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1 Oge3of3 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 6020 <br /> 1711 East Yosemite Avenue,Manteca CA <br /> Well Depth to Groundwater Groundwater <br /> Well Date of Elevation Water Elevation Elevation TPHg B T E X MtBE DO <br /> Number Sampling _ (Feet) (Feet) (Feet) Change(ft) _(Ng/L) (pg/L) (pg1L) (pglL) WL) (pg/L) _ (m9 L) <br /> MW 11 7/28/2003 P 44 18 2370 2048 <50 <0 5 <05 <0 5 <0 5 <0 5" 42 <br /> 11/26/2003 P 2378 2040 -008 <50 <05 073 <0 5 054 <0 5' 48 <br /> MW-12 7/28/2003 P 4383 2335 2048 <50 <0 5 <05 <0 5 <0 5 <0 5` 30 <br /> 11/26/2003 P 2339 2044 -004 <50 <0 5 <0 5 <0 5 <0 5 <0 5' 25 <br /> MW 130 7/28/2003 P 4351 2426 1925 -- <50 <0 5 <0 5 <0 5 <0 5 7 8' 31 <br /> 11/26/2003 P 2419 1932 007 <50 05 083 <0 5 06 26* 1 5 <br /> TB-1 12/20/2001 - - -- <50 <0 5 <05 <0 5 <0 5 <2 5 -- <br /> QCTB 3/20/2002 - <50 <0 5 <0 5 <0 5 <0 5 <2 5 <br /> Notes <br /> = not measured or analyzed <br /> = MTBE by EPA Method 8260B PlNP = prgedlnot purged <br /> < = below given laboratory detection limit TB 1 = QCTB(trip blank) <br /> DO W Dissolved oxygen TPHg = Total petroieum hydrocarbons as gasoline <br /> It = feet (reported as gasoline range organics(GRO]) <br /> mg/L = rndligrams per liter TOC = top of casing <br /> MSL = mean sea level pg/L = micrograms per liter <br /> MtBE = Methyl tert butyl ether <br /> Data Qualifier Definitions <br /> U The analyte was analyzed for but was not detected above the sample reporting limit <br /> J The analyte was positively Identified the associated numerical value is the approximate concentration of the analyte in the sample <br /> N The analysis Indicates the presence of an analyte for which there is presumptive evidence to make a"tentative Identification" <br /> NJ The analysis Indicates the presence of an analyte that has been"tentatively Identified"and the associated numerical value represents Its approximate <br /> concentration <br /> UJ The analyte was not detected above the reported sample reporting limit However,the reported reporting limit Is approximate and may or may not <br /> represent the actual limit of quantitation necessary to accurately and precisely measure the analyte In the sample <br /> R The sample results are rejected due to:dentiflcation or other analytscal Issues <br /> NO Not detected above reported detection llmst <br /> 4%WprocessQ5 BP AA=0602050uarterly'A OTR 0316020 GWMR 4003 <br />