Laserfiche WebLink
31 July 2000 . <br /> AGE-NC Project No. 98-0468 <br /> Page 8of11 <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 the soil sampling, in-situ ground water sampling, equipment <br /> decontamination and sample shipment are outlined below. <br /> 4.1. 'DRILLING <br /> Soil borings will be advanced utilizing a truck-mounted, hollow-stem drill rig and 8-inch diameter <br /> hollow-stem augers. Cuttings generated during drilling activities will be placed on plastic sheeting <br /> and covered. Rinseate will be containerized in,properly labeled D.O.T. approved 55-gallon drums, <br /> and stored on-site in an area lacking public access. Disposal'altematives will be evaluated based on <br /> results of soil and water analysis. <br /> 4.2. SOIL SAMPLING - <br /> • Soil samples will be collected at five-foot intervals, beginning at a depth of 5 feet bsg, utilizing a <br /> California split-spoon sampler and brass sleeves. The sampler will be driven by dropping a 140- <br /> pound weight from a height of 30 inches (blow counts). The blow'counts.will be recorded on boring <br /> logs. Upon soil sample retrieval,the middle brass sleeve will be removed from the sampler.The ends <br /> of the brass sleeve will be immediately covered with Teflon or aluminum sheets, sealed with plastic <br /> end caps, secured with tape and immediately placed in a chilled container for transportation under <br /> chain of custody to a state-certified laboratory. Each sample sleeve will be labeled with the boring <br /> location, sample depth, sample time, sampling date and sampler's initials. <br /> During sampling activities, sample duplicates will be monitored for the presence of organic vapor <br /> using a photo-ionization detector (PID: Thermo Environmental 580A, 10.0 eV, calibrated to <br /> isobutylene) and will be visually described on boring logs using the Unified Soil Classification <br /> System(USCS). <br /> All sampling tools and brass sleeves used for sample collection will be thoroughly rinsed with clean <br /> water after washing with a solution of Alconox.All hollow stem augers will be steam-cleaned prior <br /> to advancement of each borehole. <br /> i <br /> Advanced GeoEnvironmental,Inc. <br />