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TABLE 2(CONTINUED) ANALYMAL RESULTS GROUNDWATER SHELL SFRVICE STATION 620 WEST CHARTER WAY SFOCKTDN CALIFORNIA (AM results in pertsl"-mdlwn) Monitoring Date Total Petroleum Aromatic Volatile Organics Well Collected Hydrocarbons Gasoline Benzene Toluene Ethyl- Total benzene Xylenes MW 4 12/18/89 25 0 025 0 004 < 0 070 03/28/90 10 0 0 290 0 270 00015 0 290 07/31/90 FLH FLH FLH FLH FLH 10/24/90 FLH FLH FLH FLH FLH 01/31/91 FLH FLH FLH FLH FLH 04/26/91 FLH FLH FLH FLH FLH 07/23/91 FLH FLH FLH FLH FLM 10/30/91 FLH FLH FLH FLH FLH 01/28/92 FLH FLH FLH FLH FLH 04/30/92 FLH FLH FLH FLH FLH 07/10/92 FLH FLH FLH FLH FLH 10/09/92 FLH* FLH' FLH* FLH* FLH* 02/19/93 FLH FLH FLH FLH FLH MW 5 01/10/90 0 100 < < < 000051 03/28/90 1 6 00033 0 012 00012 0 019 07/31/90 1 4 0 150 0 020 0 043 0 039 10/24/90 086 0 220 0 022 0 038 0 036 01/31/91 140 11 52 19 74 04/26/91 67 30 0 050 018 Oil 07/23/91 22 89 09 069 0 9 10/30/91 19 38 023 027 050 01/28/92 34 92 044 0 83 12 04/30/92 23 81 035 076 13 07/10/92 25 92 11 1 0 1 9 10/09/92 16 33 036 < 23 02/19/93 017 00074 000061 00027 00035 MW 6 01/10/90 < < < < < 03/28/90 < < < < < 07/31/90 < < < < < 10/24/90 < < < < < 01/31/91 < < < < < 04/26/91 < < < < < 07/23/91 <<0 12 <<0 0011 <<0 0087 <<0 0029 <<0 018 10/30/91 < < < < < 01/28/92 < < < < < 04/30/92 < 000040 < < < 07/10/92 < < < < < 10/09/92 < < 0 067 < 00014 02/20/93 < < < < < MW-6D 07/10/92 < < < < < ( Dup) 02/19/93 < < < < < NOTES FLH = Floating liquid hydrocarbons < = Below Practical Quantnation Reporting Limits per Tri Regional Board Staff Recommendations for Preliminary Evaluation and Investigation of Underground Tank Sites (August 10 1990) (PQL for BTEX-0 0005 ppm TPH as gasoline and diesel-0 05 ppm) " = Below indicated detection limit labeled in the analytical laboratory reports FLH" = Skimmer m well(installed October 9 1992) 0 Ouolicate sample 1b Aegis Environmental Inc 91 246/March 30 1993