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r � <br /> i <br /> Subsurface Investigation December 12, 1990 <br />' Former Unocal Station No. 2859, Stockton, California AGS 38012-5 <br /> I <br /> TABLE 2 <br />' CONCENTRATION OF HYDROCARBONS IN SOIL SAMPLES <br /> COLLECTED BENEATH UNDERGROUND STORAGE TANKS <br /> Former Unocal Service Station No. 2859 <br />' 1665 Pacific Avenue <br /> Stockton, California <br /> March and April 1988 <br />' Sample Depth Ethyl- Total <br /> Number (Feet) TPHg Benzene Toluene benzene Xylenes <br /> Gasoline Tank Cavity <br />' S-0329-1STP 16 582 0. 60 6.50 10.40 39. 10 <br /> S-0329-2STP 16 38 0. 19 <0. 05 <0. 05 1.01 <br /> S-0329-3STP 16 2 0. 14 <0.05 <0.05 <0.05 <br />' S-0329-4NTP 16 23 0. 27 1.31 0. 62 4. 05 <br /> S-0329-5NTP 16 <2 0. 13 <0. 05 <0. 05 <0.05 <br /> S-0329-6NTP 16 <2 <0. 05 <0.05 <0. 05 <0. 05 <br /> S-0329-9A 26 13 0.29 1. 07 <0. 05 1.32 <br /> S-0406-12A 28 18 1.72 5_ 01 0.58 3 .83 <br /> S-0406-13A 30 3 <0.05 <0. 05 <0. 05 <0. 05 <br /> Product Lines <br />' S-0330-11 6. 0 <0. 05 <0.05 <0. 05 <0.05 <br /> Waste-Oil Tank Cavity <br /> S-0329-8A 8 <2 <0.05 <0. 05 <0. 05 <0.05 <br /> VOC PCB's <br /> S-0329-8B <0. 05 <0. 02 <br /> IResults in parts per million (ppm) <br /> TPHg = Total petroleum hydrocarbons as gasoline <br /> < = Below detection limit for analysis <br /> used <br /> VOC = Volatile organic compounds <br /> PCB's = Poly <br /> S-0406-1STP <br /> �- Soil sample number (STP--south tank pit, N=north) <br /> Date sample collected <br /> Soil sample Y <br /> 5 <br /> Applied GeoSystems <br />