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16 December 1999 <br /> AGE-NC Project No. 95-0184 <br /> Page 4 of 6 � TV <br /> various pumping rates. Data collected during the test will be used to evaluate groundwater <br /> remediation methods that may be applied at the site. <br /> 4.0. PROCEDURES <br /> All field activities will be overseen by an AGE representative under the supervision of a California <br /> Registered Geologist. Procedures for the soil sampling, well installation, equipment <br /> decontamination,performance of the pilot test and sample shipment are outlined below. <br /> 4.1. SOIL BORING ADVANCEMENT AND SAMPLING <br /> Soil borings will be advanced using hollow-stem auger drilling techniques. Soil samples will be <br /> collected in each boring using a California modified split-spoon sampler fitted with 2-inch diameter, <br /> 6-inch long brass sleeves. Upon removal from the sampler, the exposed ends of the second sleeve <br /> will be covered with Teflon sheets, capped and sealed with tape. Soils encountered in the borings <br /> will be visually classified by an AGE geologist in accordance with the Unified soil Classification <br /> System (USCS). Additionally, soil sample duplicates will be field screened for the presence of <br /> organic vapor using an organic vapor meter(OVM). <br /> Following sample collection, each preserved sample sleeve will be labeled with the boring location, <br /> depth,time and date. Appropriately sealed and labeled samples will be placed in a chilled container <br /> with ice and transported under chain-of-custody procedure to a DHS-certified laboratory for analysis. <br /> Selected samples will be analyzed for TPH-g, TPH-d, BTEX and MTBE in accordance with <br /> appropriate EPA methods. Several samples may also be analyzed from fuel oxygenates. Selection <br /> of samples for analyses will include input from the PHS-EHD. <br /> 4.2. MONITORING WELL INSTALLATION <br /> The monitoring well borings will be completed using hollow-stem auger drilling techniques. <br /> Following completion of drilling activities, a two-inch diameter Schedule 40 PVC, slotted well <br /> screen(0.020-inch) and well casing will be installed. <br /> The casing, filter pack and sealing materials will be placed into the borehole through the interior of <br /> the hollow-stem augers.After installing the well casing, filter pack material consisting of pre-washed <br /> #3 Lonestar sand will be added from the bottom of the borehole to approximately two feet above the <br /> screened interval. Following placement of the filter pack, the well will be surged to assist in settling <br /> the filter pack. Additional sand will be added if settling occurs. <br /> Advanced Geo Environmental,Inc. <br />