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M = = = = MINMM <br /> Tabe4 3of3 <br /> Groundwater Elevation and Anatytical Data <br /> ARCO Service Station#6020 <br /> 1711 E Yosemite Ave 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) {41-) (99/1-) (1-41-) (µg/L) (pg/L) (1,9&) (mg&) <br /> MW-11 7/28/2003 P 4418 237 2048 -031 <50 <0.5 <0 5 <0 5 <0 5 <0.5 42 <br /> MW-12 7/28/2003 P 4383 2335 2013 -035 <50 <0.5 <0 5 <0 5 <0 5 <0.5 30 <br /> MW-13D 7/28/2003 P 4351 2426 1925 -088 <50 <0 5 <0 5 <0 5 <0 5 7.8 31 <br /> TB-1 12/20/2001 -- — -- -- <50 <0 5 <0 5 <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 /> TPHg Total petroleum hydrocarbons as gasoline(reported as gasoline range organics(GRO)) <br /> MSL mean sea level <br /> MtBE Methyl tert-butyl ether not measured or analyzed <br /> PMP prged/not purged MTBE by EPA Method 82606 <br /> TB-1 QCTB(trip blank) < below given laboratory detection limit <br /> i <br /> TOC top of casing DO Dissolved oxygen <br /> µg11- micrograms per Mer it feet <br /> mg/L milligrams per liter <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 xientification" <br /> NJ The analysis indicates the presence of an anatyte 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 mayor 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 serious deficiencies in the ability to analyze the sample (i e,the presence or absence of the analyte cannot be <br /> verified)or the analyte identification has been rejected(i e,the presence of the analyte cannot be venfied) <br /> ND Not detected above reported detection limit <br /> k U5 SP ARCOM020 <br />