Laserfiche WebLink
To <br /> Historical Groundwater Monitoring and Analytical Data <br /> 7-Eleven Store;!19976 <br /> 1399 North Main Street <br /> Manteca CA <br /> Well IDI Ethyl- MtBE 7,2- Eth- Meth- Dissolved <br /> Elevation Date Benzene Toluene Benzene Xylene TPH-G 8020 MtBE TBA DIPS EtBE TAME DCA EDB anol anol Notes Oxygen DTW SPT WTE <br /> TOC (pg1L (pg1L) (pt)L) WIL) WIL) (u !L) (pg1L) (pg1L) (pgff (p91L) ( 1L) (pg1L) (pgn-) (m fL m (MOIL) 1 f tl (to" <br /> E <br /> Explanation <br /> TPHg=Total petroleum hydrocarbons as-gasoline 1 2 DCA=1 2 Dichloroethane pg/L=micrograms per liter <br /> MtBE=Methyl-tert-butyl ether EDB=1 2-Dibromoethane mg1L=milligrams per liter <br /> TBA=Tert-butanol DTW=Depth to water —=Not sampledlnot measured <br /> DIPS=Diisopropyl ether SPT=Separate-phase hydrocarbon thickness <br /> ELBE=Ethyl tert butyl ether WTE=Water table elevation <br /> TAME=Tert arn*methyl ether TOC=Top of casing elevation in feet above mean sea level <br /> Notes <br /> Historical data prior to 03/07/03 sample date provided by Shaw E&I BTEX TPHg and MtBE analyzed using EPA Method 802018015 Modified <br /> Samples analyzed using EPA Method 82608 starting with 03/11/03 sample date <br /> Per SJCEHD letter dated July 28 2004 wells MW4 and MW-4A are sampled annually <br /> a=Deep zone well <br /> b=Laboratory results for the 11/04199 samples collected from the nested wells MW-t and MW-1A were switched The table shows corrected data <br /> c=Method Blank Contamination The method blank contains the targeted analyte at a reportable level <br /> d=Data Missing from Shavrs Historical Table <br /> e=Matrix Spike/Matnx Spike Duplicate Results for Benzene Toluene and MtBE were affected by the analyte concentration already present in the un-spiked sample <br /> f=Samples from MW 5 and MW 5A inadvertently sampled from the wrong well casing on 3111103 and 6127103 The sample reported as MW 5"was collected from MW SA and the sample reported as"MW 5A was <br /> collected from MW 5 <br /> Ig=Hydrocarbons from TPHg do not exhibit Gasoline chromatographic pattern for sample MW-5A <br /> 117 Elevenl7 11 StoreMl99761Tables119976 Current Groundwater xlsHistoncal Water Page 11 of 11 <br />