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C-SHADIRFS92.4/wPADD 1.19 <br /> 07/21/92 <br /> dieldrin were detected in all but CHLOR 1 (Table 3-1). The highest levels of <br /> DDE (21.4 µg/g) and DDT (104 pg/g) were found at CHLOR 1; smaller <br /> quantities of DDE were also measured at CHLOR 2 and 5, and smaller quantities <br /> of DDT at all but CHLOR 4. No other pesticides were found in any of the <br /> samples. <br /> Twenty additional soil samples (CHLOR 6 through CHLOR 25, plus a duplicate) <br /> were subsequently collected, also part of the most recent investigation, at the <br /> pesticide mix area. CHLOR 6 through 11 were collected along the length of the <br /> drainage ditch, and CHLOR 12 through 25 were collected in the area north of <br /> Bldg. T-40 and east of Bldg. T-9. CHLOR 9, 11, and 13 were collected from <br /> depths of 1 to 1.5 ft; all of the other samples were collected at the surface (0 to <br /> 0.5 ft). All of the samples were analyzed for organochlorine pesticides. All but <br /> one sample contained low levels of chlordane (maximum 2.70 µg/g at CHLOR 8) <br /> (Table 3-1). DDD was detected in all but five of the samples at a maximum <br /> concentration of 4.61 µg/g at CHLOR 16, DDE in all but six samples at a <br /> maximum concentratiog of 31.5 µg/g at CHLOR 16, and DDT in all but two <br /> samples at a maximum concentration of 181 µg/g at CHLOR 16. None of the 20 <br /> samples contained measurable quantities of dieldrin. <br /> I <br />