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24 February 2009 <br /> AGE-NC Project No. 97-0343 <br /> Page 3 of 4 <br /> Laboratory reports for soil analyses, testing methods, laboratory quality assurance/quality control <br /> (QA/QC) reports, and sample chain of custody documentation will be presented in a report with <br /> fmdings and recommendations. Field procedures for advancement of probe borings and collection <br /> of soil samples are presented in Section 3.1. <br /> 3.0. FIELD PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of California <br /> Professional Geologist. Procedures for advancement of borings, soil sampling, equipment <br /> decontamination and sample shipment'are outlined below. <br /> 3.1. PROBE BORING ADVANCEMENT AND SAMPLING PROCEDURES <br /> I <br /> Probe borings will be advanced using a van-mounted Geoprobe 5400 direct-push probing unit <br /> equipped with 1.25 inch probing rods. The Geoprobe advances soil probe borings using a hydraulic <br /> hammer to drive soil sampling tools to specified depths. <br /> Soil borings will be sampled at discrete five-foot intervals using a 1.5-inch Geoprobe soil sampling <br /> assembly loaded with four six-inch stainless steel sleeves. Upon sample retrieval, the ends of the <br /> second or other selected sleeve will be covered with Teflon sheets, capped andsealed with tape. <br /> Appropriately sealed and labeled samples will be placed in a chilled container under ice and <br /> transported under chain of custody procedure to a CDPH-certified laboratory. Each sample sleeve <br /> will be labeled with boring designation, depth, time, date and sampler's initials. Soils encountered <br /> in the borings will be visually classified by an AGE scientist in accordance with the Unified Soil <br /> Classification System(USCS).Additionally, soil samples will be field-screened for thep resence of <br /> volatile organic compounds using an organic vapor meter(OVM), equipped with photo-ionization <br /> detector(PID). <br /> 3.2. EQUIPMENT DECONTAMINATION <br /> Prior to use,all sampling tools used for sample collection will be thoroughly rinsed with clean water <br /> after being washed with a solution of Alconox. All probing rods will be cleaned prior to <br /> advancement at each probe boring location. <br /> Advanced GeoEnvironrnental,Inc. f <br /> I <br />