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PEA Work Plan
<br /> OMM
<br /> Martin Metals Finishing Inc. (Former)
<br /> E N G I N E E R I N G Stockton, California
<br /> Table 1. Historical Analytical Results, 1984 to 1989
<br /> Analytes Analytes
<br /> Waste Extraction Testing
<br /> Sample Ag As Ba Be Cd Co Cr(total) Cr(III) Cr(VI) Cu Mo Ni Pb Sb Se V TI Zn pH
<br /> Sample Name Sample Date Sample Matrix Location Description Depth Cr(total) Cr(VI) Pb Zn
<br /> in-b s
<br /> Units: mg/kg mg/L SU
<br /> SOLID SAMPLES
<br /> 8BA1202-3 12/2/1988 Solid Red paint chip from near old SD outfall NR -- -- -- -- -- -- 1,830 -- -- 45 -- -- 12,200 -- -- -- -- 246 -- -- -- -- 5.5
<br /> 8BA1202-6 12/2/1988 Solid SD NR -- -- -- -- -- -- 63.1 -- -- 47.4 -- -- 197 -- -- -- -- 276 -- -- -- -- 8.8
<br /> 9BA0222-03 2/22/1989 Solid Filter cake from 55-gal drum in HW storage NR -- -- -- -- -- -- 13,800 -- -- 29.5 -- -- 12.5 -- -- -- -- 12,600 -- -- -- -- 8.38
<br /> LIQUID SAMPLES2
<br /> 7LD730-02 7/30/1987 Water Drippings from extrusions NR 0.48 8.7 59 < 0.02 2.58 8.85 24,600 -- -- 52.7 22.9 50.7 2,000 453 1.3 1.41 176 5,360 -- < 0.10 -- --
<br /> 8BA1202-2 12/2/1988 Water Standing water at old SD outfall NR -- -- -- -- -- -- < 0.02 -- -- < 0.013 -- -- < 0.05 -- -- -- -- 0.44 -- -- -- -- 7.76
<br /> 9BA0222-01 2/22/1989 Water Water on W side of loading bay NR -- -- -- -- -- -- 2.7 -- -- < 0.01 -- -- < 0.03 -- -- -- -- < 0.04 -- -- -- -- 7.5
<br /> 9BA0222-02 2/22/1989 Water Water on E side of loading bay NR -- -- -- -- -- -- 11 -- -- < 0.01 -- -- < 0.03 -- -- -- -- < 0.04 -- -- -- -- 7.01
<br /> 9BA0222-04 2/22/1989 Water Water from SD trench N of MMF NR -- -- -- -- -- -- 45 -- -- < 0.01 -- -- < 0.03 -- -- -- -- 50.5 -- -- -- -- 8.05
<br /> 9BA0222-04-DUP 2/22/1989 Water Water from SD trench N of MMF NR -- -- -- -- -- -- 44.5 -- -- < 0.01 -- -- < 0.03 -- -- -- -- 61 -- -- -- -- 8.02
<br /> 9BA0222-06 2/22/1989 Liquid Liquid on floor 4-5' E of SD, N side of MMF NR -- -- -- -- -- -- 98 -- -- < 0.01 -- -- < 0.03 -- -- -- -- 79 -- 0.0465 -- -- 6.13
<br /> ONSITE PROCESS-RELATED SLUDGE SAMPLES
<br /> 7LD7300-01 7/30/1987 Sludge Sludge from chromic acid tank NR 0.4 75.7 66.5 < 0.02 1.39 3.8 33,900 -- -- 90.8 2.6 9.07 23.2 766 7.12 0.1 237 2,160 -- 0.148 -- -- --
<br /> 7LD730-03 7/30/1987 Sludge Sludge beneath chromic acid tank NR 0.31 3.85 0.41 < 0.02 0.27 0.25 182 -- -- 0.78 < 0.19 0.59 0.4 8.07 7.12 < 0.1 3.7 103 -- 0.1244 -- -- --
<br /> SD SLUDGE SAMPLES
<br /> LW3078001 11/2/1988 Sludge Trench at MMF discharge NR -- < 5 -- -- 8.9 -- 4,440 -- -- 104 -- 83 397 -- -- -- -- 2,650 -- < 0.1 0.00369 0.079 8.3
<br /> LW3078002 11/2/1988 Sludge Parking lot SD trench NR -- < 5 -- -- 3.1 -- 1,920 -- -- 65 -- 41 191 -- -- -- -- 758 0.143 < 0.1 0.0105 -- 8.5
<br /> 8BA1202-5 12/2/1988 Sludge Scrapings from SD outside MMF NR -- -- -- -- -- -- 3,040 -- -- 38.5 -- -- 641 -- -- -- -- 889 -- -- -- -- 8.44
<br /> 9BA0222-05 2/22/1989 Sludge SD trench on N side of MMF building NR -- -- -- -- -- -- 3,500 -- -- 11 -- -- 29 -- -- -- -- 1,110 -- -- -- -- 7.85
<br /> 9BA0222-07 2/22/1989 Sludge SD trench on S side of MMF building NR -- -- -- -- -- -- 74 -- -- 103 -- -- 369 -- -- -- -- 323 -- -- -- -- 9.18
<br /> Maximum Concentration Detected in SD (n=6) -- < 5 -- -- 8.9 -- 4,440 -- -- 104 -- 83 641 -- -- -- -- 2,650 0.143 < 0.1 0.0105 0.079 9.18
<br /> MORMON SLOUGH SAMPLES
<br /> Sample 1 7/25/1984 Sediment 5' N of SD outfall 3 to 9 -- -- -- -- -- -- 22.2 20.5 1.7 -- -- -- -- -- -- -- -- -- -- -- -- -- --
<br /> Sample 2 7/25/1984 Sediment 22' N of SD outfall 2 to 8 -- -- -- -- -- -- 42.6 39.8 2.8 -- -- -- -- -- -- -- -- -- -- -- -- -- --
<br /> Sample 3 7/25/1984 Sediment 5' N of SD outfall 22 to 39 -- -- -- -- -- -- 32.5 32.5 0.2 -- -- -- -- -- -- -- -- -- -- -- -- -- --
<br /> LW3078003 11/2/1988 Sludge/Dirt Mormon Slough NR -- 5.3 -- -- 2.9 -- 1,420 -- -- 41 -- 35 765 -- -- -- -- 620 0.123 < 0.1 0.0337 -- 7.4
<br /> 8BA1202-1 12/2/1988 Soil Beneath new SD outfall 0 to 6 -- -- -- -- -- -- 147 -- -- 855 -- -- 344 -- -- -- -- 1,170 -- -- -- -- 6.39
<br /> 8BA1202-4 12/2/1988 Soil Beneath old SD outfall 0 to 6 -- -- -- -- -- -- 1,405 -- -- 66 -- -- 545 -- -- -- -- 883 -- -- -- -- 7.06
<br /> 8BA1207-01 12/7/1988 Sludge Mormon Slough, between outfalls NR -- -- -- -- -- -- 1,190 -- -- 30.6 -- -- 240 -- -- -- -- 615 -- -- -- -- 7.88
<br /> 8BA1207-02 12/7/1988 Sludge Mormon Slough, E of old outfall NR -- -- -- -- -- -- 3,380 -- -- 33.7 -- -- 309 -- -- -- -- 1,260 -- -- -- -- 7.65
<br /> 8BA1207-03 12/7/1988 Sludge Mormon Slough, W of new outfall NR -- -- -- -- -- -- 296 -- -- 25.1 -- -- 260 -- -- -- -- 156 -- -- -- -- 7.94
<br /> 8BA1207-04 12/7/1988 Sludge Background, Mormon Slough, E of MMF NR -- -- -- -- -- -- 48.4 -- -- 27.6 -- -- 233 -- -- -- -- 108 -- -- -- -- 6.44
<br /> Maximum Concentration Detected in Mormon Slough (n=11) -- 5.3 -- -- 2.9 -- 3,380 39.8 2.8 855 -- 35 765 -- -- -- -- 1,260 0.123 -- 0.0337 -- 7.94
<br /> Screening Criteria -Sludge and Soil Only
<br /> DTSC Commercial/Industrial Soil SLs3 (mg/kg) -- 0.36 -- 230 780 -- -- -- 6.2 -- -- 11,000 320 -- -- -- -- -- -- -- -- -- --
<br /> USEPA Industrial Soil RSLs4 (mg/kg) 5,800 220,000 -- -- 350 -- 1,800,000 -- 47,000 5,800 -- -- 470 5,800 5,800 12 350,000 -- -- -- -- --
<br /> TTLC5 (mg/kg) 700 500 10,000 75 100 8,000 2,500 -- 500 2,500 3,500 2,000 1,000 -- 100 2,400 700 5,000 -- -- -- -- --
<br /> Title 22 STLC6 m /L -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 5 5 5 250 --
<br /> Notes
<br /> Bold value indicate result exceeds Commercial/Industrial DTSC SL or USEPA RSL.
<br /> Shaded value indicates result exceeds California hazardous waste criteria.
<br /> 1. Sample depth shown is approximate.
<br /> 2. Liquid samples not compared to screening criteria for tap water or groundwater because drinking water and groundwater pathways are incomplete for the Site.
<br /> 3. DTSC HHRA HERO Note 3, June 2020. Table 1, DTSC-recommended Screening Levels (SLs)for Commercial/Industrial Soil Analytes. Presented SL value is the
<br /> lower of the cancer/non-cancer value if both exist.
<br /> 4. USEPA Regional Screening Levels (RSLs)for soil in industrial scenarios, May 2022. RSLs are only listed if no DTSC SL is established.
<br /> 5. Total Threshold Limit Concentration (TTLC), State of California hazardous waste criteria.
<br /> 6. Soluble Threshold Limit Concentration (STLC), State of California hazardous waste criteria.
<br /> Acronyms/Abbreviations
<br /> -- = not analyzed
<br /> DTSC = California Department of Toxic Substances Control
<br /> HERO = Human and Ecological Risk Office
<br /> HHRA= Human Health Risk Assessment
<br /> HW = hazardous waste
<br /> in-bgs = inches below ground surface
<br /> mg/kg = milligrams per kilogram
<br /> mg/L = milligrams per liter
<br /> MMF = Martin Metal Finishing Inc.
<br /> n = number of samples
<br /> NR = not reported
<br /> SD = storm drain
<br /> SU = standard unit
<br /> USEPA= United States Environmental Protection Agency
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