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2 0 ANALYTICAL RESULTS: GROUNDWATER r <br /> 4445 PERSHING AVENUE, STOCKTON, CALIFORNIA <br /> Monitoring Date Total Aromatic Volatile Organics EDB Total Lead Organic Coliform <br /> Well Petroleum (ppb) (ppm) Lead Total/Fecal <br /> Hydrocarbons (ppm) (MPN1100 ml) <br /> Gasoline Benzene Toluene Ethyl- Total <br /> (ppm) (ppm) (ppm) benzene Xylenes <br /> (Ppm) (Ppm) <br /> MW-3 07/23/90 < < < < < «001 — — — –. <br /> 10/09/90 < < < < < c<0 01 – «1 0 —01/0"i < < < < < «0 01 _ --- - 51 <br /> 04/09/91 < < < < < «0 01 — <<1 0 --- --_ <br /> 07/17/91 015 < < < < «0 01 «1 0 — <br /> 10/08/91 < < < < < «0 01 0 008 — — — <br /> 01/21/92 < < < < < «0 01 0 01204/21/92 < < < < < —0 02 --- -- — — <br /> 07/13/92 < < < < < — — — — <br /> 90108!92 < < < < < <br /> 01/11/93 OBS OBS OBS OBS OBS OBS OBS OBS OBS OBS <br /> 04/28/93 0 160 < < < 000063 -- -- -_ --- -- <br /> 08/26/93 0 072 00033 000095 00029 00063 -- —10/01/93 < < < < < <br /> 11/22193 < < < < < <br /> 02/15/94 < < < < < - <br /> 05/10/94 < < < < < - <br /> 08/16/94 < < < < < <br /> MW-30 04/28/93 0160 < < < <br /> ( DUP-) 08/26/93 0 074 0 0032 0 00076 0 0029 -00062 <br /> -- — — --- --- <br /> NOTES EDB = Ethylene dlbromrde <br /> c = Below PrMcai Quantitation Reporting Luruts per'rn Regional Board Staff Recommendations for Preliminary Evaluabon and Invedrgatron of <br /> Underground Tank Sd (August 10 1990)(POL for BTEC-0 0005 ppm TPH as gasoline and diesel=0 05 ppm) <br /> MPN1100 ml – Mod probable number per 100 nalldrters of sample <br /> Piot analyzed <br /> ORS = obstructed <br /> 44 Lees than Irdrxted detection tlmKhTlpn as Indicated on laboratory analytical report <br /> D Duplicate sample <br /> ppm = Parts-per million <br /> ppb = Parts'per billion <br /> Fugmo <br /> W018/August 1994 <br />