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Tattle I <br /> Groundwater Monitoring Data and Analytical Results <br /> Chevron Service Station n9-6171 <br /> 6633 Pacific Avenue <br /> Stockton,California <br /> EXPLANA I IONS <br /> Groundwater monitoring data and laboratort anahtical results prior to May 22 2000,were compiled from reports prepared by Blaine re(,h Scrvice,,,Inc <br /> TOC=Top of Casing, FPII-G= fotdl Petroluim Flvdro(-arbons as Gasoline TGG—Iota]Oil&Grease <br /> (fl)=feet B=Benzene (ppb)=Parts per billion <br /> GWE=Groundwater Elevation I = 1 oluene =Not Measured/Not Atiaiyzed <br /> F <br /> (msl)=Mean,,ea level E=Cthyltx nzene NP=No Purge <br /> S I =SLre,en Inks-vats X=Xylenes (R)=Re-analysis <br /> (ft bgs)=Feet Below Ground Sui face MTB1,=Methvl tertiary butyl ether QA=Quality A,,surance/Frip Blank <br /> DTW—Depth to Water LDB=Ethylene Dibromide <br /> 1 <br /> * TOC elevations were surveyed in Jul;of 2061,by Morrow Sui veying Elevations are based on San Joaquin County Benchmark 12 a brass disc marking <br /> LM monument,,tamped"IN-4 in monument box on the cast side of Pacific Avenue at the approximate centerline Benjamin Holt Drive,(Elevation= It 02) <br /> i 1 Chromatogram pattern indicates an unidentified hydrocarbon <br /> 2 i Chromatogram pattern indicates a gas and unidentified hydrocarbon <br /> ' Confirmation run <br /> l i ahoratory report indicates Bis-(2-1,thylhex)l)-Phthalate vva,,detected at 15 ppb and Butyl-Bentyl-Phthalate was detected at 9 9 ppb <br /> 5 G&,,ohne i ange concentration reported peaks are representative of tetrachloroethane and trace amount of gasoltne <br /> t I ahoratory report indicates discrete peaks <br /> 7 1 MTBE by EPA Method 8260 <br /> % MTBC by LPA Method 8260 was analyzed outside the EPA recommended holding time <br /> 9 Survey data unavailable <br /> 10 BTEX and MTBE by FPA Method 8260 <br /> iIr Laboratory report indicate,,(lie n-p)rted value for Toluene is,,uspeeted system contamination <br /> i' TOC has been altered unable to determine.GWF <br /> i'i Laborator) report indicates the obwrved sampled pattern is not typical at gasoline <br /> '4, Split sampled with Levine Fricke <br /> 15 No purge due to insufficient vaawr <br /> i <br /> f <br /> i� its/ii385121 � As of06 <br /> `` <br /> l♦ l♦ 1♦ 1♦ � � 1� ` 1♦ � � � tlll� � � � tttttt� 1� � <br />