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TABLE 3 Page 66 of 66 HISTORICAL GROUNDWATER DATA SHELL STOCKTON TERMINAL 3515 NAVY DRIVE,STOCKTON,CALIFORNIA MTBE MTBE Depth to GW SPH Well Date TPHd TPHg B T E X 8020 8260 TBA DIPS ETBE TAME Ethanol Methanol Lead TOC Water Elea. Thickness DO (PRV 482) lµ82) (182) (182) 4µ8/L) OWE) Owl) Wa) (µg2) (1X2) (182) (1y/L) (182) (my/L) (Jt MSL) (It TOC) ((t MSL) (A) (mg/L) DO-Dissolved oxygen µg/L=Micrograms per liter ft=Feet MSL= Mean sea level mg/L=Milligrams per liter <x=Not detected at reporting limit x —=Not analyzed or available ND=Not detected at m above quantitative limit n/n/n=Pre-purge,mid-purge,and post-purge DO readings. (D)=Duplicate sample EB=Equipment Blank FB=Field Blank TB=Trip Blank a=Depth to liquid/Liquid surface elevation. b=SPHs were present in well following purge. d=Chromatogram pattern indicated an unidentified hydrocarbon/Hydrocarbon does not match pattern of laboratory's standard. e=Samples broken in transit to laboratory. I=Well grab-sampled due to inoperable extraction pump that could not be removed from well. g=Analysis resulted in a value above the calibration range of the instrument,value is an estimate. I-TOC adjusted during wellhead maintenance. I=Hydrocarbon reported is in the early Diesel range and does not match the laboratory's Diesel standard. n=Analyzed out of holding time. p=The concentration reported reflect individual or discrete unidentified peak(s)not matching a typical fuel pattern r=Analyte was detected at a concentration below the reporting limit and above the laboratory method detection limit Reported value is estimated. u=The result was reported with a possible high bias due to the continuing calibration verification falling outside the acceptance criteria. z=Due to low levels of analyte found in the sample,the analyte was qualitatively identified based on the compound's retention time and the presence of a single mass ion. bb=Extractable hydrocarbons analyzed with Silica Gel cleanup ee=Analyzed by EPA Method 8015B(M). If=Analyte was present in the associated method blank. hh=The sample chromatographic pattern for TPH matches the chromatographic pattern of the specified standard but lighter hydrocarbons are also present(or were detected) it=Sample container contained headspace Wells MW-13,MW-29,and MW-30 surveyed by PIS Surveys,Inc. Information provided by Toxichem Management Systems,Inc. Site wells surveyed November 15,2000 by PIS Surveys,Inc. information provided by Toxichem Management Systems,Inc. Wells MW-11,MW-31,MW-32,and MW-33 surveyed by PIS Surveys,Inc. Information provided by Toxichem Management Systems,Inc. Site wells surveyed April-May of 2002 by URS. Fourth quarter 2004 survey data for wells MW-28,MW-34,MW-35,and MW-36 provided by REHEC Group,Inc. Wells MW-1 through MW-16,MW-18 through MW-36,and DW-2 resurveyed on November 30,2005 by Morrow Surveying. Wells MW-1,MW-16,MW-37,MW-38 and MW-39 resurveyed on July 11,2011 by Virgil Chavez Land Surveying Wells DW-2,MW-2 through MW-15,MW-18 through MW-23,MW-25,MW-26,and MW-28 through MW-26 resurveyed on October 20,2011 by Virgil Chavez Land Surveying ..rr,ag