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TABLE 2 (CONTINUED) <br /> ANALYTICAL RESULTS GROUNDWATER <br /> SHELL SERVICE STATION <br /> 520 WEST CHARTER WAY STOCKTON CALIFORNIA <br /> (All results in parts-per-million) <br /> I <br /> • Monitoring Date Total Petroleum Aromatic Volatile Organics <br /> Well Collected Hydrocarbons <br /> Gasoline Benzene Toluene Ethyl- Total <br /> benzene Xylenes <br /> MW-7 01/10/90 FLH FLH FLH FLH FLH <br /> 03/28/90 FLH FLH FLH FLH FLH <br /> 07/31/90 FLH FLH FLH FLH FLH <br /> 10/24/90 FLH FLH FLH FLH FLH <br /> 01/31/91 FLH FLH FLH FLH FLH <br /> 04/26/91 54 45 73 1 7 74 <br /> 07/23/91 FLH FLH FLH FLH FLH <br /> 10/30/91 1 30 2 5 6 4 1 6 10 <br /> 01/28/92 FLH FLH FLH FLH FLH <br /> 04/30/92 FLH FLH FLH FLH FLH <br /> 07/10/92 14 022 1 4 054 26 <br /> 10/09/92 FLH' FLH' FLH' FLH' FLH' <br /> 02/19/93 43 036 1 4 1 0 53 <br /> 05/28/93 11 0 140 0 210 0 290 1 1 <br /> 08/27/93 29 0 063 0 060 0 067 0 280 <br /> MW-8 03/28/90 86 27 0 250 0 030 0 520 <br /> 07/31190 26 8 4 0 740 0 200 0 400 <br /> 10/24190 16 68 0 180 0 140 0 170 <br /> 01/31/91 17 85 037 021 045 <br /> 04/26/91 15 6 3 026 015 039 <br /> 07/23191 15 64 03 015 035 <br /> • 10/30/91 21 51 021 0 097 012 <br /> 01/28/92 17 50 0 12 014 0 26 <br /> 04/30/92 13 46 0 092 013 0 1 0 <br /> 07/10/92 72 35 < 0 097 < <br /> 10/09/92 29 26 37 < 57 <br /> 02/20/93 66 1 2 0 081 0 069 065 <br /> 05/28/93 12 0 110 0 150 0 027 34 <br /> 08/27/93 11 < 0 140 0 071 24 <br /> MW-80 10!09192 27 22 3 < 58 <br /> { X-Dup ) <br /> NOTES FLH = Floating liquid hydrocarbons <br /> = Below Practical Quantdat*n Reponing Limits per Tri Regional Board Staff Recommendations for Preliminary Evaluation and Investigation of <br /> Underground Tank Sites (August 10 1990) (POL for BTEX=0 0005 ppm TPH as gasoline and diesel=0 05 ppm) <br /> NS = Not sampled <br /> FLH = Skimmer in well(installed on October 9 1992) <br /> O = Duplicate sample <br /> Aegis Environmental Inc <br /> 91 24610ctober 12 1993 <br />