: four samples, one from each quarter of the stockpile. Stockpile from 101-500 cy: one sample from each 25 cy, or portion thereof (e.g., a 130-cy stockpile would require six samples). Section the stockpile into 25 cy portions and obtain a sample from each 25 cy portion. Stockpile over 500 cy: sample as per a 101-500 cy stockpile and collect an additional sample for each additional 500 cy, or portion thereof. 11.4. Soil Stockpile Sample Analytical Testing Program Analytical testing will be conducted on stockpiles to characterize the soils/materials for po- tential onsite reuse, offsite disposal/recycling, or offsite reuse, as described below and presented in Table 1. The anticipated analytical testing program is based on information ob- tained from previous investigations and experience conducting similar projects: 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 17 Stockpile samples will be analyzed for TPH extended range by USEPA Method 8015(B)M, BTEX by USEPA Method 8260B, and total lead by USEPA Method 6010B. Samples containing total lead at concentrations equal to or greater than 20 times the tox- icity characteristic leaching procedure (TCLP) criteria will be analyzed by the TCLP to evaluate if the soils and/or materials are a RCRA-hazardous waste. If the TCLP concen- tration is below the established criteria, the sample will be analyzed for the soluble threshold limit concentration (STLC) by the waste extraction test (WET) to evaluate if the soil is a California (i.e., Non-RCRA) hazardous waste. Samples containing total lead at concentrations equal to or greater than 10 times the STLC will be analyzed by the WET to evaluate if the soil is a California-hazardous waste. Additional analytical testing may be required by the DEH, Project Environmental Con- sultant or the receiving disposal/recycling facility. Table 1 – Analytical Testing Program COPC Recommended Reporting Limit Analytical Test Method TPH-g and d 10.0 mg/kg USEPA 8015(B)M VOCs 0.05 to 500 ug/kg depending on compound USEPA 8260B Total Lead 0.5 mg/kg USEPA 6010B Soluble Lead (TCLP) 0.5 mg/ USEPA 6010B Soluble Lead (WET) 0.5 mg/ USEPA 6010B Notes: mg/ - milligrams per liter mg/kg - milligrams per kilogram TCLP - Toxicity Characteristic Leaching Procedure USEPA - United States Environmental Protection Agency WET - Waste Extraction Test Recommended Reporting Limits based on Table 5-12 of the SAM Manual 11.5. Intrusive Work Monitoring The Project Environmental Consultant will be notified by the Contractor at least 48-hours prior to the start or continuation of intrusive work activities that require monitoring by the Field Geologist. The Field Geologist will use screening procedures and indicators (e.g., dis- tinctive discoloration and odor, photoionization detector readings) to segregate contaminated or potentially contaminated soils/materials. 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 18 12. GROUNDWATER MANAGEMENT AND DISPOSAL The depth to groundwater at the site reportedly ranges from approximately 0.4 to 31 feet bgs. The Contractor is responsible for construction dewatering, including, but not limited to, obtain- ing an approved discharge permit through the City of Carlsbad (i.e., sanitary sewer discharges) or the RWQCB (i.e., storm drain discharges), infrastructure associated with dewatering, analytical testing, treatment, disposal, and reporting. Previous investigations have documented elevated concentrations of TPH and VOCs in ground- water samples collected from the site. Therefore, it is possible that extracted groundwater will require treatment prior to being discharged in accordance with the requirements of the approved discharge permit or, if treatment is not feasible or cost effective, may require disposal/recycling as a waste. Should disposal be required, the groundwater will be sampled and analyzed in accor- dance with the accepting facilities requirements. 13. TRANSPORT AND DISPOSAL Transporters and disposal facilities used must be appropriately licensed and/or permitted and properly insured. The Contractor will manage the loading, transportation, and disposal of wastes to an appropriate treatment, disposal or recycling facility. The RP will provide waste profile in- formation and manifests for the disposal of contaminated soil. Manifests will be signed by the RP or designee. The Contractor shall be responsible for the scheduling and transportation of wastes to the appropriate facility. Vehicles entering or leaving the site for loading of contaminated soils and/or materials slated for off- site disposal or reuse shall be tracked and documented by the Contractor. Vehicles shall be decontaminated, as necessary, prior to their departure from the site. Care shall be taken to avoid spill- age of contaminated materials and/or tracking such materials offsite. The Contractor shall maintain a daily log of contaminated substances, hazardous substances, or hazardous wastes removed from the site for disposal. The logs shall include a description of the truck, the date and time the truck left the site, and the destination. The logs shall be accompanied by copies of waste manifests and truck tick- ets that document receipt of the waste at the permitted facility and the weight of each load. 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 19 Hazardous wastes transported offsite for disposal shall be performed in accordance with Depart- ment of Transportation (DOT) Hazardous Material Transportation regulations 49 CFR Parts 171 and 180, 40 CFR Part 262, Subpart B, and Title 22 CCR Section 66262, which involve packaging, placarding, labeling, and manifesting requirements. Hazardous wastes transported offsite shall also have appropriate certification notices per 40 CFR Par 268 and Title 22 CCR Section 66268. Per- sonnel having the required DOT-training shall perform DOT-related functions, if required. Contaminated soils/materials characterized as non-hazardous and that do not exhibit the DOT hazard class characteristics (e.g., explosives, gases, flammable/combustible liquids, flammable solids/spontaneously combustible materials/dangerous when wet materials, oxidizers and organic peroxides, toxic materials and infectious substances, radioactive materials, and corrosive materi- als) are not regulated under DOT rules for hazardous materials transportation. If a material is suspected to be hazardous, it shall be shipped under the appropriate hazard class. Trucks carrying contaminated substances, hazardous substances, or hazardous wastes shall be enclosed such that there are no odor or dust emissions during transportation along the haul route identified in the project specifications/Contractor’s transportation plan. 14. DOCUMENTATION At the end of the project, the Project Environmental Consultant shall prepare a report summarizing monitoring activities, site observations, types and volumes of previously undocumented contami- nated soils and/or materials reused onsite and offsite or disposed offsite, placement locations of previously undocumented contaminated materials reused onsite, and information regarding the dis- covery, location, characterization, handling, and disposition of undocumented contaminated soils and/or materials encountered during intrusive activities. The Contractor will provide accurate in- formation regarding the types, volumes, and destinations of previously undocumented contaminated soils and/or materials reused onsite and offsite or disposed offsite. The report will be signed by the Project Environmental Consultant’s California-registered professional (e.g., Profes- sional Geologist, Professional Engineer). 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 20 In addition, the report will include the following information regarding previously undocumented contaminated media, as appropriate: The location(s) and estimated volume of contaminated soils/materials removed, the area(s) of removal, the results of field screening for segregation, and the stockpile(s) where the soils/materials were temporarily stored, as applicable. An estimate of the volume of material in each stockpile. A description of the sampling process and sample location/selection process for the waste characterization, as applicable. A brief description of the stockpile construction and maintenance, including BMPs. A description of the sampling methodology. A plot plan of the stockpile and sample locations. A copy of the sample results, chain-of-custody documents, and quality assurance/quality control supporting data. A summary of the laboratory results of the stockpile sampling. Statistical calculations for stockpiles greater than 20 cy, if necessary. Placement location, if soils/materials were reused, to be provided by the Contractor. The volume of soils/materials transported and disposed of offsite, including copies of weight tickets and waste manifests, to be provided by the Contractor. Copies of daily truck logs including a description of the truck, the date and time the truck departed the site, and the destination, to be provided by the Contractor. Copies of health and safety monitoring records, including air monitoring analytical data and procedures used to mitigate odors and dust. 15. CONTINGENCY MEASURES If hazardous substances or conditions that present an immediate threat of injury to human health or water quality are encountered (e.g., underground storage tank, asbestos pipe), the Site Superintendent shall secure the area according to the HASP and immediately notify the HSM, Project Environmental Consultant, and RP. The Contractor shall call “911” to summon emergency services, if needed. 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 21 If unknown hazardous substances or conditions are encountered that do not present an immediate threat to human health or water quality, the Site Superintendent will notify the HSM and Project Environmental Consultant. As necessary, the area surrounding the discovery of unknown con- tamination will be isolated and secured by the Contractor with markings, fencing, or a suitable barrier so that construction activities can be excluded from the impacted area. The RP, with assistance from the Project Environmental Consultant, will then decide whether immediate excavation, segregation, stockpiling, containerization, permitting or other activities are warranted. 16. LIMITATIONS This plan has been prepared in general accordance with current regulatory guidelines and the standard-of-care exercised in preparing similar plans in the project area. No warranty, expressed or implied, is made regarding the professional opinions presented in this plan. Variations in site conditions may exist and conditions not observed or described in this plan may be encountered during subsequent activities. Please also note that this plan did not include an evaluation of geo- technical conditions or potential geologic hazards. Ninyo & Moore's opinions and recommendations regarding environmental conditions, as pre- sented in this plan, are based on limited subsurface assessments. Further assessment of potential adverse environmental impacts from past on-site and/or nearby use of hazardous materials may be accomplished by a more comprehensive assessment. Our conclusions, recommendations, and opinions are based on an analysis of work performed by others. It should be understood that the conditions of a site could change with time as a result of natural processes or the activities of man at the subject site or nearby sites. In addition, changes to the applicable laws, regulations, codes, and standards of practice may occur due to govern- ment action or the broadening of knowledge. The findings of this plan may, therefore, be invalidated over time, in part or in whole, by changes over which Ninyo & Moore has no control. 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 22 This document is intended to be used only in its entirety. No portion of the document, by itself, is designed to completely represent any aspect of the project described herein. Ninyo & Moore should be contacted if the reader requires any additional information, or has questions regarding content, interpretations presented, or completeness of this document. This plan is intended exclusively for use by the client. Any use or reuse of the findings, conclu- sions, and/or recommendations of this plan by parties other than the client is undertaken at said parties’ sole risk. 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc 23 17. REFERENCES Brown and Caldwell, 2010, Corrective Action Plan, Prepared for Hanson Aggregates LLC, Carlsbad Facility, 3701 Haymar Road, Carlsbad, California, DEH Case No. H02509-001: dated October 25. Brown and Caldwell, 2012, Request for Residential Closure, Lehigh Hanson Former Carlsbad Facility, 3701 Haymar Road, Carlsbad, California, VAP Case No. H02509-004: dated December 20. California Regional Water Quality Control Board, State Water Resources Control Board, 1994, Water Quality Control Plan, Region 9: updated 2011. County of San Diego, 2005, Department of Health Services, Environmental Health Services, Site Assessment and Mitigation Division, Site Assessment and Mitigation Manual. Kennedy and Tan, 2005, Geologic Map of the Oceanside 30’x 60’ Quadrangle, California, Scale 1:100,000. United States Geological Survey, 2012, San Luis Rey, California: 7.5-minute series (topog- raphic), Scale 1:24,000. SOURCE: 2008 Thomas Guide for San Diego County, Street Guide and Directory; Map © Rand McNally, R.L.07-S-129 NOTE: DIRECTIONS, DIMENSIONS AND LOCATIONS ARE APPROXIMATE 1_104010004_SL.mxd AOB88 55 15 805805 215215 SITE MAP INDEX San DiegoCounty 0 2,400 4,8001,200 SCALE IN FEET QUARRY CREEK PROJECT 3701 HAYMAR DRIVE CARLSBAD, CALIFORNIA SITE LOCATION FIGURE 1PROJECT NO.DATE 104010004 11/14 Public Area(Not a Part)Public Area(Not a Part)HAYMAR RD.STREET BHAYMAR RD.STREET BSTREET DSTREET C (PRIVATE)LEGENDRESIDENTIALPUBLIC USEOPEN SPACEAPPROXIMATE AREA OF TPH-DIMPACTED SOIL USED FORENGINEERED FILLAPPROXIMATE AREA OF FORMER MINEFORMERUSTsPROPOSED EXTENSIONOF MARRON ROADNOTES:TPH-D=TOTAL PETROLEUM HYDROCARBONS AS DIESELFIGURE2QUARRY CREEK PROJECT3701 HAYMAR DRIVECARLSBAD, CALIFORNIAPROJECT NO.104010004DATE0400800SCALE IN FEETNOTE: DIMENSIONS, DIRECTIONS AND LOCATIONS ARE APPROXIMATESITE PLANN11/142 104010004 SP.dwg, Nov 24, 2014, 2:26pm, AOB SOURCE: PLANNING SYSTEMS, DATED 4/03/14. 3701 Haymar Drive November 25, 2014 Carlsbad, California Project No. 104010004 104010004 SGMP.doc APPENDIX A COMMUNITY HEALTH AND SAFETY PLAN COMMUNITY HEALTH & SAFETY PLAN QUARRY CREEK PROJECT 3701 HAYMAR DRIVE CARLSBAD, CALIFORNIA PREPARED FOR: McMillin Land Development 2750 Womble Road, Suite 200 San Diego, California 92106 PREPARED BY: Ninyo & Moore Geotechnical and Environmental Sciences Consultants 5710 Ruffin Road San Diego, California 92123 November 26, 2014 Project No. 104010004 3701 Haymar Drive Appendix A Carlsbad, California Project No. 104010004 104010004 Appendix A.doc 1 INTRODUCTION This Community Health and Safety Plan (CHSP) has been prepared for the Quarry Creek Project (Project), located at 3701 Haymar Drive in Carlsbad, California (site). The CHSP was developed in accordance with the County of San Diego’s Site Assessment and Mitigation Manual, Section IV. The intent of the CHSP is to protect the public and surrounding land uses from potential health hazards during excavation and handling of contaminated soil and groundwater. This plan will be used in addition to the Contractor’s site-specific Health and Safety Plan (under separate cover), which is intended specifically to protect onsite workers from hazards during such activi- ties, and the Soil and Groundwater Management Plan (SGMP), which will further serve to protect the surrounding community. EXPOSURE ASSESSMENT The site was operated as a mine and building materials production facility from the 1950s through approximately 2004. All operations have been discontinued at the site and reclamation, including channelization of Buena Creek, leveling of the site, and regrading of all slopes for fu- ture residential development has been performed. Chemicals of Concern (COCs) are associated with petroleum hydrocarbons, including gasoline; diesel fuel; benzene, toluene, ethylbenzene, and xylenes (BTEX); methyl tert butyl ether (MTBE); and tert-butyl alcohol (TBA). After reme- diation activities, COCs are generally limited to diesel range petroleum hydrocarbons in soil. Because of the site’s history, care must be taken during excavation and dewatering activities to protect surrounding receptors such as businesses and residential communities. Community expo- sures to hazards from site activities and/or releases that may migrate to human and environmental offsite receptors will be minimized. Subsurface disturbance activities associated with the planned residential development include, but are not limited to, grading and installation of public infrastructure (i.e., streets, utilities, drainage). 3701 Haymar Drive Appendix A Carlsbad, California Project No. 104010004 104010004 Appendix A.doc 2 The engineering and administrative controls described in this plan shall be the responsibility of the Contractor and its subcontractors, unless stated otherwise. In addition, the Contractor and its subcontractors have air monitoring responsibilities under 29 Code of Federal Regulations 1910 and Title 8 of the California Code of Regulations. Descriptions of potential impacts, controls, and monitoring are as follows. Site Security Controlled areas will be established by the Contractor prior to commencement of construc- tion activities at the site, using fencing or barricades. Only authorized personnel, with the proper training and personal protective equipment, will be allowed to enter any work area boundaries after they agree to abide by the provisions of the Contractor’s site-specific worker health and safety plan (HASP), and are informed of potential dangers that could be encountered while onsite. Site workers will also be briefed on the requirements of this plan, where necessary for implementation. Dust and Vapor Materials removal, stockpiling of bulk soil and other materials, handling of potentially contami- nated soil or other items, and general excavation can generate airborne dust and vapors that can become a nuisance or a hazard to nearby sensitive receptors. In addition, certain contaminants can adhere or adsorb to various dust particles, resulting in potential offsite impacts. Concentrations of petroleum hydrocarbons in the soil are limited to low concentrations of diesel range hydrocarbons (TPH-d). Due to the low concentrations and vapor pressure of as- sociated compounds in diesel, there is very low potential for volatility. Presently, there are no known chronic health hazards associated with TPHd; however, every precaution to minimize the release of hydrocarbon vapors and dust to the atmosphere will be taken with focus given to dust and vapor suppression. 3701 Haymar Drive Appendix A Carlsbad, California Project No. 104010004 104010004 Appendix A.doc 3 Visible dust will be monitored and controlled at the site by the Contractor during construc- tion activities. Dust and vapors created during movement of the soil, heavy equipment and other vehicles will be mitigated with water. Use of surfactants or other vapor mitigation measures are not anticipated based on the presence of only low concentrations of diesel fuel remaining in certain areas of the site. Since dust suppression will be performed, and there is minimal threat of vapors being generated during movement of the soil, the need for perime- ter environmental monitoring is not anticipated at this time. Noise Noise will be generated from the heavy equipment and trucks operating at the site. Typically, activities will be performed during working hours so no generation of noise during the eve- nings or early morning hours will be occurring. Total Petroleum Hydrocarbons TPH is a generic term based on analytical test procedures for the range of hydrocarbon ma- terials from gasoline through heavier fuel oils. These materials typically consist of n- paraffins, isoparaffins, naphthenes, and aromatics and have been identified in earlier studies and during remediation of soil and groundwater at the site. Encountering significant levels of TPH is not anticipated during intrusive activities at the site. If required, the Contractor has the responsibility to perform real-time monitoring for explosive levels of these constituents during excavation activities for protection of site workers. This monitoring may be supple- mented by using a photoionization detector (PID) for lower levels of these contaminants in the general area of intrusive work. Open Excavations Excavations are expected to be limited to utility trenching. The excavation will be sur- rounded by construction fencing and pedestrian barricades and will be securely locked at the end of each work day to prevent unauthorized entry. 3701 Haymar Drive Appendix A Carlsbad, California Project No. 104010004 104010004 Appendix A.doc 4 Asbestos Containing Material (ACM) ACM has not been identified on site and is not expected, however, if suspect ACM is identi- fied, the Project Environmental Consultant will be notified and work will stop in the area until testing can verify the presence or absence of asbestos. Possible sources of ACM may include buried cementitious pipe (transite) or discarded building materials. Stockpiled Soil Stockpiled contaminated soil is not anticipated for implementation of the project. However, in the event soil stockpiling is necessary, it shall be maintained by the Contractor according to the Soil and Groundwater Management Plan, project specifications, Contractor’s Excavation and Transportation Plan and construction Storm Water Pollution Prevention Plan (SWPPP), and all local state and federal regulations and requirements. When limited soil-intrusive work is performed, the soil may be placed on visqueen and securely covered. Other general methods for the temporary storage of stockpiled soil may include the use of metal, water-tight roll-off bins and the construction of stockpiling areas using multiple liners on concrete or asphalt sur- faces and secured to berms constructed of concrete K-rails or sand bags. Best Management Practices To minimize or prevent the discharge of hazardous or potentially hazardous materials from the subject site, best management practices will be implemented by the Contractor, and all local, state, and federal regulations regarding the handling, storage, transportation, and dis- posal of hazardous or potentially hazardous materials will be adhered to. Vehicles entering and/or exiting the site for loading of wastes and contaminated material slated for disposal shall be tracked by the Contractor through documentation and decon- taminated (where applicable), prior to their departure from the site. Care shall be exercised to avoid spillage of contaminated materials from vehicles leaving the site. 3701 Haymar Drive Appendix A Carlsbad, California Project No. 104010004 104010004 Appendix A.doc 5 In addition, the Contractor will provide water pollution control systems for the site to contain, collect, treat, detain, test, and release site storm water and/or groundwater in accordance with the Contractor’s SWPPP and National Pollutant Discharge Elimination System, and project specifications. EMERGENCY PLANNING In the event of a release, which causes a sudden hazard to life or the environment, the Contractor’s Site Health and Safety Officer (SHSO) and Contractor’s Project Manager must be immediately notified of the health and/or environmental risk. These individuals have the knowledge and inte- grated authorities to cease any activity or condition contributing to the hazard. The Contractor’s SHSO is responsible for notifying the appropriate emergency response agencies. The Contractor’s SHSO will be determined prior to commencement of construction activities, and the applicable contact names and numbers will be posted to report any hazards at the project site. EMERGENCY CONTACTS: POLICE, FIRE, AMBULANCE 911 HOSPITAL Tri-City Medical Emergency Services 4002 Vista Way, Oceanside, California (855) 222-8262 POISON CONTROL CENTER (800) 682-9211 or (619) 543-6000 COUNTY OF SAN DIEGO HAZARDOUS INCIDENT RESPONSE TEAM (858) 505-6700 PROJECT MANAGEMENT CONTACTS: Contractor Project Manager: TBD Contractor Site Health and Safety Officer: TBD Health and Safety Manager: TBD Project Environmental Consultant: TBD 3701 Haymar Drive Appendix A Carlsbad, California Project No. 104010004 104010004 Appendix A.doc 6 PUBLIC NOTIFICATION The Contractor’s SHSO will draft a public notification sheet that will be posted in and around the work area, at all egress entrances and exiting positions. The public notification sheet shall include: Description of the proposed site activities; Project commencement and expected completion dates; All required Proposition 65 warnings; and 24-hour contact names and telephone numbers to report hazards to health or environment