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31 August 2004 <br /> AGE-NC Project No 95-0141 <br /> Page 5 of 6 <br /> 4.0. FIELD PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of a California <br /> Registered Geologist Procedures for monitoring well drilling and soil sample collection,monitoring <br /> well installation, development and survey and equipment decontamination are outlined below <br /> 41 WELL DRILLING AND SOIL SAMPLE COLLECTION <br /> Groundwater monitoring well pilot borings will be advanced utilizing a truck-mounted,hollow stem <br /> drill ng utilizing 8 25-inch diameter hollow-stem augers Cuttings and nnseate generated during <br /> dulling will be containerized in properly labeled Department of Transportation(DOT)-approved 55- <br /> gallon drums,and stored on-site Disposal alternatives will be evaluated based on results of soil and <br /> water analysis <br /> Soil samples will be collected from each boring at five-foot intervals beginning at a depth of 5 feet <br /> bsg to total depths of the borings Soil samples will be collected utilizing a California split-spoon <br /> . sampler fitted with 2-inch diameter, 6-inch long brass sleeves The sampler will be driven by <br /> dropping a 140-pound weight from a height of 30 inches (blow counts) and record the number of <br /> blow counts on the boring logs Upon soil sample retrieval, the exposed ends of the second sleeve <br /> will be immediately covered with Teflon or aluminum sheets, sealed with plastic end caps, secured <br /> with tape and immediately placed in a chilled container for storage pending transportation to a state- <br /> certified laboratory Each sample sleeve will be labeled with the boring location, sampling depth, <br /> time, date and sampler's initials <br /> Sample duplicates will be monitored in the field for the presence of organic vapor using a photo- <br /> ionization detector (PID) equipped with an organic vapor meter (OVM) and will be visually <br /> described on boring logs using the Unified Soil Classification System (USCS) <br /> 42 WELL INSTALLATION <br /> Following completion ofmomtoring well and extraction well drilling,a 2-inch diameter Schedule 40 <br /> PVC 0 020-inch slotted well screen and casing will be installed Wells will be screened as follows <br /> • HU1 - A 20-foot length of well screen will be installed from 15 to 35 feet bsg The well <br /> section will be placed across the top of the saturated zone with a portion of the well screen <br /> section extending five feet above the water table <br /> . HU2 - A 5-foot length of well screen will be installed from 60 to 65 feet bsg <br /> Advanced GeoEnvironmental,Inc <br />