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TABLE 2 ANALYTICAL RESULTS GROUNDWATER SHELL SERVICE STATION(Wlc No 204 7324-0006) 7910 LOWER SACRAMENTO ROAD STOCKTON CALIFORNIA (Alt results in parts-per-million) . Monitoring Date Total Petroleum Aromatic Volatile Organics Well Collected Hydrocarbons _F Gasoline Benzene Toluene Ethyl- Total benzene Xylenes MW-1" 08/15/89 < 00006 < < < 05111/90 < 00011 < < < 10/11/90 < < < < < 02/01/91 < < < < < 05/08/91 < < < < < 08/20/91 < < < < < 11/21/91 < < < < < 02/20/92 < < < < < 06/12/92 --- --- --- — -- 08/12/92 < < < < < 11/05/92 -- -- — -- 02/19/93 < < < < < 08/26/93 < < < < < MW-2 08/15/89 < < < < < 05111/90 < < < < < 10/11/90 < < < < c 02/01/91 < < < < < 05/08/91 < < < < < 08/20/91 < < < < < 11121/91 < < < < < 02/20/92 < < < < < 06/12/92 < < < < 00019 08/12/92 < < < < < 11/05/92 < < < < < 02/19/93 < < < < < 08/26/93 < < < < < MW-3" 08/15/89 < < < < < 05/11/90 < < < < c 10/11/90 < < < < < 02/01/91 < < < < < 05/08/91 < < < < < 08/20/91 < < < < < 11/21/91 < < < < < 02/20/92 < < < < < 06/12/92 -- --- --- -- - 08/12/92 < < < < < 11/05/92 - -- --- 02/19/93 < < < < c 08/26/93 c < < < < MW-30 02/19/93 c < < < < ( Dup ) 08/26/93 < < < < < NOTES - Below Practical Quantitation Reporting Limits per 'Tri Regional Board Staff Recommendations for Preliminary Evaluation and Investigation of Underground Tank Sites {August 10 1990) (PQL for STEX=0 0005 ppm TPH as gasoline and diesel=0 05 ppm) = Wells MW 1 and MW 3 are sampled semiannually Not sampled due to change from quarterly to semiannually D - Duplicate sample Samples collected through 11121/91 by Delta Environmental Consultants Inc of Rancho Cordova California Samples collected from 02/20192 through 11105192 by EMCON Associates of Sacramento California Samples collected after 11105193 by Blaine Tech Sevices Inc of San Jose California so Aegis Environmental Inc 91 23110ctober 5 1993