SITE INFORMATION AND CORRESPONDENCE_CASE 2

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HISTORICAL GROUNDWATER ANALYTICAL DATA 3 i SHELL SERVICE STATION (WIC No. 204-4416-0202) 420 WEST KETTLEMAN LANE, LODI, CALIFORNIA (All results in parts-per-million) rr Monitoring Date Total Aromatic Volatile Organics Fecal Well Collected Petroleum Coliform Hydrocarbons EDB (CFU/100ml) Gasoline Benzene Toluene Ethyl- Total benzene Xylenes MW-1 10/16/90 < < < < < «0.0005 --- 01/16/91 < < < < < «0.0005 --- 04/22/91 < < < < < «0.0005 --- 07/08/91 < < < < < «0.0005 - 10117/91 < < < «0.0006 «0.0006 «0.01 --- 01/21/92 0.045 0.0017 < < < --- --- 03/12/92 < < < < < «0.00001 --- 04/20/92 < < < < < --- - 07/13/92 < < < < < --- --- 10/05/92 < 0.0013 < < < --- --- 01/25/93 < < < < < --- --- 04/09/93 < < < < --- --- 11/22/93 < < < < < --- --- MW-2 10/16/90 < < < < < «0,0005 --- 01/16/91 < < < < < «0.0005 >16 04/22/91 < < < < < «0.0005 >23 07/08/91 < < < < < «0.0005 >23 10/17/91 < < < «0.0006 «0.0006 «0.01 >23 -- 01/21/92_ --- — --- _ 03/12/92 --- --- --- --- --- --- 04/20192 --- --- --- --- - 07/13/92...: - c < < 'c «z 0 10/05/92 -" 01/25/93 --- - --- --- - -- -- Cy 04/09/93 --- - --- --- --- --- 11/22/93 --11/22/93 < < < < < --- NOTES: < = Below Practical Quantitation Reporting Limit, "Tri-Regional Board Staff Recommendations for Preliminary Evaluation and Investigation of Underground Tank Sites,"August 10, 1991, (PQL for BTEX = 0.0005 ppm;and TPH, as gasoline =0-05 ppm; or indicated detection limit.) << = Below indicated detection/reporting limit. EDB = Ethylene dibromide. - Not sampled/not analyzed. CFU/100ml = Colony forming units per 100 milliliter sample volume. D = Duplicate sample. As per San Joaquin County Environmental Health, MW-2 is sampled annually (next sampling is scheduled for October 1994).