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23 April 1999 <br /> AGE-NC Project No. 95-0100 <br /> Page 4 of 7 <br /> 3.2.1. Soil Sample Collection and Analysis <br /> During the drilling of the proposed monitoring well'borings, soil samples will be collected at five- <br /> foot intervals from 40 feet bsg to the total depth of the borings. Field procedures for the collection. <br /> of soil samples in presented in Section 4.1. At least three soil sample from each monitoring well <br /> boring will be submitted for laboratory analysis. <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 monitoring well borings,two-inch diameter monitoring wells will be- <br /> installed in four of the borings. The ground water.monitoring wells will consist of 20 feet of well <br /> screen section. The well screen section"willbe.installed across the observed water table level 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 level.Based on ground water table level, it is anticipated that <br /> the total depth of the monitoring wells will be approximately 55 feet bsg. <br /> Following well installation, the wells will be developed in order to maximize water flow into the <br /> well and minimize the amount of fine-grained sediment drawn into the well during sampling <br /> activities. Field procedures for monitoring well installation and development are presented in <br /> Sections 4.3. and 4.3:, respectively. <br /> Additionally,groundwater monitoring well locations will be surveyed.following well installation. <br />