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�s Y• FF`3' .4, A Jz: � 3:..1 J. � p� O # r5 <br /> I <br /> Mitigation Work Plan AGS 86102-2P <br /> Beacon station #3-492, Manteca, California May 26, 1997 <br /> The sample:, collected will be removed from the sampler and <br /> immediately sealed in their brass sleeves with aluminum foil, <br /> plastic caps and air-tight tape. They will then be labeled and <br /> placed in iced storage. A Chain-of-Custody form will be <br /> initiated by the sampler and accompany the samples to the <br /> analytical laboratory. <br /> s <br /> VADOSE WELL CONSTRUCTION <br /> } <br /> Vadose wells will be installed in the borings using thread-. <br /> Jointed two inch inner diameter schedule 40 PVC blank and slotted <br /> E . easing. No. chemical cements, glues, or solvents will be used in <br /> w(Ill construction. The screened portion of .the wells "will <br /> Consist of factor <br /> y-cut 0.020 inch slotted screen. The well <br /> . screen will extend downward from approximately 10:feet below the <br /> ground surfaoe to total depth in the well. Blank casing will <br /> extend from the top of the screened interval to the ground <br /> • surface. <br /> The annular space will be packed wit's graded sand to a point <br /> .......... ___..._. .. . .—fee' <br /> — <br /> f, approximately nine- -feet below the ground surface, or one foot <br /> above the slotted tnter,.ral. A twelve inch thick bentonite plug <br /> will he placed above the sans as a seal against cement entering <br /> o <br /> j <br />