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WW City of Stockton, Fire Station No. 12 A68105.01 August 7, 1995 Page 7 r ...::.:. .; :.;,::::.......:: :::a'S[711 AILY'UF50) ''.5ATiRP1 1tNAT.Y'I1CAL 12ESC1LTS ... ................ ... ......... .... .. :.:.... .;.. ... :.:.. - FIRLSi'!1'IIOI�L 12::s::;:.,::>.r> <<.::>>:::>:......... .::..><>::>;:::r :::::::>::::.....::>:: • Jaric .......... :::.:........ ............ ..........::::.....:: .....::::::. ::>::::>::. .. 1995.;:::......:;:::..:: »::>:::>...............:::::::.::: ................................................................................................................... Depth Benzene Toluene Ethyl-benzene Xylenes TPH-G TPH-D FBSG mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg r.r Soil Borin B-2 10' <0.025 <0.025 <0.025 <0.025 23 19 v 15 <0.005 <0.005 <0.005 <0.005 <1.0 <2 20 <0.005 <0.005 <0.005 <0.005 <1.0 <2 25 <0.005 <0.005 <0.005 <0.005 <1.0 <2 30 <0.005 <0.005 <0.005 <0.005 <1.0 <2 35 <0.005 <0.005 <0.005 <0.005 <1.0 <2 Soil Boring B-3 10 <0.005 <0.005 <0.005 <0.005 <1.0 <2 20 <0.005 <0.005 <0.005 <0.005 <1.0 <2 r 30 <0.005 <0.005 <0.005 <0.005 <1.0 <2 Soil Boring B-4 V 10 <0.005 <0.005 <0.005 <0.005 <1.0 <2 20 <0.005 <0.005 <0.005 <0.005 <1.0 <2 U.d 30 <0.005 <0.005 <0.005 <0.005 <1.0 <2 F13SG = feet below site grade y mg/kg = milligrams per kilogram TPH-G = total petroleum hydrocarbons-gasoline range TPH-D = total petroleum hydrocarbons-diesel range < = less than = detection limit for reporting purposes was raised due to matrix interference r Analytical results for soil samples collected from soil boring B-2 indicate that concentrations of PPCs are present in soil at the location of the former USTs. The analytical results of soil samples collected from greater than 10 feet BSG in soil boring B-2 and each soil sample collected from soil borings B-3 and B-4 were below the detection limit for reporting purposes for BTEX, TPH-G, and TPH-D. 6.0 EVALUATION v The soil sample analytical results were evaluated to assess the extent of PPC migration in soils. In addition, the data were evaluated to assess potential environmental effects of PPC migration.