Table 1 Ken Malloy Harbor Regional Park - Previous Sampling Results

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3 Table 1 Ken Malloy Harbor Regional Park - Previous Sampling Results Soluble Threshold Total Threshold Sample Location, I.D., and Sample Depth (ft bgs) Limit Concentration Limit Concentration FWM-01 FWM-03 FWM-04 FWM-05 FWM FWM FWM FWM Parameters CHHSL RSL Units (a) STLC (a) 10x STLC TTLC (b) Soil (c) Soil (d) Soil Soil Soil Soil Chlorinated Pesticides (EPA 8270Cm) (µg/kg) (µg/l) (µg/kg) 2,4'-DDD NE NE NE 9.00E E+03 2 U ,4'-DDE NE NE NE 6.30E E+03 2 U ,4'-DDT NE NE NE 6.30E E+03 2 U ,4'-DDD E E+03 2U 3.4U 2.6U 3.1U 4,4'-DDE E E+03 2U 3.4U 2.6U 3.1U 4,4'-DDT E E+03 2 U 3.4 J 0.88 J 0.88 J Total DDT's 6.30E E+03 2 U 3.4 J 0.88 J 0.88 J BHC-alpha 2U 1.7U 1.3U 1.6U BHC-beta 2U 1.7U 1.3U 1.6U BHC-delta 2U 1.7U 1.3U 1.6U BHC-gamma 2U 1.7U 1.3U 1.6U Chlordane 250 2,500 2, E E U 11 U 13 U Chlordane-alpha 250 2,500 2,500 NE NE 2U 1.7U 1.3U 1.6U Chlordane-gamma 250 2,500 2,500 NE NE 2U 1.7U 1.3U 1.6U cis-nonachlor NE NE NE NE NE 2 U Dieldrin NE NE NE 1.30E E+02 5U 3.4U 2.6U 3.1U trans-nonachlor NE NE NE 2 U General Chemistry (Various Methods) (mg/kg) Ammonia-N NE NE NE NE NE Dissolved Orthophosphate as P by IC NE NE NE NE NE Nitrate-N by IC NE NE NE NE 1.60E U Nitrite-N by IC NE NE NE NE 1.00E U 1.3 U 7.8 U Percent Lipids NE NE NE NE NE -- Percent Solids NE NE NE NE NE Total Kjeldahl Nitrogen NE NE NE NE NE Total Nitrogen NE NE NE NE NE Total Organic Carbon (Percent) NE NE NE NE NE Total Phosphorus-High Range NE NE NE NE NE Total Sulfides NE NE NE NE NE 0.9 Oil and Grease (Percent) NE NE NE NE NE U U TRPH/TPH (Percent) NE NE NE NE NE U U PCB Aroclors (EPA 8270Cm) (µg/kg) (µg/l) (µg/kg) Aroclor E U U 26 U Aroclor 1242 NE NE NE NE 7.40E U U 26 U Aroclor 1248 NE NE NE NE 7.40E U U 26 U Aroclor 1254 NE NE NE NE 7.40E J U 26 U Aroclor 1260 NE NE NE NE 7.40E U 13 J 21 U 26 U Total PCBs 5,000 50,000 50, E+02 NE 240 J 13 J 43 U 52 U Acid Extractable Compounds (EPA 8270Cm) (µg/kg) 2,4-Dichlorophenol NE NE NE NE 1.80E U PAHs (µg/kg) Acenaphthene NE NE NE NE 3.30E Anthracene NE NE NE NE 1.70E Benz[a]anthracene NE NE NE NE 2.10E Benzo[a]pyrene NE NE NE 1.30E E Benzo[b]fluoranthene NE NE NE NE 2.10E Benzo[k]fluoranthene NE NE NE NE 2.10E Chrysene NE NE NE NE 2.10E Dibenz[a,h]anthracene NE NE NE NE 2.10E Fluoranthene NE NE NE NE 2.20E Fluorene NE NE NE NE 2.20E Indeno[1,2,3-cd]pyrene NE NE NE NE 2.10E Methylnaphthalene, 1- NE NE NE NE 9.90E Methylnaphthalene, 2- NE NE NE NE 4.10E J Naphthalene NE NE NE NE 1.80E Pyrene NE NE NE NE 1.70E Total PAHs NE NE NE NE NE Metals (EPA 6020m) (mg/kg) (mg/l) (mg/kg) Aluminum (Al) NE NE NE NE 9.90E Antimony (Sb) NE NE NE 3.80E E U 0.32 UJ 0.39 UJ Arsenic (As) E E Barium (Ba) 100 1,000 10, E E Beryllium (Be) NE NE NE 1.70E E J 0.7 J 0.93 J Cadmium (Cd) E+00 NE J 1.5 Total Chromium (Cr) ,500 NE NE Hexavalent Chromium NE NE NE 3.70E E UJ 0.26UJ 1.3UJ Cobalt (Co) , E E Copper (Cu) , E E Iron (Fe) NE NE NE NE 7.20E Lead (Pb) , E E Magnesium (Mg) NE NE NE NE NE Manganese (Mn) NE NE NE NE 2.3E Mercury (Hg) E E J 0.16 U Molybdenum (Mo) 350 3,500 3, E E J 0.54 J Nickel (Ni) , E E Selenium (Se) E E U 0.32 UJ 0.39 UJ Silver (Ag) E E J 0.24 J Strontium (Sr) NE NE NE NE 6.10E Thallium (Tl) NE NE NE 6.30E E J 0.13 J 0.21 J Page 1 of 2

4 Table 1 Ken Malloy Harbor Regional Park - Previous Sampling Results Soluble Threshold Total Threshold Sample Location, I.D., and Sample Depth (ft bgs) Limit Concentration Limit Concentration FWM-01 FWM-03 FWM-04 FWM-05 FWM FWM FWM FWM Parameters CHHSL RSL Units (a) STLC (a) 10x STLC TTLC (b) Soil (c) Soil (d) Soil Soil Soil Soil Tin (Sn) NE NE NE NE 6.10E Titanium (Ti) NE NE NE NE NE Vanadium (V) , E E Zinc (Zn) 250 2,500 5, E E Notes: Blue values exceed RSL. Green values exceed CHHSL. Red values exceed CHHSL and RSL. Bold boxed exceedances fall within background concentrations. Shaded values exceed 10x STLC and/or TTLC values. Samples for which 10X STLC or TTLC criteria were exceeded were analyzed for WET ot TCLP tests as appropriate. See Table 10 for WET and TCLP test results. a) STLC = soluble threshold limit concentration for disposal of hazardous waste per California Code of Regulations. b) TTLC = total threshold limit concentration for disposal of hazardous waste California Code of Regulations. c) CHHSL California Human Health Screening Levels for Soil Commercial Use Only d) RSL - EPA Region 9 Screening Levels for Industrial Soil only Page 2 of 2

5 Table 2 Sampling Locations and Rationale for Proposed Sampling Program Location Latitude Longitude Sample Description of Sample Rationale ID (North) (West) Media Location FWM Soil Northeast corner of the Site Lateral Delineation of Former Disposal Site FWM Soil Central portion of the Site Lateral Delineation of Former Disposal Site FWM Soil East extent of the Site Lateral Delineation of Former Disposal Site FWM Soil Central portion of the Site Lateral Delineation of Former Disposal Site FWM Soil East extent of the Site Lateral Delineation of Former Disposal Site FWM Soil Central portion of the Site Lateral Delineation of Former Disposal Site FWM Soil East extent of the Site Lateral Delineation of Former Disposal Site FWM Soil Central portion of the Site Lateral Delineation of Former Disposal Site FWM Soil Southeast corner of the Site Lateral Delineation of Former Disposal Site FWM Soil South extent of the Site Lateral Delineation of Former Disposal Site FWM Soil Southwest corner of the Site Lateral Delineation of Former Disposal Site FWM Soil West extent of the Site Lateral Delineation of Former Disposal Site FWM Soil West extent of the Site Lateral Delineation of Former Disposal Site FWM Soil Central portion of the Site Lateral Delineation of Former Disposal Site FWM Soil West extent of the Site Lateral Delineation of Former Disposal Site FWM Soil West extent of the Site Lateral Delineation of Former Disposal Site FWM Soil West extent of the Site Lateral Delineation of Former Disposal Site FWM Soil Central portion of the Site Lateral Delineation of Former Disposal Site FWM Soil North extent of the Site Lateral Delineation of Former Disposal Site FWM Soil North extent of the Site Lateral Delineation of Former Disposal Site FWM Soil Central portion of the Site Vertical Delineation of Former Disposal Site FWM Soil Central portion of the Site Vertical Delineation of Former Disposal Site BKG Soil Off-Site Assess background metals concentrations BKG Soil Off-Site Assess background metals concentrations BKG Soil Off-Site Assess background metals concentrations BKG Soil Off-Site Assess background metals concentrations BKG Soil Off-Site Assess background metals concentrations PARSONS Page 1 of 1 RI WORKPLAN KMHRP FORMER DISPOSAL SITE

6 Boring ID Sample Media Number of Samples 1,2 Table 3 Sampling Locations, Depths, and Analyses Sampling Depths (ft) Laboratory Analyses FWM12-1 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-2 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-3 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-4 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-5 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-6 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-7 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-8 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-9 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-10 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-11 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-12 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-13 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-14 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-15 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-16 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-17 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-18 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-19 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-20 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-21 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry FWM12-22 Soil 5 0.5, 1, 3, 5, 10, and 15 TOC, SVOCs, PCBs, Title 22 Metals, Pesticides, General Chemistry BKG-1 Soil Title 22 Metals, SVOCs BKG-2 Soil Title 22 Metals, SVOCs BKG-3 Soil Title 22 Metals, SVOCs BKG-4 Soil Title 22 Metals, SVOCs BKG-5 Soil Title 22 Metals, SVOCs 1 Sampling will be conducted using hand augers and direct push drilling technologies. Hand auger samples will be placed in laboratory supplied glass jars. Additional samples will be selected at intervals where visual signs of lampblack or other contamination are observed. 2 Duplicate samples not included (10%) PARSONS Page 1 of 1 RI WORKPLAN KMHRP FORMER DISPOSAL SITE

7 Table 4 Application of the DQO Process to the KMHRP Former Disposal Site STATE THE PROBLEM IDENTIFY THE DECISION IDENTIFY INPUTS TO THE DECISION DEFINE STUDY BOUNDARIES DEVELOP A DECISION RULE SPECIFY LIMITS ON DECISION ERRORS OPTIMIZE THE DESIGN Vertical and lateral limits of contamination including Pesticides, Metals, PCBs, and PAHs in site soils have not been defined. Determine whether adequate data of sufficient quality are available to define the nature and extent of contamination and development of remedial alternatives. If so, then no further investigation is necessary. Determine whether site contamination poses an unacceptable risk to human health and requires further consideration or a response action, or that no further action is necessary. Data collected during the RI sampling event will be used to define extent of impacts and to estimate exposure point concentrations for the risk assessment. Action level to trigger the need for further consideration or response (based on sitespecific exposure assumptions for an unrestricted use, a cumulative 10-6 excess carcinogenic risk, and an endpoint-specific chronic hazard index of 1.0 or less). Background levels for metals and PAHs. Vertical distribution of contaminants; physical characterization of the subsurface; results of contaminant fate and transport analyses. Surface and subsurface soils at the site. Boundaries of the current Site including Assessor s Parcel Number , Lot PT H. The exposure unit used in the risk assessment will encompass Assessor s Parcel Number , Lot PT H. Future land use is assumed to be unrestricted. Does the mean concentration of COPCs represent a potential threat to human health under a future unrestricted land use? If the distribution of an individual metal at the site is statistically greater than background, then the metal will be retained as a COPC for use in the risk assessment. Adequate data will be collected to allow for the calculation of statistically defensible exposure point concentrations and comparisons to background levels of metals and PAHs. All data will meet the precision and accuracy requirements documented in the QAPP. A systematic soil sampling strategy will be used to define contaminant extent in areas likely to have been impacted by former MGP operations. Soil sampling will be limited to the upper 15 ft bgs. Visual observations during the investigation will be used to optimize soil sampling depths in the field. PID observations will be conducted during the investigation to optimize soil sampling depths in the field. Groundwater has historically been encountered at depths as high as 10 feet bgs. PARSONS Page 1 of 1 RI WORKPLAN KMHRP FORMER DISPOSAL SITE

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9 Name Table 5 Requirements for Containers, Preservation Techniques, Sample Volumes, and Holding Times Analytical Methods Sample Media Container a/ Preservation b/ Minimum Sample Volume or Weight Maximum Holding Time Title 22 Metals SW6010B Soil Acetate or GJ 4 o C 6-inch sleeve or 4-ounces 180 days Mercury SW7471B Soil Acetate or GJ 4 o C 6-inch sleeve or 4-ounces 28 days PCBs SW8082 Soil Acetate or GJ 4 o C 6-inch sleeve or 4-ounces Chlorinated Pesticides SW8081 Soil Acetate or GJ 4 o C 6-inch sleeve or 4-ounces SVOCs Soil Acetate or GJ 4 o C 6-inch sleeve or 4-ounces SW Encore Samplers per Encore or Volatile Organic Compounds SW8260C/5035 Soil 4 o C Sample or 1 TerraCore TerraCore Kit per Sample a/ Glass jar (GJ); Acetate is the sleeve that is generated during direct push drilling. Acetate sleeves are capped with Teflon sheet and end caps. b/ No ph adjustment for soil. 14 days until extraction and 40 days after extraction 14 days until extraction and 40 days after extraction 14 days until extraction and 40 days after extraction 48-hours for extraction; 14 days after extraction PARSONS Page 1 of 1 RI WORKPLAN KMHRP FORMER DISPOSAL SITE

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