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TABLE 2 <br /> ANALYTICAL RESULTS GROUNDWATER <br /> SHELL SERVICE STATION <br /> 7910 LOWER SACRAMENTO ROAD,STOCKTON,CALIFORNIA <br /> (All results in parts-per-million) <br /> Monitoring Date Total Petroleum Aromatic Volatile Organics <br /> Well Collected Hydrocarbons <br /> Gasoline Benzene Toluene Ethyl- Total <br /> benzene Xylenes <br /> MW-1* 08/15/89' < 00006 < < < <br /> 05/11/90 + < 00011 < < < <br /> 10/11/90 + < < < < < <br /> 02/01/91 + < < < < < <br /> 05/08/91 + < < < < < <br /> 08/20/91 + < < < < < <br /> 11/21/91 + < < < < < <br /> 02/20/92++ < < < < < <br /> 06/12/92++ --- --- --- <br /> 08/12/92++ < < < < < <br /> MW-2 08/15/89 + < < < < < <br /> 05/11/90 + < < < < < <br /> 10/11/90 + < < < < < <br /> 02/01/91 + < < < < < <br /> 05/08/91 + < < < < < <br /> 08/20/91 + < < < < < <br /> 11/21/91 + < < < < < <br /> 02/20/92++ < < < < < <br /> 06/12/92++ < < < < 00019 <br /> 08/12/92++ < < < < < <br /> MW-3* 08/15/89 + < < < < < <br /> 05/11/90 + < < < < < <br /> 10/11/90 + < < < < < <br /> 02/01/91 + < < < < < <br /> 05/08/91 + < < < < < <br /> 08/20/91 + < < < < < <br /> 11/21/91 + < < < < < <br /> 02/20/92++ < < < < < <br /> 06/12/92++ --- --- -- - __ <br /> 08/12/92++ < < < < < <br /> NOTES < = Below Practical Quantitation Reporting Limits per"Tri-Regional Board Staff Recommendations <br /> for Preliminary Evaluation and Investigation o1 Underground Tank Sites (August 10, 1990) <br /> (PQL for BTEX = 0 0005 ppm,TPH, as gasoline and diesel = 0 05 ppm) <br /> + = Sampled by Delta Environmental Consultants, Inc,of Rancho Cordova, California <br /> ++ = Sampled by Emoon Associates of Sacramento, California <br /> R = Wells MW-1 and MW-3 are sampled semiannually <br /> - - Not sampled due to change from quarterly to semiannually <br /> I <br /> I <br /> Aegis Environmental Inc <br /> 91 231/September 28 1992 <br />