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$ridgestone/F`restone,Inc. 400 N. EI Dorado, Stockton, California <br /> February 2, 1994 Site Assessment Report —RMI 207201 Page 8 of 12 <br /> TABLE 1 <br /> TPH/BTEX <br /> Sample Dates: October 13-14, 1993 <br /> Sample Matrix. Soil <br /> Ttal <br /> Constituent TVPH-G TPH Benzene Toluene Ethylbenzene Xylenes <br /> EPA Method 8015-M 418 1 8020 8020 8020 8020 <br /> Units mg/kg mg/kg ug/kg ug/kg ug/kg ug/kg <br /> Soil Boring Samples <br /> SS-1-20' nd 300 <2 7 3 1 5 9 17 <br /> SB-1-35' nd nd <3 4 <3 4 <3 4 <6 8 <br /> SB-2-15' nd nd <3 1 <3 1 <3 1 < 6 2 <br /> SB-2-30' nd nd <3 0 3 6 <3 0 <6 0 <br /> SB-3-13' nd 24 <3 2 <3.2 <3 2 20 <br /> SB-3-35' nd nd <3 3 <3 3 <3 3 <6 6 <br /> SB-4-20' nd nd <2 7 <2 7 <2 7 <5.4 <br /> SB-4-25' nd nd <3 1 <3 1 <3 1 < 6 1 <br /> SB-5-20' nd nd <3 2 11 <3 2 20 <br /> SB-5-25' nd nd <3 1 44 <3 1 <6 3 <br /> Detection Limit <br /> nd = not detected <br /> Detection limits varied, see analytical reports in Appendix 8 5 <br /> A California Leaching Potential calculation (based on Table 2-1 in the CA-L UFT <br /> ' Manual) was performed for this site. The Leaching Potential Analysis sets <br /> regulatory compliance levels based on site-specific features A score of 44 was <br /> calculated for this site which falls into the category defining the following <br /> maximum allowable levels of TPH and BTEX that can be left in place without <br /> threatening groundwater <br /> B/T/X/E levels (ppm) — 3/ 3/1/1 <br /> TPH levels (ppm) — 100 Gasoline, 1000 Diesel <br />.r <br /> RYAN MURpHy, INCORPORATED Denver <br /> FAmboan omW C gsbuctkm Management Las <br />