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' PROBLEM ASSESSMENT REPORT Moreland Court Shell 7700 Moreland Court, Stockton,California Delta Project No 40-88-146 Page 7 ' TABLE 4 ' Chemical Analysis of Soil Sample From the Product Line Trenches (ppm) Sample Sample Date Depth Ethyl- Organic Identification Collected f fMtJ Benzene Toluene benzene Xylenes TPH EDB Lead ' PL-1 01/03/89 4 <0 001 <0 001 <0 001 <0 001 <10 0 <0001 <0 05 PL-2 01/03/89 4 <0 001 <0001 <0001 <0 001 <100 <0 001 <0 05 ' PL-3 01/03/89 4 <0001 <0001 <0 001 <0 001 <10 0 <0 001 <005 PL-4 01/03/89 4 <0001 <0 001 <0 001 <0001 <100 <0 001 <005 PL-5 01/03/89 4 <0 250 422 300 1460 1,130a <0 001 <0 05 ' PL-6 01/03/89 4 0 680 388 114 41 1170 <0 0025 <005 aIdentifed as gasoline ' The chemical analyses for the product line trench soil samples PL-1 through PL-4 were below the detection limits for BTEX and TPH The concentrations of TPH for soil samples PL-5 and PL-6 were 1,130 and 117 ppm, respectively Concentrations of BTEX in soil sample PL-5 were <0 250, 42 2, 30 0, and 146 0 ppm, ' respectively Concentrations of BTEX in soil sample PL-6 were 0680, 388, 114, and 41 ppm,respectively Organic lead and EDB chemical results were below detection limits for each soil sample submitted from the product line trench ' 2 4 Phase I Hvdrogeologic Investigation Results Two soil borings (SB-7 and SB-8) were advanced at the site on August 8, 1989 The borings were located in areas where petroleum constituents had been detected in soil samples collected during excavation and removal of the former tanks and associated product lines Table 5 presents analytical data from the soil boring samples collected Laboratory analytical data sheets are presented in Appendix F Soil boring logs ' for soil borings S13-7 and SB-8 are provided in Appendix D