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TABLE 2 <br /> ANALYTICAL RESULTS GROUNDWATER <br /> SHELL SEF11110E STATION <br /> 7910 LOWER SACRAMENTO ROAD,STOCKTON.CALIFORNIA <br /> (All results in parts-per-milhon) <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 /> MW-2 08/15/89 + < < < < < <br /> 05/11/90 + < < < < < <br /> 10/11/90 * < < < < < <br /> 02101191 + < < < < < <br /> 05/08/91 < < < < < <br /> 08/20/91 < < < < < <br /> 11/21/91 + < < < < < <br /> 02/20/92++ < < < < < <br /> 06/12/92++ < < < < 00019 <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 /> ' NOTES < _ _ Below detection limits per 'Tri-Regional Board Staff Recommendations for Preliminary Evaluation and <br /> Investigation of Underground Tank Saes (August 10, 1990)Practical Ouantltatlon Reporting Limits (POL <br /> 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 Emcon Associates of Sacramento, California <br /> Wells MW-1 and MW-3 are sampled semi-annually <br /> Not sampled due to change from quarterly to semi-annually <br /> Aegis Environmental Inc <br /> August 11 1992 <br />