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TABLE B-2 <br /> SUMMARY OF PESTICIDE CONCENTRATIONS IN PRE-EXCAVATION SOIL <br /> AND HEALTH-BASED CRITERIA FOR SOIL INGESTION <br /> PHASE II SITE INVESTIGATION AND SITE CLOSURE REPORT <br /> CAL-FARM SUPPLY STOCKTON FACILITY <br /> K/J/C 882526.01 <br /> Proposed <br /> Concentration RCRA Criteria Prop 65 Potentially <br /> Range for Averages EPA for Systematic No Significant Relevant <br /> Frequency of Detected Values Concentration Carcinogen b Toxicantsc RCRA d Risk Criteria Risk Criteria <br /> Pesticide Detection MAD MAO Classification MAO RSD (u4/Kg) NOW (ug/Kg)_ <br /> alpha-BH*C 1/24 100 62 B - 110f 3,000 110 <br /> Endosulfan 1 1/24 1,200 106 Unk 4,000 - - 4,000 <br /> Endosulfan I1 2/24 70 - 310 71 Unk 4,000 - - 4,000 <br /> 4,44-DDE 23/24 32 - 39,000 2,185 B - 2,100 - 2,100 <br /> 4,4j-DDD 23/24 67 - 60,000 3,344 B - 2,900 - 2,900 <br /> 4,41-DDT 23/24 96 - 190,000 8,672 B 40,0009,h 2,100 20,000 2,100 <br /> Methoxychlor 9/24 25 - 1,900 227 D - - - <br /> Atrazine 1/13 6.1 1 8 C 400,000f,g - - 400,000 <br /> Simazine 1/13 51 5 4 Unk - - - - <br /> a Arithmatic average calculated using one-half the detection limit for chemical concentrations not detected <br /> b EPA Carcinogen Classification <br /> Group B = probable human carcinogen <br /> Group C = possible human carcinogen <br /> Group D = not classifiable <br /> C Source: RCRA Facility investigation (RFI) Guidance Document, EPA, May 1989, Table 8-7 for Systematic Toxicants <br /> d Source: RCRA Fa5ility Investigation (RFI) Guidance Document, EPA, May 1989, Table 8-6 for Carcinogens, RSD = Risk-specific Dose for 10.6 risk for Class A and B, <br /> and 10 risk for Class C <br /> e Source: California Code of Regulations, Title 22, Proposed Amendment to Section 12711 <br /> f EPA Integrated Risk Information System (IRIS) <br /> g Target organ = liver <br /> h Target organ = kidney <br /> Unk = Unknown <br /> = Not Available <br /> WPI13 882526 01 <br />