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GI olinclwaki Monttol tng Data and Analytical RLSUIUS <br /> To%co (Unocal) SLCVIL.L Stalion #15886 <br /> 2701 WLst M,tldl i_anc <br /> Stocktatl, Calllutrlia <br /> EXPLANATIONS, <br /> Groundwater monitoring data and Iibolaully III IlyuLI] ietiuliti pilot to MalLh 25 1998 %SLIt LompdLd Ilam ILpcxtti IIILpartd by MPDS SLIVILeb, Inc <br /> I <br /> TOC = Top of Casing elevation B = BUILLne ppb = Pa1ts per billion <br /> DTW = Depth to Water I = [oluL It, -- = Not MeasuredlNot Analyzed <br /> (ft) = Feet E = 1ahyIN-111Lnt ND = Not DetLLILd <br /> GWE = Groundwater Elevation X = XylLnt, <br /> msl = Relative to mean se.a level M I I;1: = Methyl ttinaly butyl LthLr <br /> TPH(D) = Total Petroleum Hydrocarbons as Diesel <br /> TPH(G) = Total Petroleum llydrotarbons as G,IS0lIIIL <br /> ' The TOC elevations wt ie surveytd relativc to Mean Sea LLvel (111sl) 111LSL WLII Lasnlg LlLvatioris wert used prior to thL May 2, 1997 monitoring event <br /> The TOC elevations of the WL1I c ISingS WLIe rtulrvLyLd (exLLpt for WLIN MW-2 and MW 1) rc.latIVL to nlsl on April 28 1997 The Well Lasing elevations are used <br /> beginning with the May 2, 1997 The new TOC Llevauons toi wLlls MW-2 and MW-3 NVUL Lalculated by using the previously surveyed <br /> elevations for wells MW-1, MW-2 and MW-3 (1V1W-I = -0 84 fust nisi MW 2=-0 30 JLLt 111sl and MW-3= -0 14 feet nisi) and file resurveyed <br /> elevation of well MW-I (=-1 35 tLLI. ni',f) <br /> Laboratory report indiLatLs untdtnufiLd hydl otarhom uiuArinl icd 11ydroL 11 hnm >C 14 <br /> - Laboratory rLpolt indlUtLti urlidLntiGLu1 hydI0LIIhons Lill lduttIliLd h)lhtlL,llholI, >( 15 <br /> 3 Laboratniy It-port ludlt.uLs unedLtuifiLd hydlMal hom diL,Ll Ind unlLlLlitlilld hydniLalbom >( 20 <br /> 4 Laboratory report indicafts the hydrocarbon-,dUi-cted did not appL It to hL dtLtiLt <br /> 5 Laboratory report indicates the hydrocarbons detected appealed to bL a dl0t-1 11011 LIIL',LI mixtuIL <br /> 6 TPH(D)analysts with sdlLa gLl cleanup <br /> 7 MTBE by EPA Method 8260 iii <br /> 8 Detection limit raised Refer to analyllLal results <br /> 9 Laboratory report indicates unidentiliLd hydioLarbnns C9 C24 <br /> iU Laboratory report Indicates unidentified hydiotalhow, C9 C24 and DlvLretL pLal a C21 <br /> Note Wells designated as S are scrLened In tllL bhalloW 7011L and WLlis (1LSlgilAttl J, I) IIL 'MLLMAI In [I1L di-Lp MILL <br /> 5886 x1s1#180137 5 As of 09/01/98 <br />