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20 December 2000 <br /> AGE-NC Project No. 95-0100 <br /> Page 4 of 8 <br /> Selected soil samples will. be analyzed by a California Department of Health Services (DHS)- <br /> certified laboratory for the following constituents: <br /> • TPH-g by EPA Method 8015 Modified; <br /> • Benzene, toluene, ethylbenzene, and total xylenes (BTEX) by EPA Method 8020; and <br /> • Fuel oxygenates including methyl tertiary-butyl ether(MTBE), tertiary-butyl alcohol (TBA), <br /> di-isopropyl ether(DIPE), ethyl tertiary-butyl ether (ETBE) and tertiary-amyl methyl ether <br /> (TAME) by EPA Method 8260 Modified. <br /> Laboratory reports for soil analyses, testing methods, laboratory quality assurance/quality control <br /> (QA/QC) reports, and sample chain of custody documentation will be presented in a report with <br /> findings and recommendations. <br /> 3.2.2. Monitoring Well Installation and Development <br /> Following completion of the soil pilot borings, four shallow soil borings will be completed as two- <br /> inch diameter monitoring wells. The ground water monitoring wells will consist of 20 feet of well <br /> screen section. The well screen section will be installed across the observed water table with <br /> approximately five-feet of screen section extending above the water level and 15 feet of screen <br /> section extending below the water table (40 to 60 feet bsg). Based on current ground water table <br /> level, it is anticipated that the total depth of the monitoring wells will be approximately 60 feet bsg. <br /> For the completion of the depth-discrete monitoring well borings, three deep soil pilot borings will <br /> be completed as two-inch diameter monitoring wells. The ground water monitoring wells will consist <br /> of 5 feet of well screen section. The well screen section will be installed well below the observed <br /> water table level (80 to 85 feet bsg). Based on current ground water table levels, it is anticipated that <br /> the total depth of the monitoring wells will be approximately 85 feet bsg. <br /> Following well installation, the wells will be developed to maximize water flow into the well and <br /> minimize the amount of fine-grained sediment drawn into the well during sampling activities. Field <br /> procedures for monitoring well installation and development are presented in Sections 4.1. and 4.2., <br /> respectively. <br /> Additionally, ground water monitoring well top elevations and locations will be surveyed following <br /> well installation. <br />