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03/22/2800 17 36 2094671118 AGE STOCKTON PAGE 11 <br /> . <br /> 08 March 2004 <br /> AGE-NC Project No 96-0232 <br /> Page 7 of 11. <br /> • Between 10 and 20 feet west of ground water monitoring well MSV-1 to characterize <br /> lithology, potential contauiimnt migration pathways and to assess MTBE-impact <br /> immediately southwest of the former UST area, <br /> Between 10 and 20 feet east of the Rocky's Restaurant domestic drinking water well to <br /> characterize lithology, potential contaminant migration pathways and to assess MTBEs <br /> impact southwest of the former UST area near the impacted domestic well, <br /> • Between 40 and 50 feet north of ground water monitoring well MW-4 to characterize <br /> lithology,ground water gradient,potential contaminant migration pathways and to assess the <br /> vertical extent of MTBE-impacted ground water north of the former UST area, <br /> • Between 60 and 70 feet southeast of the domestic drinking water well at 14749 Thornton <br /> Road (Three B's Truck Plaza) to characterize lithology, potential contaminant migration <br /> pathways,to assess the vertical extent of MTBE-impacted ground water downgradient of the <br /> UST area, and <br /> • Between 150 and 200 feet southeast of ground«ater monitoring well MW-2 to serve as <br /> sentinel wells and screen for potential MTBE-impact to the municipal drinking water wells <br /> {Flag City No 1)located some 700 feet southeast of the Flag City Chevron site <br /> • Following installation, each well will be developed to maximize water flow into the well and <br /> minimize the amount of fine-grained sedunent drawn into the well during pumping or bailing <br /> Procedures for well installation and development are presented in.Sections 4 3 and 4 4,respectively <br /> 3 4 GROUND WATER SAMPLE COLLECTION AND ANALYSIS <br /> Ground water monitoring and sampling actiti ities for each neu ly installed ground water monitoring <br /> well will be conducted on a morithly basis until RWQCB notification or approval to do otherwise <br /> Ground water monitoring activities will include recording depth to ground water measurements and <br /> collection of ground water samples Ground water sample collection procedures are described in <br /> Section 4 5 <br /> Ground water samples w-xll be analyzed by a DHS-certified laboratory for the following constituents <br /> • TPH-g, BTEX, TBA, DIPE, ETBE and TA E, 'MTBE, EDB and 1,2-DCA, by EPA <br /> Method 8260B <br /> Laboratory reports for groundwater analyses,testing methods, laboratory quality assurance/quality <br /> control(QA/QC)reports, and sample chain of custody documentation will be presented in a report <br /> . Advanced GeoEnvironmental,Inc <br />