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02 April 2013 <br /> AGE-NC Project No. 95-0130 <br /> Page 6 of 9 <br /> • Benzene,toluene, ethylbenzene and total xylene (BTEX), methyl tertiary butyl ether <br /> (MTBE), tert-butanol alcohol (TBA), di-isopropyl ether (DIPE), ethyl tert butyl ether <br /> (ETBE),tert-amyl methyl ether(TAME), 1,2-dichloroethane(1,2-DCA)and ethylene <br /> dibromide (EDB) by EPA Method 8260 or full list of chemicals from EPA Method <br /> 624. <br /> 3.4. INFLUENT MONITORING RESULTS <br /> Monthly groundwater GWET system influent sampling was performed on 22 October, <br /> 26 November and 18 December 2012 for laboratory analysis of contaminants listed in <br /> Section 2.3. <br /> During all three monthly monitoring events TPH-g were detected in influent water samples <br /> at concentrations as high as 50,000 pg/I. Additionally, TPH-g was detected from the <br /> October GAC-1 sample at a concentration of 120 pg/I. <br /> BTEX constituents were detected from the influentwater samples collected during all three <br /> monitoring events at concentrations as high as 3,000 pg/I benzene, 3,900 pg/I toluene, <br /> 1,500 pg/I ethylbenzene and 7,500 pg/I xylenes. <br /> MTBE was detected in all three influent samples at concentrations as high as 43 pg/I;while <br /> TAME was detected in all three influent samples at concentrations as high as of 14 pg/I. <br /> No other constituents of concern were reported in intermediate samples collected during <br /> the 41h Quarter 2012 sampling events. <br /> Analytical results of GWET remediation watersamples(CTEL Laboratory I.D. Nos. CT214- <br /> 1210108, 1211139 and 1212109) are summarized in Table 2; laboratory reports are <br /> included in Appendix C; GeoTracker confirmation numbers 2025948703, 1722690641 and <br /> 2423893034 confirm the upload of the submitted laboratory electronic deliverable format <br /> (EDF) files. <br /> 3.5. EFFLUENT MONITORING RESULTS <br /> In accordance with the requirements of City of Stockton Department of Municipal Utilities- <br /> Ground Water Discharge Permit, monthly groundwater GWET system effluent sampling <br /> was performed on 22 October, 26 November and 18 December 2012 for laboratory <br /> analysis of contaminants listed in Section 3.3. <br /> Advanced GeoEnvironmental,Inc. / <br />