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ELL INSTAL-rATION AND DEVELOPMEr l PROCEDURES <br /> W <br /> BECK DEVELOPMENT <br /> Tracy, California <br /> Qths for the <br /> Monitoring Wells BD4 and BD5 will be d el core vrill be re ne ped in hfoot lenor ch LD* core <br /> barrel inside a 6-inch diameter auger. <br /> Samples will not be taken for <br /> purpose of geologic logging of the subsurface i.e.strodor, dyscoloraion) deem it necessary. <br /> analytical analysis unless field observations (i.e. odor, <br /> The only samples to be collected will be for the purpose of sieve analysis. The core itself <br /> will be discarded. <br /> engineered screen size and filter pack based on the results of the <br /> Both wells will have an env ger will remain in the ground until the sieve an has been <br /> will <br /> sieve analyses. The 6 inch auger <br /> bit, allowing enough room for a 4-inch thick <br /> completed and the order of the engineeredwell materials have arrived. Each boring <br /> ;hen be over drilled using a 12-inch diameter <br /> annulus between the casing and the bore hole wall. <br /> Well BD4 will contain 15 feet of screen from approximately the 3 to 23-foot interval below <br /> three <br /> rin <br /> around surface. This corresponds to the Besign of withines feetlof BD4. It will have 10 0 feethof <br /> site. Well BD5 will be positioned e zoelhorizontally <br /> screen placed in the first permeable zone lying 30 to 50 feet below the water table. <br /> Both wells will be constructed by installing flush threaded, 4-inch diameter schedule 40 <br /> engineered slot size screen, down through the hollow stem of the auger. <br /> PVC casing and envi laced by backfilling the annulus as the auger is being <br /> The engineered filter pack will be p <br /> retracted. The sand will be placed to extend one to two feet above the top of the screen. <br />