ARCHIVED REPORTS_XR0004418 - Laserfiche WebLink

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• contained 0 32 ppm Xylene was below detection limits an all soil samples except for SB24 that contained 120 ppm The laboratory analyzed all the soil samples for TPH-QaSolIj3t- and reported them as below detection limits However, samples SBI-3, SBI-4, SB1-5, SBI-6, SB2-5, SB3-3, and SB34 were noted by the laboratory to have a diesel peak pattern The lab notified WJH of this finding and received approval to analyze those samples for TPH-Diesel The following samples were then run for TPH-Diesel using EPA Method 8015M SBI-3, SBI-4, SBI-5, SB2-3, SB2-4, SB2-5, SB3-3, SB3-4, and SB3-5 All the samples were reported non-detect for diesel, but Stoddard Solvent was found in SB1-3 at 183 ppm, SBI-5 at 50 ppm, SB2-4 at 59 ppm, and SB3-3 at 10 ppm Total lead was found in alI the soil samples except for SB2-6, SB4-6, and SB4-7 The total lead levels were under the allowed linut of 50 ppm, except for soil samples SB2-2 with 56 ppm, SB3-2 with 57 ppm, an B2-4 with 890 m These three samples were analyzed by the laboratory of STLC lead using EPA Method 7420 and were reported as non-detect 7 7gpI PLATE IXA is a cross sectional diagram through the soil boring that illustrates the type and amount of contaminate reported in parts per mullion, and shows the depth of the contamination an each boring Total lead results are shown only where they exceed the 50 PPM CONCLUSIONS Based upon the results of the certified laboratory analysis, soil contamination for BTEX as presently identified in the southwestern portion of the removed product lane trench by SBI-3, SB 1-4, and SB1-5, and in the northern portion of the filled excavation that held the removed gasoline storage tanks by soil boring SB2-4 The major amounts of contamination were found an clays at fourteen (14) feet to twenty-one (21) feet below ground surface A lesser amount of contamination was found in the upper part of a seven (7) foot sand section at twenty-six (26) feet below ground surface in SBI The top of this sand layer was encountered an all five borings and ranged in depth of 20' to 30' below ground surface The base of the sand section was at +/- 311fa' in all the soil bonngs BTEX was not reported an soil borings SB3, SB4, or SB5 Neither was there any contamination reported in the clay soil below the sand section in any of the borings which were all carried to a depth of 4016 to 41 feet TPH-Gasoline was below detection limits an all of the analyzed soil samples Those soil samples that were reported by the lab as noting a diesel peak were analyzed and reported as non-detect for diesel, but instead analyzed as Stoddard Solvent for two samples an SB1, one sample in SB2, and one sample an SB3 Total lead, above the allowable level (50 ppm), was reported at eleven (11) feet below ground level an only three (3) soil samples, SB2-2, SB3-2, and SB4-2 All the other samples were 5