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22 September 2009 <br /> AGE-NC Project No. 09-1692 <br /> Page 6 of 11 <br /> • Benzene, toluene, ethyl benzene and total xylene (BTEX) in accordance with EPA <br /> Method 8260. <br /> Laboratory reports of both soil and ground water analyses, testing methods, laboratory QA/QC <br /> reports, and sample chain of custody documentation will be presented in a report. <br /> 3.4. GRAB GROUND WATER SAMPLE COLLECTION AND ANALYSIS <br /> A grab ground water sample will be collected from `deep' soil probe borings during the boring <br /> process using a Geoprobe water sampling assembly. Samples will be collected into 40-m1 volatile <br /> organic analysis(VOA)vials and 1-liter amber bottles as appropriate for the required analyses,both <br /> without preservative;grab ground water sample collection procedures are presented in Section 4.3. <br /> Grab ground water samples will be analyzed by a CDPH-certified laboratory for the constituents <br /> listed in Section 3.3. <br /> 3.5. MONITORING WELL INSTALLATION, DEVELOPMENT AND SURVEY <br /> Following advancement, selected pilot borings will be completed as single-level ground water <br /> monitoring wells. After installation, the wells will be developed to maximize water flow and <br /> minimize the amount of fine-grained sediment drawn into the well during pumping or bailing, and <br /> the location and well-head elevation of each well will be surveyed by a State of California licensed <br /> surveyor.Procedures for well installation,development,and survey are presented in Sections 5.3 and <br /> 5.4, respectively. <br /> 3.6. QUARTERLY GROUND WATER SAMPLING AND ANALYSIS <br /> Following installation of wells,monitoring and sampling will be conducted at all monitoring wells <br /> on a quarterly basis. After several quarters of monitoring, the frequency may be modified, as site <br /> conditions permit.Monitoring activities will include recording depth to ground water measurements <br /> and collection of ground water samples for laboratory analysis by a CDPH-certified laboratory for <br /> the analytes noted in Section 3.3.Ground water sample collection protocols are described in Section <br /> 5.5. <br /> Laboratory reports for ground water analyses, testing methods, laboratory QA/QC reports, and <br /> sample chain of custody documentation will be presented in quarterly reports with findings and <br /> recommendations. <br /> Advanced GeoEnviromnental,Inc. <br />