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09/18/2000 17 08 20946710 AGE STOCKTON � PAGE 05/05 <br /> 28 August 2000 <br /> AGE-NC Protect No 97-0249 <br /> Page 7of10 <br /> will be pushed into the specified zone, then withdrawn approximately three feet to expose an inlet <br /> screen The interior of the sampling tool fills with water and a 1-inch outer diameter(O D)stainless <br /> steel bailer will be lowered and utilized to extract a ground water sample Grab ground water samples <br /> will be collected in intervals of porous and permeable material All ranseate generated during drilling <br /> activities will be, containerized in properly labeled DOT-approved 55-gallon drums, and was stored <br /> ori-site in an area lacking public access All soil borings were backfilled over their entire depth with <br /> a portland.cement grout mux <br /> Following sample collection, the samples will be placed in laboratory-supplied containers and <br /> transported under chain-of-custody to a DHS-certified laboratory <br /> Proposed soil boring locations are illustrated on Figure 2 Following borehole advancement,portland <br /> cement(grout max)will be utilized to backfill each borehole utilizing a tremae pipe The PHS-EHD <br /> will be given the opportunity to inspect the grout mix prior to backfilling activities <br /> 4 2 MONITORING WELL DRILLING <br /> • Soil bonaxgs will be advanced utilizing a truck.-mou[ited, hollow-stem drill ng and 8-inch diameter <br /> hollow-sten.augers Cuttings generated during dnlhng activities will be placed on plastic sheeting <br /> and covered Rimeate will be contamenzed in properly labeled D O T approved 55-gallon drums, <br /> and stored on-site in an area lacking public access Disposal alternatives will be evaluated based on <br /> results of soil and water analysis <br /> 4 3 SOIL SAMPLING <br /> Soil samples will be collected at five-foot intervals, beginning at a depth of 5 feet bsg, utilizing a <br /> modified California split-spoon sampler and brass sleeves The sampler will be driven by dropping <br /> a 140-pound weight from a height of 30 inches (blow counts) The blow counts will be recorded on <br /> boring logs Upon soul sample retrieval, the middle brass sleeve will be removed from the sampler <br /> The ends of the brass sleeve will be immediately covered with Teflon or aluminum sheets, sealed <br /> with plastic end caps, secured with tape and immediately placed in a chilled container for <br /> transportation under chain of custody to a state-certified laboratory Each sample sleeve will be <br /> labeled with the boring 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 Thearnrao 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 /> i <br /> Advanced GeoEnvirenmental,Inc <br />