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tbLc i <br /> • Groutldwater Mlonttt Dal.t .tnd! Analytical Results <br /> Tosco (Unmal) Service Station #5886 <br /> 2701 WLSI March 1-1111- <br /> Stockton, <br /> anLStockton, California <br /> I?Xl' ANATIONS. <br /> Groundwater monitoring data and Iabormory analytical results prior to Marsh 25, 1998, wire compiled front reports prLparLd by MPDS Services, Inc <br /> TOC = Top of Casing LILvatlun B = BU171.11L ppb = Parts pi.r b3lbon <br /> DTW = DLpIl1 10 WaILr 'I = To1uLItL -- = Not Measumd/Not Analyzed <br /> (ft ) = ]'I-et 1- = I-Illylkil/tAIL ND = Not DLILULd <br /> GWL = GrOIIItdWdtt,r 1JLvition X = XylulLs <br /> rnsr = Relative to mLan u.a ILVL1 M 113E = Willyl ILIllary butyl ulm <br /> TPH(D) = Tolal PLtrolLunt Hydrocarbons as DiLSLI <br /> TPI I(G) = Total PLtrolt um I lydroLlrhon% Is Gasolim <br /> ' The TOC Llcvatlorls werL survcyLd rLlatlVt,, to ML311 Sea LLVLI (.ns]) rhLSL w1,11 casing L1Lvattons werL usLd Prior to the May 2. 1997 monitoring event <br /> 'Che TOC elLvatiotls of the wL11 LasnlgS wLrL rLSurvLyLd (excLPt for w1.11s MW-2 and MW-3) relative to nlsl on April 28, 1997 The, well Lasing elevations are used <br /> beginning with OIL May 2, 1997 nIL new TOC elevations for wL115 MW-2 and MW-3 wLfC calculated by uSUIg ttlL prLvrously surveyed <br /> elevations for W01S MW-1 MW 2 and MW-3 (MW-1 = -0 84 fLt,t 110 MW-2--0 30 fLel nlsl, and MW 3= -0 14 ELI rn%l) and the resurveyLd <br /> elevation of wL11 MW-1 (=-1 35 fLu m-.1) <br /> I Laboratory report uldtLatLS unidLntifiLd hydrocarbons unldentlfiLd hydrocarbons >C 14 <br /> 2 Laboratory mpori Ind1LaILS u11111LnilfiLd hydrocarhonS unldentlliLd hydrocarbon~ >C15 <br /> 3 L-abllrmory rLport IIIdICatLS till ltlLIII IliLd hydrocarbons dILSLI and IltlldenlifiLd hydlnL.nbOns >C20 <br /> 4 Laboratory report uldicatLS the hydroLarbons dLtccted did riot appear to be diesLl <br /> S Laboratory report InJILALS 1111. hydroi-arllons dLtcued appeared 14 be a dILSC1 11011-dlLsel ntlxtul: <br /> 6 7 PL1(D) analysis with sihc-i gi-I ch-jimp <br /> 7 MTRE by LPA MLlhod 8260 <br /> a DuLuimi hent MISLd 1411-r to In 11)tiL 11 ILSIIIts <br /> 9 I_abormory ri-port InihL.ItL+ till i{ILnultLd llydroLaihons C9 C24 <br /> 10 <br /> Laboratory sport n1dlLatLS 1.1111du1111iLd hydrocarbons C9-C24 and Disci-LIC pLak OC24 <br /> Nott, WCHS dLS1gn tied as "5' 114 tiLILLnLd In 1111. Shallow zom, and wills dLSlgnalLd .IS 'D" arL SULL110 In 1111. dLLp Lon: <br /> 5886 xlsla180137 5 As of 12/03/98 <br />