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. 28 January 2005 AGE-NC Project No 02-0964 Page 4of7 3.0. FIELD PROCEDURES All field procedures will be overseen by an AGE representative under the supervision of a California Registered Geologist Procedures for the well installation,well development,sampling are described below 3 1 PILOT SOIL BORING Three pilot soil borings will be advanced at the site to a maximum depth of 40 feet bsg and near 100 feet bsg,utilizing a truck-mounted hollow-stem drill ng with 8 25-inch diameter hollow-stem augers to install groundwater monitoring wells Soil samples will be collected from each soil boring at five- foot intervals Relatively undisturbed soil samples will be collected in each of the borings using a California modified split-spoon sampler fitted with 2-inch diameter,6-inch long brass sleeves Upon removal from the sampler, the sample sleeves will be separated with a knife The exposed ends of the second sleeve will be covered with Teflon sheets, capped and sealed with tape Soils sampled in the borings will be visually classified by an AGE geologist in accordance with the Unified Soil Classification System(USCS) Additionally, soil samples will be field screened for the presence of volatile organic compounds using an organic vapor meter(OVM),equipped with a photo ionization detector (PID) Soil sample descriptions and OVM readings will be recorded on a log for each boring Following sample collection,each preserved sample sleeve will be labeled with the boring location, depth,time, date and sampler's initials Appropriately sealed and labeled samples will be placed in a chilled container under ice and transported under chain-of-custody procedure to a DHS-certified laboratory 3 2 WELL COMPLETION AND WELL ELEVATION SURVEY The 8 25-inch diameter pilot borings will be single-completed as a ground water monitoring wells utilizing 2-inch diameter schedule 40 polyvinylchloride (PVC) 0 020-inch slotted well screen and blank well casing A 20-foot length of well screen is anticipated for installation of the shallow monitoring well One pilot boring is proposed to be single-completed as a deeper ground water monitoring well utilizing 2-mch diameter schedule 40 polyvinylchlonde (PVC) 0 020-inch slotted well screen and blank well casing A minimal 5-foot length of well screen is anticipated for installation of the monitoring well Typically installation of short wells screens,well below the water table,can prove difficult and may require some additional filed time and unique drilling/installation techniques,not limited to no-sample drilling and the addition of clean water to wash out the hollow . stem augers of fine sediments Proposed monitoring well construction diagrams are depicted in Advanced CeoEnvirunmental,Inc