ARCHIVED REPORTS XR0004922 - Laserfiche WebLink

Home Browse Search

I Table 1 Groundwater Elevation and Analytical Data ARCO Service Station No 6080 85 E Louise Ave, Lathrop CA Top of Casing Depth to Water Level Ethyl- Total Well Date P/ Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO Number Sampled NP (feet msq (feet bgs) (feet msl) (pg1L) (pg/L) (pg/L) (Ng1L) (pgIL) (/vg/L) (440 (mg/L) Comments MW-3 9/8/2000 NP 1400 905 495 <50 -- <05 <0 5 <0 5 <0 5 <2 0 — 12/11/2000 NP 1400 951 449 <50 — <05 <0 5 <05 <0 5 <2 0 — 3/22/2001 P 1400 845 555 <50 — <05 <0 5 <0 5 <0 5 <26 — 6/25/2001 P 1400 891 509 <50 -- <0 5 <0 5 <0 5 <05 <2 0 — 9/24/2001 P 1400 994 406 <50 — <0 5 <0 5 <0 5 <0 5 <2 0 — 12/3/2001 P 1400 985 415 <50 — <0 50 <0 50 <0 50 <0 50 16 — 3/18/2002 P 1400 850 550 <50 — <0 50 <0 50 <0 50 <0 50 062 -- 6/20/2002 P 1400 935 465 <50 -- <0 50 <0 50 <0 50 <0 50 056 -- 9/9/2002 P 1400 953 447 <50 — <0 5 <0 5 <0 5 <0 5 055 -- 12/6/2002 P 1400 1014 386 <50 -- <0 5 <0 5 <0 5 <0 5 1 8 -- 03/14/2003 P 1400 950 450 <50 — <0 50 <0 50 <0 5o <0 50 <0 50 173 06/06/2003 P 1400 903 497 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50 297 09/1512003 P 1400 998 402 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50 105 12/04/2003 P 1400 973 427 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50 — 03/05/2004 P 1400 943 4 57 <50 <0 50 1 <0 50 <0 50 <0 50 <0 50 196 TPHg=Total petroleum hydrocarbons as gasoline{reported as GR0-gasoline range organics in analytical report) TPHd=Total petroleum hydrocarbons as diesel(reported as DRO-diesel range organics in the analytical report) MtBE=Methyl tert-butyl ether DO=Dissolved oxygen bgs=below ground surface msl=mean sea level pg/L=micrograms per liter mg/L=milligrams per liter P/NP=purged/not purged <=below given laboratory detection limits —=not measured or analyzed Beginning 3/94/2003-TPHg and BTEX analyzed by EPA Method 82608 [1)=Chromatogram Pattern Weathered Gasoline C6-C12+Unidentified Hydrocarbons C6-C12 [2]=Chromatogram Pattern Unidentified Hydrocarbons C6-C12 Data Qualifier Definitions U=The analyte was analyzed for,but was not detected above the sample reporting lima J=The analyte was positively identified,the associated numerical value is the approximate concentration of the analyte in the sample N=The analysis indicates the presence of an analyte for which there is presumptive evidence to make a tentative identification NJ=The analysis indicates the presence of an analyte that has been tentatively identified and the associated numerical value represents its approximate concentration UJ=The analyte was not detected above the reported sample reporting limit However,the reported reporting limit is approximate and mayor may not represent the actual limit of quanbtabon necessary to accurately and precisely measure the analyte in the sample Report Date ApnI 12, 2004 Page 2 of 3