Table 1 Ken Malloy Harbor Regional Park - Previous Sampling Results

TABLES

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-01-0-3 FWM-03-2.5 FWM-04-2.5 FWM-05-2.5 Parameters CHHSL RSL 0-3 2.5 2.5 2.5 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+03 7.20E+03 2 U -- -- -- 2,4'-DDE NE NE NE 6.30E+03 5.10E+03 2 U -- -- -- 2,4'-DDT NE NE NE 6.30E+03 7.00E+03 2 U -- -- -- 4,4'-DDD 100 1000 1000 9.00E+03 7.20E+03 2U 3.4U 2.6U 3.1U 4,4'-DDE 100 1000 1000 9.00E+03 5.10E+03 2U 3.4U 2.6U 3.1U 4,4'-DDT 100 1000 1000 6.30E+03 7.00E+03 2 U 3.4 J 0.88 J 0.88 J Total DDT's 6.30E+03 7.00E+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 2,500 1.70E+03 6.50E+03 15 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+02 1.10E+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 16.62 220 6.4 41 Dissolved Orthophosphate as P by IC NE NE NE NE NE 0.76 11 27 44 Nitrate-N by IC NE NE NE NE 1.60E+06 1.53 3.4 U 0.56 1.5 Nitrite-N by IC NE NE NE NE 1.00E+05 0.51 3.4 U 1.3 U 7.8 U Percent Lipids NE NE NE NE NE -- Percent Solids NE NE NE NE NE 72.6 58.13 77.02 63.78 Total Kjeldahl Nitrogen NE NE NE NE NE 569.15 -- -- -- Total Nitrogen NE NE NE NE NE 653.8 -- -- -- Total Organic Carbon (Percent) NE NE NE NE NE -- 12 0.17 0.71 Total Phosphorus-High Range NE NE NE NE NE 1120.775 6200 4800 6000 Total Sulfides NE NE NE NE NE 0.9 Oil and Grease (Percent) NE NE NE NE NE -- 0.033 0.0065 U 0.0078 U TRPH/TPH (Percent) NE NE NE NE NE -- 0.021 0.0065 U 0.0078 U PCB Aroclors (EPA 8270Cm) (µg/kg) (µg/l) (µg/kg) Aroclor 1232 5.40E+02 20 U 28 21 U 26 U Aroclor 1242 NE NE NE NE 7.40E+02 20 U 28 21 U 26 U Aroclor 1248 NE NE NE NE 7.40E+02 20 U 28 21 U 26 U Aroclor 1254 NE NE NE NE 7.40E+02 240 J 28 21 U 26 U Aroclor 1260 NE NE NE NE 7.40E+02 20 U 13 J 21 U 26 U Total PCBs 5,000 50,000 50,000 3.00E+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+06 100 U PAHs (µg/kg) Acenaphthene NE NE NE NE 3.30E+07 22.2 -- -- -- Anthracene NE NE NE NE 1.70E+08 15.7 -- -- -- Benz[a]anthracene NE NE NE NE 2.10E+03 105.4 -- -- -- Benzo[a]pyrene NE NE NE 1.30E+02 2.10E+02 50.6 -- -- -- Benzo[b]fluoranthene NE NE NE NE 2.10E+03 61.5 -- -- -- Benzo[k]fluoranthene NE NE NE NE 2.10E+04 23.6 -- -- -- Chrysene NE NE NE NE 2.10E+05 223.7 -- -- -- Dibenz[a,h]anthracene NE NE NE NE 2.10E+02 15 -- -- -- Fluoranthene NE NE NE NE 2.20E+07 118 -- -- -- Fluorene NE NE NE NE 2.20E+07 13.1 -- -- -- Indeno[1,2,3-cd]pyrene NE NE NE NE 2.10E+03 36.6 -- -- -- Methylnaphthalene, 1- NE NE NE NE 9.90E+04 59.1 -- -- -- Methylnaphthalene, 2- NE NE NE NE 4.10E+06 4.7 J -- -- -- Naphthalene NE NE NE NE 1.80E+04 5.6 -- -- -- Pyrene NE NE NE NE 1.70E+07 151.5 -- -- -- Total PAHs NE NE NE NE NE 1123.2 Metals (EPA 6020m) (mg/kg) (mg/l) (mg/kg) Aluminum (Al) NE NE NE NE 9.90E+05 10810 7800 13000 22000 Antimony (Sb) NE NE NE 3.80E+02 4.10E+02 84.03 0.43 U 0.32 UJ 0.39 UJ Arsenic (As) 5 50 500 2.40E-01 1.60E+00 24.78 5.5 2.9 4.9 Barium (Ba) 100 1,000 10,000 6.30E+04 1.90E+05 869.5 420 180 430 Beryllium (Be) NE NE NE 1.70E+03 2.00E+03 0.463 0.49 J 0.7 J 0.93 J Cadmium (Cd) 1 10 100 7.50E+00 NE 11.59 2.4 0.21 J 1.5 Total Chromium (Cr) 5 50 2,500 NE NE 158.5 28 15 32 Hexavalent Chromium NE NE NE 3.70E+01 5.60E+00 -- 1.4UJ 0.26UJ 1.3UJ Cobalt (Co) 80 800 8,000 3.20E+03 3.00E+02 38.46 10 8.3 12 Copper (Cu) 25 250 2,500 3.80E+04 4.10E+04 1498 71 23 45 Iron (Fe) NE NE NE NE 7.20E+05 69340 15000 13000 21000 Lead (Pb) 5 50 1,000 3.20E+02 8.00E+02 1894 91 7.6 7 Magnesium (Mg) NE NE NE NE NE 7685.6 -- -- -- Manganese (Mn) NE NE NE NE 2.3E+04 660.4 340 270 570 Mercury (Hg) 0.2 2 20 1.80E+02 4.3E+01 0.34 0.36 0.063 J 0.16 U Molybdenum (Mo) 350 3,500 3,500 4.80E+03 5.10E+03 143 3.1 0.14 J 0.54 J Nickel (Ni) 20 200 2,000 1.60E+04 4.40E+04 801.2 40 15 42 Selenium (Se) 1 10 100 4.80E+03 5.10E+03 1.117 0.43 U 0.32 UJ 0.39 UJ Silver (Ag) 5 50 500 4.80E+03 5.10E+03 0.254 0.67 0.079 J 0.24 J Strontium (Sr) NE NE NE NE 6.10E+05 198.7 -- -- -- Thallium (Tl) NE NE NE 6.30E+01 1.00E+01 0.117 0.19 J 0.13 J 0.21 J Page 1 of 2

Table 2 Sampling Locations and Rationale for Proposed Sampling Program Location Latitude Longitude Sample Description of Sample Rationale ID (North) (West) Media Location FWM12-1 33.7821640 118.2930366 Soil Northeast corner of the Site Lateral Delineation of Former Disposal Site FWM12-2 33.7820375 118.2931861 Soil Central portion of the Site Lateral Delineation of Former Disposal Site FWM12-3 33.7819095 118.2929249 Soil East extent of the Site Lateral Delineation of Former Disposal Site FWM12-4 33.7818479 118.2930847 Soil Central portion of the Site Lateral Delineation of Former Disposal Site FWM12-5 33.7816543 118.2930385 Soil East extent of the Site Lateral Delineation of Former Disposal Site FWM12-6 33.7815889 118.2931785 Soil Central portion of the Site Lateral Delineation of Former Disposal Site FWM12-7 33.7813829 118.2930758 Soil East extent of the Site Lateral Delineation of Former Disposal Site FWM12-8 33.7812985 118.2932594 Soil Central portion of the Site Lateral Delineation of Former Disposal Site FWM12-9 33.7811224 118.2931776 Soil Southeast corner of the Site Lateral Delineation of Former Disposal Site FWM12-10 33.7811220 118.2933421 Soil South extent of the Site Lateral Delineation of Former Disposal Site FWM12-11 33.7812237 118.2934518 Soil Southwest corner of the Site Lateral Delineation of Former Disposal Site FWM12-12 33.7813562 118.2934891 Soil West extent of the Site Lateral Delineation of Former Disposal Site FWM12-13 33.7814906 118.2934548 Soil West extent of the Site Lateral Delineation of Former Disposal Site FWM12-14 33.7816046 118.2933599 Soil Central portion of the Site Lateral Delineation of Former Disposal Site FWM12-15 33.7817619 118.2934394 Soil West extent of the Site Lateral Delineation of Former Disposal Site FWM12-16 33.7818993 118.2934353 Soil West extent of the Site Lateral Delineation of Former Disposal Site FWM12-17 33.7820316 118.2934795 Soil West extent of the Site Lateral Delineation of Former Disposal Site FWM12-18 33.7820820 118.2933604 Soil Central portion of the Site Lateral Delineation of Former Disposal Site FWM12-19 33.7821837 118.2933648 Soil North extent of the Site Lateral Delineation of Former Disposal Site FWM12-20 33.7821718 118.2932009 Soil North extent of the Site Lateral Delineation of Former Disposal Site FWM12-21 33.7817082 118.2932682 Soil Central portion of the Site Vertical Delineation of Former Disposal Site FWM12-22 33.7814401 118.2932673 Soil Central portion of the Site Vertical Delineation of Former Disposal Site BKG-1 33.7817611 118.2939444 Soil Off-Site Assess background metals concentrations BKG-2 33.7820111 118.2926444 Soil Off-Site Assess background metals concentrations BKG-3 33.7818797 118.2921234 Soil Off-Site Assess background metals concentrations BKG-4 33.7824333 118.2908571 Soil Off-Site Assess background metals concentrations BKG-5 33.7820776 118.2891564 Soil Off-Site Assess background metals concentrations PARSONS Page 1 of 1 RI WORKPLAN KMHRP FORMER DISPOSAL SITE

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 1 0.5 Title 22 Metals, SVOCs BKG-2 Soil 1 0.5 Title 22 Metals, SVOCs BKG-3 Soil 1 0.5 Title 22 Metals, SVOCs BKG-4 Soil 1 0.5 Title 22 Metals, SVOCs BKG-5 Soil 1 0.5 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

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 412014900, Lot PT H. The exposure unit used in the risk assessment will encompass Assessor s Parcel Number 412014900, 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

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 SW8270 3-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