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Home My WebLink About3338B; AGUA HEDIONDA & CALAVERA CREEK DREDGING; SAMPLING & ANALYSIS PLAN; 2001-01-01AEOM Environment Prepared for: US Army Corps of Engineers San Diego Field Office Prepared by. AECO Camarillo, California 60190208-100 January 2011 Sampling and Analysis Plan Agua Hedionda and Calavera Creeks Dredging and Improvements Project Carlsbad, California AEC'OM Environment Prepared for. US Amiy Corps of Engineers San Diego Field Office Prepared by: AECOM Camarillo, California 60190208-100 January 2011 Sampling and Analysis Plan Agua Hedionda and Calavera Creeks Dredging and Improvements Carlsbad, California Jim ickerson,. rogram Man ger Dana Files, PG. 8410 Project Geologist 60190208 January 2011 AECOM Environment iii Contents 1.0 Introduction ...................................................................................................................... 1-1 2.0 Project Description ...... ................................................................................................... 2-1 3.0 Tier I Information .............................................................................................................. 3-1 3.1 Site History...........................................................................................................................3-1 3.2 Previous Sediment Testing..................................................................................................3-2 3.3 Potential Sources of Contamination....................................................................................3-2 4.0 Sediment Compatibility Determination ........................................................................4-1 5.0 Sampling Requirements ................................................................................................. 5-1 5.1 Source Material Sampling ................. . ................................................................................. 5-1 5.2 Receiver Site Sampling ................................. . ...................................................................... 5-1 6.0 Method of Sample Collection and Analysis.................................................................6-1 6.1 Source Material Sample Collection and Analysis...............................................................6-1 6.2 Receiver Site Sample Collection and Analysis ................................................................... 6-1 6.3 Field Notes...........................................................................................................................6-2 6.4 Holding Times ....................................................................................................................... 6-2 6.5 Supplementary Chemical Testing.......................................................................................6-2 7.0 Reporting..........................................................................................................................7-1 8.0 References ....................................................................................................................... 8-1 60190208 January 2011 AECOM Environment iv. List of Figures Figure 1 - Site Location Map Figure 2— Site Plan with Proposed Source Zone Sampling Locations Figure 3— Site Plan with Receiver Site Transect Locations List of Tables Table I - Source Site Sediment Sampling and Analysis Schedule Table 2 - Receiving Site (Encinas Beach) Sediment Sampling and Analysis Schedule List of Appendices Appendix A USACE Permit No. 200601161-CLK dated May 21, 2007 Appendix B Sample Locations and Analytical Results, Ninyo & Moore Sediment Sampling, December 2006 Appendix C Example Receiver Site Sediment Sampling Profile Showing Appropriate Sampling Locations 60190208 January 2011 AECOM Environment I-I 1.0 Introduction AECOM prepared this Sampling and Analysis Plan (SAP) on behalf of The City of Carlsbad (City) for the Agua Hedionda and Calavera Creeks Dredging and Improvements Project in Carlsbad, California (site) (Figure 1). This SAP has been prepared in response to the United States Army Corps of Engineers (USACE) Permit No. 200601161-CLK dated May 21, 2007 (Appendix A). The permit authorizes the City to develop a program to evaluate the feasibility of using unconventional (upland and other sources) discharge materials for fill (nourishment) purposes. The permit requires the Cityto prepare a SAP for each proposed use of the permit. This SAP specifically outlines procedures to evaluate dredge material from Agua Hedionda and Calavera Creeks to be used as replenishment material at the Encinas Beach site located on Carlsbad State Beach in San Diego County, California. This SAP has been prepared in accordance with the Final Sand Compatibility and Opportunistic Use Program (SCOUP) Plan (Moffat & Nichol 2006). The following sections summarize the project description, site history (Tier I information), sampling and analysis requirements, sampling methodology, and reporting. 60190208 January 2011 AECOM Environment 2-1 2.0 Project Description The City of Carlsbad is implementing a Drainage Master Plan (DMP) Update. The Update represents a comprehensive program for the phased and orderly development of drainage infrastructure. The City has identified and initiated design of two DMP Update components, referred to as components B and BN, also collectively known as the Agua Hedionda and Calavera Creeks Dredging and Improvements Project. The Project was evaluated at a project level within the Draft Environmental Impact Report (EIR) for the City of Carlsbad Drainage Master Plan (EDAW 2007). The Project site location is shown in Figure 1. The project location is within the Agua Hedionda Creek Watershed. The boundaries of the property, as shown in Figure 2, include Agua Hedionda and Calavera creeks, both of which are located within and adjacent to the Rancho Carlsbad residential community. The proposed project involves drainage infrastructure modifications and improvements along Agua Hedionda and Calavera creeks to provide enhanced flood protection for the residential community of Rancho Carlsbad, an existing residential mobile home community located east of El Camino Real and south of Cannon Road, in the northeastern section of Carlsbad, California. Over 50 percent of the homes in Rancho Carlsbad are located within the existing limits of the 100-year floodplain and could potentially be subject to flood damage during a major storm event. The implementation of the proposed project would reduce flooding in the Rancho Carlsbad residential community by improving the capacity of Agua Hedionda and Calavera creeks, within Rancho Carlsbad, to contain a 100-year flood event. The project would involve dredging and widening of the channel bottom (approximately 3 to 4 feet deep) using the channel center line as control for the work. Additional work includes slope modifications to accommodate the widening, and the removal of slope obstructions (such as ornamental trees, existing non-operational concrete features, and non-standard retaining walls). The dredge volume generated for the removal is estimated to be around 30,000 cubic yards. New work will entail the placement of rock slope protection and gabion structures (step down features) to reduce or control runoff velocity. A temporary basin will be installed to reduce/capture sediment, as applicable. 60190208 January 2011 AECOM Environment 3-1 3.0 Tier I Information 3.1 Site History The original segments of Agua Hedionda and Calavera creeks were reconstructed as man-made, earthen trapezoidal channels in conjunction with the development of the Rancho Carlsbad community development according to plans dated June 1969. Approximately 1.2 miles of the Agua Hedionda and Calavera creeks were reconstructed as part of the overall development for the Rancho Carlsbad community. In 1998, additional channel enhancement and repair work occurred west of El Camino Real with the construction of Cannon Road Bridge over Agua Hedionda Creek. In December 2005, Ninyo and Moore prepared a limited environmental analysis of sediments in Agua Hedionda Creek. Two transects within the project boundary with approximately six sample locations each were sampled to a depth of two feet below ground surface (bgs). A SAP was not prepared for this work, and the emergency channel dredging conducted in March 2006 (described below) subsequently removed the sample material. In March 2006 emergency channel dredging was conducted in portions of Agua Hedionda and Calavera creeks to provide immediate flood protection for the residential 'community of Rancho Carlsbad. Under emergency provisions, the City issued a Notice of Exemption from the California Environmental Quality Act (CEQA) on February 10, 2006, pursuant to Section 21080(b)(4); 15269(b)(c) of the Public Resources Code. The City obtained the following regulatory authorizations to conduct the emergency flood control dredging: Clean Water Act (CWA) Section 401 Water Quality Certification (06C-007) by the San Diego Regional Water Quality Control Board (RWQCB), California Department of Fish and Game (CDFG) Code Section 1602 Streambed Alteration Agreement Notification No. 1600-2006-0060-R5 (1602), USACE 404 Individual Permit (200600151-KJC), Emergency Coastal Development Permit, issued by the City on February 6, 2006, pursuant to Carlsbad Municipal Code 21.201.190. Emergency dredge work was startedon March 4, 2006; and was completed on March 28, 2006. The total extent of the emergency dredging in Agua Hedionda Creek spanned from the upstream edge of the Cannon Road Bridge to approximately 3,000 feet upstream, 80 feet downgradient of the West Rancho Carlsbad Drive Bridge. The emergency dredge activities were required to address immediate flood control and public safety needs of the Rancho Carlsbad community; however, long-term dredging and improvements for the Agua Hedionda and Calavera Creeksas proposed in the DMP Update must be completed to restore and maintain the flood control capacity of the channels. 60190208 January 2011 AECOM Environment 3-2 3.2 Previous Sediment Testing Previous sediment testing was conducted by Ninyo and Moore in December 2005. The sediment sampling event consisted of two transect locations within Agua Hedionda Creek. The transects each consisted of six sample locations. Samples were collected to a depth of approximately two feet bgs. A SAP was not prepared for the December 2005 sampling event, and the sediments were subsequently removed from the creek during the Emergency Dredging Project conducted in March 2006. The sediment sample collected from CCAH-01 was characterized as light brown, very soft, wet, poorly graded sand with gravel (SP) with the following percentages: 88% sand, 12% gravel, and trace fines. The sample collected from CCAH-02 was characterized as light brown, very soft, wet, well graded sand with silt and gravel (SW-SM) with the following percentages: 94% sand, 5% silt, and 1% gravel. The sediment samples were submitted to Calscience Environmental Laboratories of Garden Grove, California for analysis by US EPA Method 413.2 (Oil and Grease), EPA 8270C (PAHs), and EPA 6020 (Metals —7 elements). Sediment was also submitted to Nautilus Environmental of San Diego, California for fish bio-assay of amphipod Hyalella azteca (EPA Method 600/R-99/064). Additionally, sediment was also analyzed by Ninyo & Moore's in-house laboratory for particle gradation (sieve) analysis and sand equivalent evaluation. The following is a brief summary of results for the sediment samples (CCAH-01 and CCAH-02) collected by Ninyo & Moore during the December 2005 sampling event: Aluminum was detected in CCAH-01 and CCAH-02 at concentrations of 1,460 and 1,540 milligrams per kilogram (mg/kg), respectively. Chromium, copper, lead, nickel and zinc were detected in each sediment sample at concentrations ranging from 1.03 to 9.26 mg/kg. Cadmium was not detected in the sediment samples. With the exception of naphthalene detected in CCAH-01 (0.091 mg/kg), polynuclear aromatic hydrocarbons (PAHs) were not detected in the sediment samples. Oil and grease were detected in CCAH-01 and CCAH-02 at concentrations of 17 and 19 mg/kg, respectively. The mean survival of amphipods exposed to sediment collected from CCAH-01 and CCAH- 02 was 90% and 75%, respectively. Mean survival in the control was 82%. Sample locations and analytical results for the sediment samples collected in December 2005 are included in Appendix B. 3.3 Potential Sources of Contamination The State Water Resource Control Board (SWRCB) Geotracker database was surveyed for potential sources of contamination in close proximity to the project boundaries. The Roberson Ranch, Parcel 3 is located at 4300 College Boulevard (approximately 150 feet northeast of Calavera Creek project boundary). This site received regulatory closure in February of 2005. Potential contaminants of concern are not specified, and there are no uploaded documents for the site. This site is unlikely to have impacted the project site based on the regulatory closure received in February 2005. 60190208 January 2011 AECOM Environment 3-3 Two sites, The Robertson Ranch West, and Peterson Ranch, located at 5056 El Camino Real (approximately 600 feet west/northwest of the site), received regulatory closure in November 2010 and June 2007, respectively. Potential contaminants of concern for both sites are not specified. Based on the cross-gradient location of these sites in relation to the project site (cross/down-gradient), and regulatory closures, it is unlikely these sites have impacted the project site. A former landfill was located at the intersection of El Camino Real and Calaveras Drive (approximately 600 feet southeast of the project site). The site received regulatory closure in March 2005, and potential contaminants of concern are not specified. Based on the former landfill location (cross/down-gradient from the project site) and regulatory closure, it is unlikely the former landfill impacted the project site. 60190208 January 2011 AECOM Environment 4-1 4.0 Sediment Compatibility Determination The Inland Testing Manual (USEPA and USACE 1998) summarizes acceptable grain size criteria and effects of turbidity from fines suspended in the water column, but specifics on the acceptable percentage of fines are not provided. The USACE (1989) developed internal guidelines for determining grain size compatibility of source material to receiving beach material. These guidelines served as the basis for the guidelines summarized in the Final SCOUP Plan. The USACE and USEPA approach for determining the grain size compatibility of potential beach fill material is that the grain size distribution of the source sediment should generally fall within the grain size envelope of the receiving beach profile. The USACE and RWQCB incorporated SCOUP guidelines in their Regional General Permit 67 (USACE and RWQCB 2006) for considering the compatibility of "less-than-optimum" sands for beach placement. "Less-than-optimum" sands are defined as material that is not compatible with the grain size on the dry beach, but is compatible with material within the nearshore portion (between mean lower low water (MLLW) and closure depth) of the receiver beach. The fraction of fines of "less-than- optimum" sands should be within 10% of that of the existing nearshore sediments that exist along the profile. To define the range of sediments on the receiving beach, a grain-size distribution envelope will be developed. The envelope will represent the finest to coarsest gradation curves for the receiving beach samples. Typically, the finest gradation curves are found in the deeper portions of the profile (-12 to -30 feet MLLW) and the coarsest gradation curves are found from the upper dry beach area above 0.0 MLLW. This project will incorporate the SCOUP guidelines to determine the compatibility of source material from Agua Hedionda and Calavera Creeks with the receiving site material (Encinas Beach). The guidelines are summarized below: A composite gradation curve will be developed for the source material and will be compared with the receiving site grain size distribution envelope. If the source material composite gradation curve generally falls within the limits of the grain size distribution envelope developed for the receiving beach, the source material is deemed compatible with the receiving beach material. The source materials should not contain greater than 10% of the fines (percentage that passes the No. 200 sieve) measured at the receiving site without a more detailed review of the source material. SCOUP recommends material with high fines content (greater than 20% fines) could be placed either below the mean high tide line (MHTL) or placed within or slightly beyond the surf zone. Placement below the MHTL will allow the fines to gradually be removed by wave action and currents, and placed where similar sized material is typically found. Bulk chemistry testing will be completed on the source material borings as a screening mechanism for compatibility. If the results from the sampling reveal any constituent to be above USACE established screening levels, further chemical testing may be required. 60190208 January 2011 AECOM Environment 5-1 5.0 Sampling Requirements The following section summarizes the number and location of soil samples to be collected for grain size and chemical analyses. 5.1 Source Material Sampling The number of sample locations proposed for the Agua Hedionda and Calavera Creeks source material was determined by the following equation per USACE (1989): N=(A)112 /50 N is the number of sampling locations and A is the plan area in square yards. Using the equation and the approximate project source zone area (26,438 square yards) results in a minimum of three sample locations. AECOM proposes to advance six borings to further characterize the source material sediments. The proposed source zone soil boring locations are shown on Figure 2. Each source zone soil boring location will be recorded with a global positioning system (GPS). The source zone soil borings will be analyzed for grain size and chemistry. 5.2 Receiver Site Sampling Sediment samples will be collected from the Encinas Beach receiver site to characterize the grain size envelope. Sediments samples will be collected along two transects approximately perpendicular to the shoreline at elevations of approximately +12, +6, 0, -6, -12, -18, -24, and -30 feet MLLW as indicated in SCOUP guidelines. An example receiver site sediment sampling profile is provided in Appendix C. Transect I is proposed at the northern limit of the receiving site and Transect 2 is proposed at the southern limit of the receiving site. Each receiver site sample location will be recorded with a GPS. The transect locations are shown on Figure 3. Per SCOUP guidelines, two profiles should be sampled for a receiving beach one mile in length or less. 60190208 January 2011 AECOM Environment 6-1 6.0 Method of Sample Collection and Analysis 6.1 Source Material Sample Collection and Analysis Source material samples will be collected with a stainless-steel hand auger and placed into laboratory-supplied containers. Dredging is proposed to approximately six feet bgs. The source material soil borings will be advanced to approximately eight feet bgs to account for over-excavation. Soil obtained from the hand auger will be visually inspected and logged consistent with the Unified Soil Classification System (USCS). Soil obtained from 0-8 feet bgs will be composited into one representative sample per soil boring. If visual inspection of the soil indicates significant lithologic change within a borehole, the depth interval(s) of differing soil lithology will be composited into a separate sample. Each container will be sealed, labeled, preserved, and recorded on a chain-of- custody (COC) document pending delivery to the analytical laboratory. Each source site sample will be delivered to an analytical laboratory for one or more of the following analyses: Grain size analysis Total organic carbon (TOC) Percent solids, percent volatile solids, specific gravity If significant TOC is detected in source site samples, additional analyses listed below may be warranted. The samples will be placed on hold pending TOC results and grain size analyses for a subset of the analyses listed below. Sufficient sample volume will be collected from each location to accommodate additional analyses if necessary. These samples will be placed on hold at the laboratory should additional analyses be warranted. Based on observed lithology (fine-grained, dark colored), one sample will be selected for the following constituents. This sample is likely to be collected surface sediment (from 0-1 foot bgs): Total and dissolved sulfides Oil and grease by US EPA 413.2 Total residual petroleum hydrocarbons (TRPH) by USEPA 418.1 Metals by US EPA Method 6020 (As, Cd, Cr, Cu, Pb, Hg (method 7471), Ni, and Zn) Pesticides by US EPA Method 8081, Polychlorinated biphenyls (PCBs) by US EPA Method 8082, Dioxin/furan by US EPA Method 8290 Semivolatile organic compounds (SVOCs) by US EPA Method 8270M Table I outlines the source site sampling schedule. 6.2 Receiver Site Sample Collection and Analysis Receiver site samples will be collected with stainless-steel or Teflon-coated tools and placed in laboratory-supplied containers. The receiver site samples will consist of at least the upper 6-inches of sediment depth as recommended in SCOUP. Vertical elevations on the dry beach will be approximated relative to tide elevation at the time of sampling. A dive gage and fathometer along with predicted tide will be used to estimate bathymetry elevations. Each receiver site sample will be 60190208 January 2011 AECOM Environment 6-2 assigned a unique identifier such as EBN for the north transect or EBS for the south transect. A unique number identifier will also be used to indicate the elevation the sample was collected from such as +12, or -6. Each container will be sealed, labeled, preserved, and recorded on a chain-of- custody (COC) document pending delivery to the analytical laboratory. Each receiver site sample will be delivered to a geotechnical laboratory and analyzed for grain size and sand equivalent evaluation. Table 2 outlines the receiving site sampling schedule. 6.3 Field Notes Field notes will be maintained during sampling and compositing activities. The field notes will include the following: Name of person(s) collecting and logging the samples, General weather conditions, Date and time of collection,. Sample station number and sample description, Deviations from the approved sampling plan, Detailed boring logs consistent with USCS classification system. 6.4 Holding Times The sediment samples will be transported to the laboratories and analyzed within the analytical method specified holding time. Additionally, the sediment samples will be preserved according to the analytical method. . 6.5 Supplementary Chemical Testing The outlined chemical testing above will be conducted as a screening mechanism of the material. If analytical results of the source zone soil samples indicated concentrations exceeding established screening levels, further chemical testing may be triggered. Sediment samples reserved for potential supplementary testing will be stored under COC by the analytical laboratory. 60190208 January 2011 AECOM Environment 7-1 7.0 Reporting Upon completion of field activities, AECOM will prepare a report for submittal to the USACE documenting the findings of the site assessment. The report will include field procedures, observations, a soil boring log, tables, figures, laboratory results, conclusions and recommendations. The report will be prepared under the supervision of and signed by a California Professional Geologist. 60190208 January 2011 AECOM Environment 8-1 8.0 References Moffat & Nichol. 2006. Final Sand Compatibility and Opportunistic Use Program Plan. Prepared for SANDAG and the California Coastal Sediment Management Workgroup, March 2006. Ninyo & Moore. 2006. City of Carlsbad Limited Environmental Analysis, Agua Hedionda Creek, Carlsbad, California. Prepared for The City of Carlsbad. February 10, 2006. USACE. 1989. Requirements for Sampling, Testing and Data Analysis of Dredged Material. Unpublished dated report appended to the June 1989 San Gabriel River to Newport Beach, Beach Replenishment at Surfside-Sunset Beach, Geotechnical Report, US Army Engineer District Los Angeles, Los Angeles, California. USACE/CRWQCB. 2006. Regional General Permit 67 for Discharges of Dredged or Upland Derived Fill Materials for Beach Nourishment. USACE-USEPA. 1998. Evaluation of Dredged Material Proposed for Discharge in Waters of the U.S. - Testing Manual. Inland Testing Manual. February 1998. 60190208 January 2011 AECOM Environment Figures 60190208 January 2011 S 550 I ç I cJ ) 5 '/ .s 55 ., 5 55555 55 CS) . . '-5. . 5... 55 5j, .s 55155// /0 55. -. S - IC S 55S' 555 (5 I5I LII SITE LOCATION MAP II L Z!GIDBT' I IG,.I II X DPAWNor. OES1ON: I DATE: I II IuI CARLSBAD DREDGING SUPPORT II I AECOM X I I I AGUA HEDIONDAAND CALAVERA CREEKS SAP I22OAVENIDAACASO cHEOCEDBVC I I Ii CARLSBAD. CALIFORNIA CAMARILLO.CAJ.IFORNIA9302 x I PHONE: (805) 388-3775 II PPRDJEDBY5 I II I sCAI.E: DATE I PROJECT NUMBER I 011071 I 60190208.300 FAX: (805) 388.3577 I AS SHOWN WEB: HTTPIIWWW.AECOH.COM X I FIGURE NUMBER 2 SHEET NUMBEIE x I ICESMEDW. II Ij I APPROXIMATE TRANSECT LOCATIONS II A'COM x I up I ki c. I CARLSBAD DREDGING SUPPORT II I I _____________________________ i I AGUAHEDIONDAAND CALAVERA CREEKS SAP II coi x I I XII 8-I 1z IC CARLSBAD, CALIFORNIA I22OAVENIDAACASO CHEOIEOBY I I I I] CAMARILLO, CALIFORNIA 92012 I I I I SCALE: I DATE I PROJECT NUMBER PHONE: (005) 3884775 FM : (805) 388-3577 PPRCfEDBY d I I I I I I I AS SHOWN 1 011071 I 60190208-300 WEB: HTTP:IMMW.AEOM.OM 8 I I I I AECOM Environment Tables 60190208 January 2011 Table I Source Site Sediment Sampling and Analysis Schedule Aqua Hedionda and Calavera Creeks Dredging and Improvements Project Carlbad, California BORING LOCATION SAMPLE ID COMPOSITE DEPTH INTERVAL PROPOSED LABORATORY ANALYSIS (ft bgs) (ft bgs) Grain Size Analysis SMI-0-8 0-8 Percent solids, percent volatile solids, specific gravity Total Organic Carbon (TOC) Total dissolved sulfides Oil and grease (EPA 413.2) SMI TRPH (418.1) SMI-0-1 0-1 Metals (6020) Pesticides (8081) PCBs (8082) Dioxin/Furan (8290) SVOCs (8270M) Grain Size Analysis SM2 5M2-0-8 0-8 Percent solids, percent volatile solids, specific gravity Total Organic Carbon (TOC) Grain Size Analysis SM3 SM3-O-8 08* Percent solids, percent volatile solids, specific gravity Total Organic Carbon (TOC) Grain Size Analysis SM4 SM4-O-8 08* Percent solids, percent volatile solids, specific gravity Total Organic Carbon (TOC) Grain Size Analysis SMS 5M5-O-8 . 0-8 Percent solids, percent volatile solids, specific gravity Total Organic Carbon (TOC) Grain Size Analysis SM6 5M608 O& Percent solids, percent volatile solids, specific gravity Total Organic Carbon (TOC) EXPLANATIONS: = Depth intervals may vary based on observed lithology (ft. bgs) = Feet below ground surface 60190208 1 of 2 AECOM Table 2 Receiving Site (Enemas Beach) Sediment Sampling and Analysis Schedule Ague Hedionda and Calavera Creeks Dredging and Improvements Project Caribad, California TRANSECT LOCATION DEPTH ABOVE/BELOW MLLW (ft.) SAMPLE ID COMPOSITE DEPTH INTERVAL (inches bgs) PROPOSED LABORATORY ANALYSIS ESN 12 EBN+12 0-6" Grain Size Analysis 6 EBN+6 -" I Grain Size Analysis 0 I EBNO 0-6" Grain Size Analysis -6 EBN-6 0-6" Grain Size Analysis -12 EBN-12 0-6" Grain Size Analysis -18 EBN-18 0-6" Grain Size Analysis -24 EBN-24 0.6" Grain Size Analysis -30 EBN-30 0-6" Grain Size Analysis EBS 12 EBS+12 06" Grain Size Analysis 6 EBS+6 0-6" Grain Size Analysis 0 EBSO 0-6" Grain Size Analysis -6 EBS-6 0-6" Grain Size Analysis -12 I EBS-12 0-6" Grain Size Analysis -18 EBS18 06" Grain Size Analysis -24 EB524 06" Grain Size Analysis -30 I EBS-30 I 0-6" I Grain Size Analysis EXPLANATIONS: MLLW = Mean lower low water 60190208 2 of 2 AECOM AECOM Environment Appendix A - USACE Permit No. 200601161 -CLK dated May 21, 2007 60190208 January 2011 DEPARTMENT OF THE ARMY LOS ANGELES DISTRICT, CORPS OF ENGINEERS SAN DIEGO FIELD OFFICE 16885 WEST BERNARDO DRIVE, SUITE 300A SAN DIEGO, CALIFORNIA 92127 REPLY TO ATIENIION OF: May 21, 2007 Office of the Chief Regulatory Branch City of Carlsbad Attention: Steven Jantz 1635 Faraday Ave. Carlsbad, California 92008 Dear Mr. Jantz: Reference is made to your application (No. 200601161-CLK) dated April 28, 2006 for a Department of the Army Permit. Enclosed are two copies of the permit authorizing you to replenish the Encinas Beach site located on Carlsbad State Beach in San Diego County, California. The City proposes to place approximately 150,000 cubic yards per year (cy/yr) of material on- or in the near-shore environment at the Encinas Beach site (Figure 2). The impact to Waters of the U.S. is 7.3 acres. The permit will be valid for 10 years from date of issuance. THIS PERMIT WILL NOT BECOME VALID UNTIL YOU HAVE TAKEN ALL OF THE FOLLOWING STEPS: 1.The owner or authorized responsible official must sign and date the both copies of the permit indicating that he/she agrees to the work as described and agrees to comply with all conditions stated in the permit. 2.The signer's name and title (if any) must be typed or printed below the signature. 3.Both signd copies of the permit must be returned to the-Corps of Engineers at the above address (Attention: CESPL-CO-R). Upon receipt of the signed copies, the Corps of Engineers will sign and forward one of the copies back to you. 4.When returning the signed copies of the permit, include a check for the processing fee of $100, payable to the Finance and Accounting Officer USAED LA. Furthermore, you are hereby advised that the Corps of Engineers has established an Administrative Appeal Process which is fully described in 33 CFR Part 331. The complete appeal process is diagrammed in the enclosed Appendix B. -2- If we do not receive the signed copies of the permit within 60 days from the date of this letter, your request for the proposed work will be withdrawn. We have also enclosed pre-addressed postcards for you to notify this office regarding the dates for beginning and completing the authorized activity. Sincerely, Robert R. Smi Senior Project er Regulatory Division LOS ANGELES DISTRICT U.S. ARMY CORPS OF ENGINEERS Permittee: City of Carlsbad Permit Number. 200601161-CLK Issuing Office: Los Angeles District Note: The term "you" and its derivatives, as used in this permit, means the permittee or any future transferee. The term "this office" refers to the appropriate district or division office of the Corps of Engineers having jurisdiction over the permitted activity or the appropriate official acting under the authority of the commanding officer. You are authorized to perform work in accordance with the terms and conditions specified below. Project Description: The City of Carlsbad (City) is authorized to develop a program to evaluate the feasibility of using unconventional (upland and other sources) discharge materials for fill [nourishment] purposes. The program is designed to obtain surplus sand from upland construction, development, or dredging projects in the region and place it on the City's beaches for nourishment purposes. The purpose of this program is to capitalize on opportunities to obtain beach-quality sand from construction projects and other sources when it becomes available. If the sand is determined to be beach-compatible (i.e., satisfying specific criteria), the material would be placed on the beach or near-shore area, rather than disposing of it at an inland disposal site: The City is permitted to place approximately 150,000 cubic yards per year (cy/yr) of material on- or in the near-shore environment at the Encinas Beach site as shown in the attached drawings. The impact to Waters of the U.S. is 7.3 acres. Project Location: The proposed project is located at the Encinas Beach site on South Carlsbad State Beach, within the Pacific Ocean. The Encinas Beach site is located south of Terra Mar Point and Palomar Airport Road, near the mouth of Encinas Creek in the southern portion of the City of Carlsbad, San Diego County, California. Permit Conditions: General Conditions: The time limit for completing the authorized activity ends on May 21, 2017. If you find that you need more time to complete the authorized activity, submit your request for a time extension to this office for consideration at least one month before the above date is reached. You must maintain the activity authorized by this permit in good condition and in conformance with the terms and conditions of this permit. You are not relieved of this requirement if you abandon the permitted activity, although you may make a good faith transfer to a third party in compliance with General Condition 4 below. Should you wish to cease to maintain the authorized activity or should you desire to abandon it without a good faith transfer, you must obtain a modification from this permit from this office, which may require restoration of the area. If you discover any previously unknown historic or archeological remains while accomplishing the activity authorized by this permit, you must immediately notify this office of what you have found. We will initiate the Federal and state coordination required to determine if the remains warrant a recovery effort or if the site is eligible for listing in the National Register of Historic Places. If you sell the property associated with this permit, you must obtain the signature of the new owner in the space provided and forward a copy of the permit to this office to validate the transfer of this authorization. You must allow representatives from this office to inspect the authorized activity at any time deemed necessary to ensure that it is being or has been accomplished with the terms and conditions of your permit. Special Conditions 1) Discharges of fill material into waters of the U.S. authorized in this permit shall be limited to the volume and grain size distribution specified on a case-by-case basis. Non- traditional materials, such as materials derived from upland sources or materials deviating from Corps general practice (requiring beach nourishment material be at least 75% sand with no more than a 10% difference in sand content between material at the source and discharge sites), are likely to require additional, unique, site-specific testing, to be determined on a case-by-case basis, beyond traditional testing methods in order to ensure compliance with the 404(b)(1) guidelines. No discharge of fill material into a. The applicant is required to concurrently submit to the Corps and EPA and receive written approval (by letter or e-mail) from the Corps for a sampling and analysis plan (SAP) for each proposed use of this permit. The SAP will be in accordance with standard tiered testing procedures and will include testing at the source and proposed discharge site (one of the sites approved under this 2 permit). The SAP would also address sieve (grain size) analysis, as well as the potential for adverse impacts involving aesthetics and compaction directly related to characteristics of the proposed source material and the receiving beach material. b. The results of the approved SAP will be submitted to the Corps, EPA, and appropriate Regional Water Board for review and approval. If source material is to be dredged, separate authorization under Sections 10 and/or 404 will be required. Non-traditional materials (defined above) must be discharged in the surf-zone, subject to other applicable restrictions (location, timing). A detailed. pre- and post-project monitoring plan will be submitted for Corps review of the plan from the Corps. The plan shall identify monitoring protocol, reporting protocol, and contingency operations to evaluate potential changes in turbidity/sedimentation, water quality, and biology within the proposed discharge site and the adjacent offshore area. The survey would be required to identify and delineate habitat types, including eelgrass beds, high-relief reef and low-relief vegetated reefs (with indicator species including giant and feather boa kelp, large sea fans, sea palms, and surf-grass), immediately adjacent and downcoast of the proposed discharge, with potential to be impacted by the proposed discharge. In addition, pre-project monitoring shall include surveys to evaluate beach suitability for California grunion (Leuresthes tenuis) activity. In the event that beach nourishment operations would extend beyond March 15 through September 15 (the grunion spawning season), and if surveys indicate that beach conditions are found to be suitable for grunion activity or grunion activity is detected at any time, the permittee shall refrain from work and immediately notify the Corps (within 24 hours). After coordination with NOAA Fisheries, to ensure that impacts to California grunion are minimized to the greatest extent possible, then the Corps may authorize the permittee to proceed. Beach sand in the grunion spawning zone (i.e., high intertidal) should not be disturbed from March 15 to September 15 unless a survey has shown that no grunion are present. If eggs are present, no sand disturbing activities should occur for the two-week incubation period and until subsequent monitoring indicates no additional spawning has occurred." A detailed sediment budget analysis based on (1) pre-project sediment budget analysis or (2) known sediment budget data for the receiving beach from a reasonably recent study. The permittee should be able to demonstrate a net loss of sediment deposition over the project area, and thus that local beach profiles reflect these conditions and show the effects of erosion. Description of the transport and discharge operations should include, at a minimum, the following: 3 Transport and discharge procedures for all sediment, including all material unsuitable for beach nourishment discharge. A schedule showing when the beach nourishment project is planned to begin and end. A debris management plan to prevent disposal of large debris at all beach discharge locations. The debris management plan shall include: sources and expected types of debris, debris separation and retrieval methods, and debris disposal methods. The plan shall include the volume of material to be excavated and discharged. The plan shall list previous discharges by site, date, and volume, as well as the total volume of material which has been excavated and discharged to date, using this Regional General Permit. 7) Once the Corps has received the information required in Special Conditions 1 through 6 above and verified compliance with all the terms and conditions, the Corps would prepare a signed NTP as described above. Section 10 Conditions 8) The permitted activity shall not interfere with the right of the public to free navigation on all navigable waters of the United States. 9) Creosote treated pilings shall not be placed in navigable waters or waters of the United States unless all of the following conditions are met: The project involves the repair of existing structures that were originally constructed using wood products; The creosote treated pilings are entirely wrapped in plastic; The use of plastic-wrapped creosote pilings is restricted to marine waters; Measures are taken to prevent damage to plastic wrapping from boat use. Such measures may include installation of rub strips or bumpers; The plastic wrapping is sealed at all joints to prevent leakage. The plastic material is expected to maintain its integrity for at least ten years, and plastic wrappings that develop holes or leaks are repaired or replaced in a timely manner. 10) The Permittee shall discharge only clean construction materials suitable for use in the oceanic environment. The Permittee shall ensure no debris, soil, silt, sand; sawdust, rubbish, cement or concrete washings thereof, oil or petroleum products, from construction shall be allowed to enter into or placed where it may be washed by rainfall or runoff into waters of the United States. Upon completion of the project authorized herein, any and all excess material or debris shall be completely removed from the work area and disposed of in an appropriate upland site. 11) The Permittee shall provide written notification to the Corps, NOAA, FWS, and CDFG of the date of commencement of operations not less than 14 calendar days prior to commencement of the activities authorized herein and the date of completion of operations at least five calendar days prior to such completion. The notification shall include the following: Corps File Number (200601675-CLK); Name of company performing work and onsite point of contact; Size and type of equipment that shall be performing the work and; Schedule for beginning and ending the project 12) The Permittee shall notify the Commander, Eleventh Coast Guard District, and the Coast Guard, Sector San Diego not less than 14 calendar days prior to commencing work and as project information changes. The notification, either by letter, fax, or e- mail, shall include as a minimum the following information: Project description including the type of operation (i.e. dredging, diving, construction, etc). Location of operation, including Latitude / Longitude (NAD 83). Work start and completion dates and the expected duration of operations. Equipment and vessels involved in the operation (name, size and type). VHF-FM radio frequencies monitored by vessels on scene. Name of company, point of contact, and 24 hour phone number. Potential hazards to navigation. Chart number for the area of operation. Addresses: Commander, 11th Coast Guard District (dpw) Coast Guard Island, Building 50-2 Alameda, CA 94501-5100 ATrN: Local Notice to Mariners TEL: (510) 437-2970, (510) 437-2986 FAX: (510) 437-3423 Email: dlllnm@uscg.mil U.S. Coast Guard Sector San Diego 2710 N. Harbor Dr. San Diego, CA 92101 Attn: Ports and Waterways Division TEL: (619) 278-7262 FAX: (619) 278-7279 13) The Permittee and his or her contractor(s) shall not remove, relocate, obstruct, willfully damage, make fast to, or interfere with any aids to navigation defined at 33 C.F.R. chapter I, subchapter C, part 66. The Permittee shall ensure his or her contractor notifies the Eleventh Coast Guard District in writing, with a copy to the Corps, not less than 30 calendar days in advance of operating any equipment adjacent to any aids to navigation which requires relocation or removal. Should any federal aids to navigation be affected by this project, the Permittee shall submit a request, in writing, to the Corps as well as the U.S. Coast Guard, Aids to Navigation office at the Coast Guard address in 5 Alameda, CA in Condition 9, Attn: Operations Officer, LT Stephen Walters. For questions, the Aids to Navigation office can be contacted at (510) 437-2976. The Permittee and his or her contractor are prohibited from relocating or removing any aids to navigation until authorized to do so by the Corps and the U.S. Coast Guard. Should the Permittee determine the work requires the placement and use of private aids to navigation in navigable waters of the U.S., the Permittee shall submit a request in writing to the Corps as well as the U.S. Coast Guard, Aids to Navigation office at the Coast Guard address in Alameda, CA in Condition 9, Attn: Mr. Brian Aldrich. For questions regarding private aids to navigation Mr. Aldrich can be contacted at (510) 437-2983. The Permittee is prohibited from establishing private aids to navigation in navigable waters of the U.S. until authorized to do so by the Corps and the U.S. Coast Guard. Upon notification to the U.S. Coast Guard as specified in Special Condition 9, the Permittee shall forward a copy of the notification to the Coast Guard Captain of the Port (COTP). The COTP may modify the deployment of marine construction equipment or mooring systems to safeguard navigation during project construction. The Permittee shall direct questions concerning lighting, equipment placement, and mooring to the COTP at (619) 278-7262. The Permittee shall install and maintain, at his or her own expense, any safety lights and signals prescribed by the U.S. Coast Guard, through regulations or otherwise, on his or her authorized facilities. The Coast Guard may be reached at the San Diego address and telephone number from Condition 9 above. The permittee shall ensure that all vessel operators have a marine band radio, monitor Channel 16, and follow navigation rules (rules of the road) at all times. The permittee shall mark with buoys any underwater cables or anchoring systems for vessels involved with the project proposed herein. Within 45 calendar days of completion of authorized work in waters of the U.S., the Permittee shall submit to the Corps, NOAA, USFWS, and CDFG a post-project implementation memo indicating the date authorized impacts to waters of the U.S. ceased, a compliance report with labeled photographs, and a summary of all project activities which documents compliance with all permit conditions: Within 30 calendar days of completion of the project authorized by this permit, the Permittee shall conduct a post-project survey indicating changes to structures and other features in navigable waters. The Permittee shall forward a copy of the survey to the Corps and to the National Oceanic and Atmospheric Service for chart updating: Gerald E Wheaton, NOAA, Regional Manager, West Coast and Pacific Ocean, DOD Center Monterey Bay, Roóm 5082, Seaside, CA 93955-6711. The permittee understands and agrees that, if future operations by the United States require the structure or work herein authorized, or if, in the opinion of the Secretary of the Army or his authorized representative, said structure or work shall cause unreasonable obstruction to the free navigation of the navigable waters, the permittee will be required, upon due notice from the Corps of Engineers, to remove, relocate, or alter the structural work or obstructions caused thereby, without expense to the United States. No claim shall be made against the United States on account of any such removal or alteration. Endangered Species Act: This Corps permit does not authorize you to take any threatened or endangered species, in particular the California least tern (Sterna antillarum browni), the western snowy plover (Charadrius alexandrinus nivosus) and the California brown pelican (Pelecanus occidentalis cal!fornicus) or adversely modify its designated critical habitat. In order to legally take a listed species, you must have separate authorization under the Endangered Species Act (ESA) (e.g. ESA Section 10 permit, or a Biological Opinion (BO) under ESA Section 7, with "incidental take' provisions with which you must comply). Pursuant to the USFWS correspondence dated April 30, 2007, including the required avoidance and minimization measures, the Corps has determined and the [FWS] has concurred that your activity is not likely to adversely affect the above species. Your authorization under this Corps permit is conditional upon your compliance with all of the required avoidance and minimization measures, which are incorporated by reference in this permit. Failure to comply with the required avoidance and minimization measures would constitute non-compliance with your Corps permit. The [FWS] is the appropriate authority to determine compliance with the ESA. Grunion spawning season is from March 1 to August 30, therefore grunion will be monitored before construction, and if present, during construction. No post- construction monitoring is required for grunion. A qualified grunion monitor must be present to observe grunion runs two to three weeks prior to construction during a predicted grunion run (according to the grunion calendar produced by the California Department of Fish and Game), and immediately prior to construction. If grunions are present during predicted runs, beach nourishment will only occur above the spring high tide line/kelp line or in the nearshore until the spawning season is over. As an alternative, grunion monitoring could continue throughout the sand placement period, and if they do not spawn during a predicted run then sand could be placed below the spring high tide line. Sand placement quantities shall be limited to 150,000 cubic yards (cy) per year, with maximum annual volumes distributed seasonally as follows: Fall/Winter (Sept. 15 - March 15) —150,000 cy with up to 25% maximum fines content; Spring (March 15 through Memorial Day) - 40,000 cy with up to 15% maximum fines content; Summer (Memorial Day through Labor Day) - no sand placement permitted; and Late Summer (Labor Day through September 15) - 10,000 cy with up to 15% maximum fines content All beach nourishment material shall be placed directly on the beach profile at the Encinas Beach site. Sand deposited on the beach cannot contain hazardous materials, must be free of trash and debris, must reasonably match the color of natural beach sand after exposure to the 7 marine environment, must be less than 10% manufactured sand, and must not form a hardpan after placement. Between March 15 and Memorial Day, the Service recommends that beach nourishment material be placed on the beach as a beach berm or as a sand dike along the bluff toe to reduce turbidity during the least tern breeding season. If the material is to be placed below the Mean High Tide (MHT) line, then it must be controlled in volume and placement rate, such that the turbidity plume does not exceed the requirements in condition 5, below. The placement scenario will depend on volume and percent fines, and may be adjusted depending on actual field conditions (wind, waves, etc.). The extent of turbidity plumes at the beach nourishment site shall be monitored throughout the duration of sand placement activities. Turbidity monitoring shall be conducted as outlined in the monitoring plan of the Project's Final Mitigated Negative Declaration and permits issued by regulatory agencies. However, between March 15 and Memorial Day, the following conditions apply: Turbidity plumes shall not exceed I hectare at any given time. If a plume is documented to be greater than I hectare, or if the plume comes within 1.5 miles of the tern breeding colonies at Batiquitos Lagoon or Camp Pendleton, project operations must cease until the plume has receded. For the purpose of monitoring, surface turbidity is defined as a change in ambient conditions in the water column visible to the naked eye and where a secchi disc reading is less than 1 m. Turbidity plumes seen with the naked eye but that have a secchi disc reading greater than I m would not require remedial action Surface turbidity will not be considered in the surf zone, which is where the ocean waves are actively breaking on the beach. Surface turbidity shall be measured immediately west of the active wave break on the beach. It is recommended that turbidity monitoring start with visual observations from a vantage point and when the plume appears to extend either beyond the surf zone or is approaching the 1.5-mile boundary to the tern breeding colony, then secchi disk readings can be conducted to assess the condition of the turbidity plume and project operations can be adjusted, if needed. No construction lighting shall be used at night. If lighting must be used, lights must be shielded and oriented towards the ocean, away from back beaches in order to ensure no measurable increase in light level at plover nesting sites from March 1 to September 15. The City will direct a qualified biological monitor to examine the beach prior to any fill activities. If either the brown pelican, California least tern, or Western snowy plover are present, construction will be halted until the birds move away from the fill area. If nests of these birds are detected, beach nourishment will be postponed until the young have fledged. A summary report of monitoring efforts shall be submitted to the Corps of Engineers and the Service within 90 days of conclusion of the monitoring effort. The report shall include dates of monitoring, weather and winds conditions, grain size of the borrow sites, and any sightings of tern, pelican, plover, or other species of seabirds foraging in or adjacent to nourishment operations. Post-discharge special conditions: 32) If a violation of any permit condition occurs during discharge operations, the permittee shall report such violations to the Los Angeles District's Regulatory Branch within twenty-four (24) hours after the violation occurs. If the permittee retains any contractors to perform any activity authorized by this permit or to monitor compliance with this permit, the permittee shall instruct all such contractors that notice of any permit violations must be provided to the permittee immediately so the permittee can report the violation as required. 33) The permittee shall maintain a copy of this permit on all vehicles used to transport and discharge of fill material authorized under this permit. 34) The permittee shall send one (1) copy of the post-discharge report to the Los Angeles District's Regulatory Branch documenting compliance with all general and special conditions defined in this permit. The post-discharge report shall be sent within 30 days after completion of the discharge operations authorized in this permit. The report shall include: All information collected by the permittee as required by the special conditions of this permit. The report shall indicate whether all general and special permit conditions were met. Any violations of the permit shall be explained in detail. The post-discharge report shall include the following information: Corps permit number. Identify source of material. Total cubic yards disposed at each discharge site. Modes of transportation and discharge. Form of discharged material and percent sand, silt and clay in the dredged material. Actual start date and completion date of transport and discharge operations. - Monitoring results. * 35) will determine the level of impact and if additional resource monitoring is warranted. If additional monitoring is required, the Corps will notify the permittee of this requirement and the permittee shall submit a supplemental monitoring plan for Corps review and approval within 30 days of notification by the Corps and shall conduct the additional monitoring as approved. If the Corps determines no impacts, the monitoring program may be terminated at that time. If additional monitoring is required, the conditions of the original monitoring plan remain in effect until the supplemental plan is completed. 36) This permit does not authorize significant impacts to aquatic resources. Based on pre- and post-project monitoring results, the Corps will determine if impacts to aquatic resources have occurred and if mitigation is required. Any required mitigation would be the responsibility of the applicant and failure to implement Corps-specified mitigation could result in enforcement proceedings. The applicant will implement all standard BMPs. The applicant will establish a safety flag perimeter of the beach nourishment area during disposal activities, and monitor the premises to protect the general public from construction hazards and equipment. No maintenance, storage, or fueling of heavy tracked equipment or vehicles will occur within 500 feet of the high tide line of waters of the U.S. Permittee shall insure that no material from the existing ground surface to 7 below the ground surface for all excavated areas as shown in Figure 1 - Site Plan Proposed Source Area shall be used for beach nourishment. All material placed on the beach shall be slurried/pumped or otherwise placed in the surf zone so that no excavated material comes in contact with the dry beach. Permittee shall monitor the beach for two weeks after discharge to insure that no fine material accretes on the beach and shall notify the Corps immediately if any fine material accretes on the beach. Permittee shall implement and abide by the Coastal Development Permit 6-06-048 as prepared by the California Coastal Commission on October 11, 2006. Permittee shall implement and abide by the Section 401 water quality certification dated March 23, 2007 as prepared by the San Diego Regional Water Quality Control Board. Further Information: Congressional Authorities. You have been authorized to undertake the activity described above pursuant to: ()Section 10 of the River and Harbor Act of 1899 (33 U.S.C. 403). (X) Section 404 of the Clean Water Act (33 U.S.C. 1344). ()Section 103 of the Marine Protection, Research and Sanctuaries Act of 1972 (33 U.S.C. 1413). Lin-tits of this authorization. - This permit does not obviate the need to obtain other Federal, state, or local authorizations required by law. This permit does not grant any property rights or exclusive privileges. This permit does not authorize any injury to the property or rights of others. This permit does not authorize interference with any existing or proposed Federal project. 10 3. Limits of Federal Liability. In issuing this permit, the Federal Government does not assume any liability for the following: Damages to the permitted project or uses thereof as a result of other permitted or unpermitted activities or from natural causes. Damages to the permitted project or uses thereof as a result of current or future activities undertaken by or on behalf of the United States in the public interest. Damages to persons, property, or to other permitted or unpermitted activities or structures caused by the activity authorized by this permit. Design or construction deficiencies associated with the permitted work. Damage claims associated with any future modification, suspension, or revocation of this permit. 4. Reliance on Applicant's Data. The determination of this office that issuance of this permit is not contrary to the public interest was made in reliance on the information you provided. 5. Reevaluation of Permit Decision. This office may reevaluate its decision on this permit at any time the circumstances warrant. Circumstances that could require a reevaluation include, but are not limited to, the following: You fail to comply with the terms and conditions of this permit. The information provided by you in support of your permit application proves to have been false, incomplete, or inaccurate (See 4 above). Significant new information surfaces which this office did not consider in reaching the original public interest decision. Such a reevaluation may result in a determination that it is appropriate to use the suspension, modification, and revocation procedures contained in 33 CFR 325.7 or enforcement procedures such as those contained in 33 CFR 326.4 and 326.5. The referenced enforcement procedures provide for the issuance of an administrative order requiring you to comply with the terms and conditions of your permit and for the initiation of legal action where appropriate. You will be required to pay for any corrective measure ordered by this office, and if you fail to comply with such directive, this office may in certain situations (such as those specified in 33 CFR 209.170) accomplish the corrective measures by contract or otherwise and bill you for the cost. 6. Extensions. General condition 1 establishes a time limit for the completion of the activity authorized by this permit. Unless there are circumstances requiring either a prompt completion of the authorized activity or a reevaluation of the public interest decision, the Corps will normally give you favorable consideration to a request for an extension of this time limit. Your signature below, as permittee, indicates that you accept and agree to comply with the terms and conditions of this permit. 11 / elt 'f- ;rWf D7 PERMITIE17 DATE This permit becomes effective when the Federal official, designated to act for the Secretary of the Army, has signed below. Robert R. Smith DATE Senior Project Manager Regulatory Division When the structures or work authorized by this permit are still in existence at the time the property is transferred, the terms and conditions of this permit will continue to be binding on the new owner(s) of the property. To validate the transfer of this permit and the associated liabilities associated with compliance with its terms and conditions, have the transferee sign and date below. TRANSFEREE DATE 12 LOS ANGELES DISTRICT U.S. ARMY CORPS OF ENGINEERS CERTIFICATION OF COMPLIANCE WITH Permit Number. 200601161-CLK Name of Permittee: City of Carlsbad Date of Issuance: May 21, 2007 Upon completion of the activity authorized by this permit, sign this certification and return it to the following address: Regulatory Branch - Los Angeles District Office ATTN: CESPL-CO-R-200601161-CLK P.O. Box 532711 Los Angeles, California 90053-2325 Please note that your permitted activity is subject to a compliance inspection by an Army Corps of Engineers representative. If you fail to comply with this permit you may be subject to permit suspension, modification, or revocation. - I hereby certify that the work authorized by the above referenced permit has been completed in accordance with the terms and conditions of said permit. Signature of Permittee Date 13 I Carlsbad Opportunistic Location Map of Opportunistic Figure L Beach Fill Program Beach Sites in Carlsbad E l Carlsbad.Opportuflistic Encinas Beach Fill Plan Figure Beach FillProgram and Profile Locations 2 20 15 10 37 1 -p0 a, a, -10 -J —15 —20 —25 00 0 100 200 300 400 500 600 700 8 900 1000 Range (Feet seaward of Range Line Monument) Prepared by Moffctt Nchd Engince,, TtOAS1AL\DWC'N—TVP.DWO -BEACH Fl .L ..•.'\ •• CB-760 I T. /rMEA. URED 10/ ____ • •••••• ••• _ _ A- i Carlsbad Opportunistic Encinas Beach Fill Figure Beach Fill Program • Typical Section 3 Carlsbad Opportunistic Beach Fill Dike Along Back of Beach I Below MHT Line Figure Beach Fill Program Encinas Beach Typical Section 4 AECOM Environment Appendix B - Sample Locations and Analytical Results, Ninyo & Moore Sediment Sampling, December 2006 60190208 January 2011 y / ' r1? • '• , OL rsI' 7 A%W TT i' it 4 I4 Adgalk $ / rIM CCAH 01 ' • - ••t '1 AGUAHEDIONDACREEK ;, /. / . øs:IMAM øc .i•. ••. 1\'* ml Dj 4 M ~ _*kNA. 2 AL - - - - --'EL-CAMUrOREAL'"- .- Liil._______ _________________________________________ - - .; ••I - • • •. :T : - Agua Hedionda Creek February 10, 2006 Carlsbad, California Project No. 105760001 Table 1- Summary of Analytical Results Agua Hedlonda City of Carlsbad, California January 2006 Calscience Environmental Laboratories, Inc. Sample Name Sample Date Metals UnI&r - mg/- EPA Method 3050B/6020 Aluminum Cadmium I-Chromium-1 Copper I Lead I Nickel I Zinc CCAH-01 15-Jan-06 1460 ND 1.36 5.35 1.03 1.56 6.50 CCAH-02 I 15-Jan-06 1 1540 ND 1 2.52 1 9.09 1 1.57 1 2.25 9.26 Sample Name Sample Date Polynuclear Aromatic Hydrocarbons (PAR) Units EPA Method 8270C CCAII-01 15-Jan-06 Naphthalene 0.091 CCAR-02 15-Jan-06 ND Sample Name Sample Date Oft & Grease Unity mg/kg EPA Method 413.2 CCAII-01 15-Jan-06 17 CCAR.02 15-Jan-06 19 ND - Parameter not detected above the laboratory reporting limit found in Appendix C. Nautilus Environmental Sediment Toxicity Evaluation of Agua Hedionda Creek Mean survival of amphipods exposed to test sediments Site NM-CCAH-01 and NM-CCAH-02 was 90 percent and 75 percent respectively. Mean survival in the control was 82 percent. The control value complies with the recommended EPA survival criterion guideline of 80 percent. Refer to Appendix A for complete results. AECOM Environment Appendix C - Example Receiver Site Sediment Sampling Profile Showing Appropriate Sampling Locations 60190208 January 2011 I I uJ re - re Figure 3. Example Receiver Site Sediment Sampling Profile Showing Appropriate Sampling Locations 11-5 Moffatt & Nichol