Laserfiche WebLink
0111111111111 limiil � � W � � = = W W ow <br /> TABLE 1 GROUNDWATER MONITORING DATA, FORMER EXXON RS 7-3708 2705 COUNTR)i CLUB BOULEVARD STOCK l ON, CA <br /> Reference Depth to Groundwater Total i PH as O\ygeitate <br /> Monl.tormg Elevation Groundwater Elevation Benzeiw Toluene 1 th�lbenzene Xylenes gasoline MTPL Compounds <br /> Well Date (feet) (feet) (feet) (µg L) (uelL) (ug LI (u L) (µ�; L) (�i r L) (u«,L) <br /> a=Total volatile hydrocarbons <br /> i <br /> b=Result is an estimated value because it exceeds the linear range <br /> c=A typical chromatogram with unidentified peak(s)within the range of gasoline hychocarbons C hlUrinar�_d kndrocaibons a3 susr�� ted <br /> A groundwater sample collected from monitoring well MW6 on 4117192 contained chloiohcnzcnc and 1 2 dich1oro0cn1L11U <br /> d=A typical chromatogram Analysis of this sample by EPA Method 623 on 4 17/92(past I P%I LL091r17�,n(j66 holding unjL)%%as PD�WN L for t <br /> following chlorinated hydrocarbons vinylchloride cis 1 2 dichloroethene trichlorouhane and Mra�hioin�,chant I hL�L peaks ic.suh d in a po Itl% <br /> fuel hydrocarbon result <br /> e=Atypical chromatogram )'our unknown ptaks were observed causing a po,rtivL.Inll II\dnxaihon 1U,ull ( h Oiln4ICd h\dT0L irhlln,ars uispLLI�d <br /> f =A typical chromatogram An unknown peak was observed between MTBE and be nzcne Chlorinated h`drocarbons arc,suspc cte d <br /> g=A typical chromatogram Analysis of this sample by EPA Method 624 on April 17 1992(past LPA recoinmendcd holding tin e) %kas posun for the <br /> following chlorinated hydrocarbons chlorobenzene and 1,2-dichlorobenzene <br /> h=MTBE concentrations by EPA Method 8260 <br /> 1=Unidentified hydrocarbon in the C6-C 12 range <br /> = 1,2-Dichloroethane <br /> Reference elevation =Elevation relative to mean sea ie\,e1 <br /> Depth to groundwater =Measured from notch/mark on north edge of well casing <br /> ft bgs=Feet below ground surface <br /> µglL=Micrograms per liter <br /> TPH=Total petroleum hydrocarbons by EPA Method 8015 Modified <br /> MTBE=Methyl tertiary butyl ether by EPA Method 8020 Mod ified,except as noted <br /> Oxygenate compounds=sample analyzed for ethanol t butanol,MTBE di isopropyl eihcr ethyl%c tiary be t}I ether and t amyl methy I ether b� <br /> EPA Method 8260 All analytes were reported below the labOlatUR rlclLLUan limo evicepr as noa d <br /> LPH=Liquid-phase hydrocarbons <br /> NS=Not sampled <br /> NA=Not analyzed <br /> NM=Measurement not taken <br /> NC=Not calculated <br /> I <br /> flprojects\7370Mmaster\wplg50013708gw xls <br />