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W <br />• <br />9Betac,4ssociates <br />JUN � <br />Consultants in Waste Management, Environmental Control and tht ftbftW'cONLetH <br />FERMIT/SERVICES <br />May 28, 1987 <br />Project 116-1.7 <br />California Regional Water Quality Control Board <br />Central Valley Region <br />3443 Routier Road <br />Sacramento, California 95827-3098 <br />Attention: Mr. Timothy Crandall <br />Subject: SWAT Proposal (case no. 2209) <br />Forward, Inc. Landfill <br />San Joaquin County <br />Dear Mr. Crandall: <br />We have reviewed your comments, addressed to Greg Basso, regarding the <br />Solid Waste Assessment Test (SWAT) Proposal submitted for the Forward, <br />Inc. Landfill Site. The following responses correspond numerically to the <br />questions outlined in your letter dated March 5, 1987 (attached). <br />1. The soil samples intended for chemical analyses will be collected from <br />the vadose zone using a Modified California sampler. The inside of the <br />sampler is lined with brass cylinders, and driven into the soil through <br />the center of hollow stem augers. The soil samples are saved in the <br />brass liners, and sealed on each end with aluminum foil and plastic <br />caps. <br />All sampling and drilling equipment will be steam cleaned between <br />drillholes. If it becomes necessary to perform multiple sampling <br />drives in any drillhole, all sampling equipment will be thoroughly <br />cleaned by brushing with a solution of TSP and water between drives. <br />The Modified California Sampler is a split barrel sampler, and is <br />easily cleaned by this method. <br />The soil samples intended for hydraulic conductivity testing will be <br />collected using a Shelby Tube (thin-walled sampler). The Shelby Tube <br />is sealed on each end with aluminum foil and plastic caps after the <br />sample is collected. <br />2. The capped brass liners, containing the soil samples, will be <br />!1a <br />2068 Lincoln Avenue 0 San Jose, California 95125 • (408) 978-1514 <br />