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.y .... ..... .vim. .. _ .. _ <br /> lers <br /> ! project name and location, the date and time, and the <br /> bags <br /> initials. Samples will then be placed in Zip-Lock- tYPe pa <br /> ,. sealed, and placed on ice in a cooler. Information notedann the label <br /> ! . will be recorded on a chain-of-custody form. <br /> mpletion of <br /> drilling, the samples will either be shipped or delivered to the <br /> E laboratory. <br /> Drill cuttings from each boring will be placed in DOT approved 55- <br /> gallon drums. After each drum is filled, it will be sealed, then <br /> labeled. <br /> 1 <br /> Q 4 Monitoring wells will be constructed using 2-inch diameter.e well screen wschedule <br /> F' 40 PVC flush-thread casing and screen. Thill have a <br /> =: nominal length of 5 feet and will have a slot size of 0.01 inch. The <br /> bottom of the screen will be closed with a schedule 40 PVC flush- <br /> a lockable <br /> w' threaded plug. The top of the well will be Capp All casing <br /> expandable plastic plug and covered with a slip cap. <br /> materials will be cleaned and decontaminated, prior to placement, by <br /> �.+ the use of steam. <br /> The annular space between the borehole wall and well screen will be <br /> �. backfilled with clean lone Star, or equivalent, 0130 mesh sand. The <br /> sand will be supplied to the job site in sealed paper sacks. The sand <br /> pacts will extend from the bottom of the boring to approximately 2 feet <br /> g above the top of the well screen. <br /> Above the sand pack., a nominal 2-foot layer of bentonite pellets will be <br /> placed. The pellets will be supplied to the job site in sealed plastic <br /> ' pails. <br /> The remainder of the boring will be backfilled with grout. out <br /> . The grout <br /> will consist of Type 1-II cement, well mixed with bentonite powder <br /> and sufficient water to create a fluid.ee ins pgace or poured.pth of <br /> space to be grouted, the grout may <br /> i <br /> The wells will be covered with a utility box set flush with the out to <br /> surface. The box will have a steel cover and will be set in gr <br /> # secure it in place. <br /> Both wells will be developed, then sampled. The development will <br /> consist of removing a minimum of three well volumes of water. <br /> Nater levels will be checked before and after development,aand PH <br /> purged water will be monitored for conductivity,er will be placed in <br /> and a visual estimate of clarity. The purged <br /> DOT-approved 55-gallon drums. After development, the drums will <br /> be sealed and labeled. <br /> ` 2r2 <br />