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Table 3 Geosyntec Consultants Statistical Summaries of Chemicals Analyzed in Soil and Comparison to Industrial/Commercial Screening Levels- Skeet Trap Subarea Site 47,Port of Stockton Min Mean Max No.of EF of Detected EF of Detected Max EF Is Analyte Max EF Max EF No.of No.of t as.d Max Conc. Min ND Mean ND Max ND No.of NDs EF of NDs Is SL Background FOD HH SL Reference HH SL' Units Detected Detected Detected Detections Values E1'of NDs Values (max Conc.(D) (max detect/ Background Samples Detections Canc Canc Canc. Depth Conc. Conc Conc. >SL >SL >2x the SL >2x the SL >2x the SL detect/the SL) Available? >SL? Soil SL background) >SL Metals(mg/kg) Aluminum 25 25 100% EPA Industrial RSL(NC) 1100000 mg/kg 11,600 21,900 49,600 1 - 0 0 0% 0% 0 0 0 Y - fl44 1 N Antimony 25 4 16% EPA Industrial RSL(NC) 470 mg/kg 0.64 2.23 4.5 0 0.47 1 2.4 0 0 0% 0% 0 0 0 Y - - Arsenic 88 87 99% DTSC HHRA Note 3 Industrial RSL(C) 0.36 mg/kg 4.6 99.8 1490 2 0.28 0.3 0.28 87 0 99% 0% 0.99 0 4138.9 Y Y 48.5 Y Barium 25 25 100% EPA Industrial RSL(NC) 220000 mg/kg 135 201 365 1 0 0 0% 0% 0 0 0 Y - 0.8 N Beryllium 25 18 72% DTSC HHRA Note 3 Industrial RSL(NC) 230 mg/kg 0.46 0.903 2 1 0.03 0.7 1.2 0 0 0% 0% 0 0 0 Y - - Cadmium 25 1 4% DTSC HHRA Note 3 Industrial RSL(NC) 780 mg/kg 0.76 0.76 0.76 2 0.03 0.4 1.5 0 0 0% 0% 0 0 0 Y - - Calcium 25 25 100% 3,520 6,670 21,600 0 - - - 1.9IN Chromium 25 25 100% 27.5 45.1 81.9 1 - 0.9_ _ _ _ _ _ _ _ _ _ _ _ _ _Cobalt 25 25 100% EPA Industrial RSL(NC) 350 mg/kg 9 12.9 23.3 1 0 0 0% 0% 0 0 0.1 Y - 20.25 1.2Copper 25 25 100% EPA Industrial RSL(NC) 47000 mg/kg 19.7 35.3 63.2 1 0 0 0% 0% 0 0 0 Y - Iron 25 25 100% EPA Industrial RSL(NC) 820000 mg/kg 15,400 25,100 36,800 1 0 0 0% 0% 0 0 0 Y - 44,978 0.8Lead 29 28 97% DTSC 14HRA Note 3 Industrial RSL(NC) 320 mg/kg 5.8 37.4 306 0 0.24 0.2 0.24 0 0 0% 0% 0 0 1 Y - 16.8 18.2Magnesium 25 25 100% 4,760 6,630 10,100 1 - 11,894 0.8_ _ _ _ _ _ _ _ _ _ _ _ _ _Manganese 25 25 100% EPA Industrial RSL(NC) 26000 mg/kg 362 608 2260 0 0 0 0% 0% 0 0 0.1 Y - 1,154 2 Mercury 25 12 48% DTSC HHRA Note 3 Industrial RSL(NC) 4.4 mg/kg 0.06 0.101 0.17 0 0.05 0.1 0.2 0 0 0% 0% 0 0 0 Y - - Molybdenum 29 11 38% EPA Industrial RSL(NC) 5800 mg/kg 1.3 2.88 1 6.8 1 1 0.1 10.5 48.1 0 1 0 0% 1 0% 0 1 0 0 Y - Nickel 25 25 100% DTSC HHRA Note 3 Industrial RSL(NC) 11000 mg/kg 27.7 45 99.4 1 0 0 0% 0% 0 0 0 Y - 97.36 1 Y _ _ _ _ Potassium 25 25 100% 1210 1,850 2,310 0 - 3,271 0.7 N _ _ _ _ _ _ _ _ _ _ Selenium 29 12 41% EPA Industrial RSL 5800 mg/kg 0.35 1.27 2.1 1 0.32 0.5 0.98 0 0 0% 0% 0 0 0 Y - Silver 25 1 4% EPA Industrial RSL 5800 mg/kg 0.08 0.08 0 0 0.07 0.9 2.9 0 0 0% 0% 0 0 0 Y - Sodium 25 23 92% 371 1,130 2,000 0 4.96 24.2 43.5 - 3,148 0.6 N Thallium 25 8 32% EPA Industrial RSL(NC) 12 mg/kg 5 5.69 6.7 1 0.13 0.9 1.7 0 0 0% 0% 0 0 0.6 Y - Vanadium 25 25 100% EPA Industrial RSL 5800 mg/kg 4L2 73 112 1 0 0 0% 0% 0 0 0 Y 157.3 0.7 N Zinc 25 25 100% EPA Industrial RSL 350000 mg/kg 42.8 85.7 175 0 0 0 0% 0% 0 1 0 0 Y - 113.6 L5 Y Volatile Organic Compounds(µg/kg) I,1,1-Trichloroethme 16 0 0% DTSC HHRA Note 3 Industrial RSL INC) 7200000 µg/kg 11 13.1 16 0 0 0% 0% 0 0 - Y - - 1,1,2,2-Tetrachlomethane 16 0 0% DTSC HHRA Note 3 Industrial RSL(C) 2700 µg/kg 11 13.1 16 0 0 0% 0% 0 0 - Y - - 1,1,2-Trichloroethme 16 0 0% EPA Industrial RSL(C) 5000 µg/kg 11 13.1 16 0 0 0% 0% 0 0 - Y - - - I,1-Dichloroethane 16 0 0% DTSC HHRA Note 3 Industrial RSL(C) 16000 µg/kg I1 13.1 16 0 0 0% 0% 0 0 - Y - - - I,1-Dichloroethene 16 0 0% DTSC HHRA Note 3 Industrial RSL INC) 350000 pg/kg I1 13.1 16 0 0 0% 0% 0 0 - Y - - - 1,2-Dichlomethane 16 0 0% EPA Industrial RSL(C) 2000 µg/kg I1 13.1 16 0 0 0% 0% 0 0 - Y - - - 1,2-Dichloroethene 16 0 0% _ I1 13.1 16 _ _ - - - - - _ _ _ _ _ _ 1,2-Dichloropmpane 16 0 0% EPA Industrial RSL(C) 11000 µg/kg 11 13.1 16 0 0 0% 0% 0 0 - Y - - - - 1,3-Dichloropropene,cis- 16 0 0% - 11 13.1 16 - - - - - - - - 1,3-Dichloropropene,trans- 16 0 0% I1 13.1 16 - - - - _ _ _ _ _ _ _ _ _ _ _ _ _ 2-Hexanone(Methyl butyl ketone) 16 0 0% EPA Industrial RSL(NC) 1300000 µg/kg 11 13.1 16 0 0 0% 0% 0 0 - Y - - - - 4-Methyl-2-pentanone(Methyl isobutyl ketone) 16 0 0% EPA Industrial RSL(NC) 140000000 µg/kg - - - - 11 13.1 16 0 0 0% 0% 0 0 - Y - - - - Acetone 16 0 0% EPA Industrial RSL(NC) 670000000 µg/kg - - - - 11 13.1 16 0 0 0% 0% 0 0 - Y - - -Be- 16 1 6% DTSC HHRA Note 3 Industrial RSL(C) 1400 µg/kg 4 4 4 l 11 13.3 16 0 0 0% 0% 0 0 0 Y - - - - Bromodichloromethane 16 0 0% DTSC HHRA Note 3 Industrial RSL(C) 1300 µg/kg - - - - 11 13.1 16 0 0 0% 0% 0 0 - Y - - - - Bromoform(Tribromomethane) 16 0 0% DTSC HHRA Note 3 Industrial RSL(C) 86000 µg/kg - - - - 11 13.1 16 0 0 0% 0% 0 0 - Y - - - - Bromomethane(Methyl bromide) 16 0 0% EPA Industrial RSL(NC) 30000 1 µg/kg - - - - 11 13.1 16 0 0 _0% 0% 0 0 - Y - - - - Carbon disulfide 16 0 0% EPA Industrial RSL(NC) 3500000 µg/kg 11 1 13.1 16 1 0 0 0% 0% 0 0 1 - Y - - - - Carbon tetrachloride(Tetmchloromethme) 16 0 0% DTSC HHRA Note 3 Industrial RSL(C) 2900 µg/kg - - - - 11 13.1 16 0 0 1 0% 0% 0 0 - Y - - - - Chlorobenzene 16 0 0% EPA Industrial RSL(NC) 1300000 µg/kg - - - - 11 13.1 16 0 0 0% 0% 0 0 - Y - - - - Chloroethane 16 0 0% EPA Industrial RSL(NC) 57000000 µg/kg - - - - 11 13.1 16 0 0 0% 0% 0 0 - Y - - - - Chloroform 16 1 6% EPA Industrial RSL(C) 1400 µg/kg 11 11 11 1 11 13.3 16 0 0 0% 0% 0 0 0 Y - - - - Chloromethane 16 0 0% EPA Industrial RSL(NC) 460000 µg/kg - - - 11 13.1 16 0 0 0% 0% 0 0 - Y - - - - Dibromochloromethane 16 0 0% DTSC HHRA Note 3 Industrial RSL(C) 4100 µg/kg - - 11 13.1 16 0 0 0% 0% 0 0 - Y - - - - Dichloromethane(Methylene chloride) 16 0 0% DTSC HHRA Note 3 Industrial RSL(C) 26000 µg/kg - - 11 13.1 16 0 0 0% 0% 0 0 Y Docosanoic acid 2 2 100% _ _ _ 290 345 400 I _ _ _ _ _ _ _ _ _ Ethylbenzene 16 0 0% EPA Industrial RSL(C) 25000 µg/kg 11 13.1 16 0 0 0% 0% 0 0 Y Hexachlorobutur iene(Hexachloro-1,3-butadiene) 28 0 0% DTSC HHRA Note 3 Industrial RSL(C) 5300 µg/kg 350 420 490 0 0 0% 0% 0 0 Y Methyl ethyl ketone(2-Butanone) 16 0 0% EPA Industrial RSL(NC) 190000000 µg/kg 11 13.1 16 0 0 0% 0% 0 0 Y Styrene 16 0 0% DTSC HHRA Note 3 Industrial RSL(NC) 32000000 µg/kg 11 13.1 16 0 0 0% 0% 0 0 Y Truschloroethene(PCE) 16 0 0% DTSC HHRA Note 3 Industrial RSL(C) 2700 µg/kg 11 13.1 16 0 0 0% 0% 0 0 Y Toluene 16 0 0% DTSC HHRA Note 3 Industrial RSL(NC) 5300000 µg/kg 11 13.1 16 0 0 0% 0% 0 0 Y Total xylene(reported,not calculated) 16 0 0% EPA Industrial RSL(NC) 2500000 µg/kg 11 13.1 16 0 0 0% 0% 0 0 Y Trichloroethene(ICE) 16 0 0% EPA Industrial RSL(C) 6000 µg/kg 11 13.1 16 0 0 0% 0% 0 0 Y Vinyl chloride 16 0 0% DTSC HHRA Note 3 Industrial RSL(C) 150 µg/kg - - - 11 13.1 16 0 0 0% 0% 0 1 0 - Y - - - - Rough and Ready Island Port of Stockton Remediation Management Page 1 of 3 February 2022