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30 March 2012 <br /> AGE-NC Project No. 97-0312 <br /> Page 5 of 8 <br /> EPA Method 8015M and Total petroleum hydrocarbons quantified as diesel(TPH-d) <br /> in accordance with TO17; <br /> • Benzene,toluene, ethylbenzene,and total xylenes(BTEX)and fuel additives methyl <br /> tertiary-butyl ether (MTBE), tertiary-butyl alcohol (TBA), di-isopropyl ether (DIPE), <br /> ethyl tertiary-butyl ether (ETBE), tertiary-amyl methyl ether (TAME), 1,2- <br /> dibromoethane (EDB), and 1,2-dichloroethane (1,2-DCA) in accordance with EPA <br /> Method 82608. <br /> 2.4. REPORT PREPARATION <br /> Results of the high vacuum soil vapor extraction installation and remediation will be <br /> presented in a completion of a Remedial Action Report. The Report will be in a format <br /> acceptable to the CRWQCB, and will be reviewed and signed by a California Professional <br /> Geologist. <br /> 3.0. FIELD PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of <br /> a California Professional Geologist. Procedures for well installations, well completion and <br /> survey, soil and ground water sampling, and ozone injection bench scale test procedures <br /> are described below. <br /> 3.1. DRILLING AND SOIL SAMPLING <br /> Pilot soil borings for collection of soil samples and installation of remediation wells will be <br /> advanced to depths of 30 feet and 45 feet bsg utilizing a truck-mounted, hollow-stem drill <br /> rig equipped with 10-inch diameter hollow-stem augers. Soil samples will be collected from <br /> selected borings, to update soil contaminate concentrations with contemporary data. Soil <br /> will be collected at five foot intervals, starting at approximately 5 feet bsg to the total depth <br /> of selected borings utilizing a California split-spoon sampler loaded with three 2-inch by 6- <br /> inch steel sleeves. To collect soil samples, the sampler will be driven by dropping a 140- <br /> pound hammer from a height of 30 inches. The number of blows required to advance the <br /> sampler in 6-inch increments will be recorded on the boring log. Soils encountered in the <br /> borings will be visually classified by an AGE geologist/staff member in accordance with the <br /> Unified Soil Classification System (USCS).Additionally, soil samples will be field screened <br /> for the presence of volatile organic compounds using an organic vapor meter equipped <br /> with a photo-ionization detector (PID) calibrated to an appropriate isobutylene standard. <br /> Advanced GeoEnvironmental,Inc. <br />