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05 January 2009 AGE-NC Project No. 09-1664 Page 5 of 6 equipped with 1.25-inch probing rods.The Geoprobe advances soil probe borings using a hydraulic hammer to drive soil sampling tools to specified depths. Soil borings will be sampled at discreet five-foot intervals using a 1.125-inch Geoprobe soil sampling assembly loaded with four six-inch stainless steel sleeves. Upon sample retrieval, the ends of the second sleeve will be covered with Teflon sheets,capped and sealed with tape. Based on the amount of sample recovery,either of the leading sample sleeves will be preserved for possible laboratory analysis by covering the exposed ends of the sleeve with Teflon sheets and plastic end caps and sealed with tape. 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 will be transported under chain-of-custody procedure to a CDPH-certified laboratory. Soil encountered in the borings will be visually classified by an AGE personnel in accordance with the Unified Soil Classification System. Additionally, soil samples will be field-screened for the presence of volatile organic compounds using an organic vapor meter (OVM), equipped with photo-ionization detector(PID). 4.2. GRAB GROUND WATER SAMPLING PROCEDURES The soil boring will be advanced to the top of the ground water table,as identified by collection of a saturated soil sample, to collect a grab ground water sample. Once ground water has been encountered, a hydropunch-equivalent water sampling device will be driven two to three feet into the water-bearing zone.Ground water samples will be collected with a hydropunch-equivalent water sampling assembly fitted with one-inch diameter 0.010-inch slotted temporary well screen. Each ground water sample will be extracted by lowering a bailer through the hollow center of the drive rods and into the screen section.Depending on subsurface and drilling conditions,grab ground water samples may be collected directly through the geoprobe using a disposable tubing. Ground water samples will be collected into laboratory supplied containers.Ground water samples will analyzed for the constituents listed in Section 3.3. and collected into respective, laboratory- supplied, 40-m1 VOA vials and a 1-liter amber bottle, both without preservative. Following collection, the samples will be appropriately labeled, placed on ice, and kept in a cooler until delivered to the laboratory for analysis.Chain-of-custody protocols will be used to document sample custody transfer from the field to the analytical laboratory.A chain-of-custody form will accompany the samples. W. ,W GeOCOviren=806*1i