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I (Modified) and 8020. Portions of each samples were extruded into zip-lock plastic bags for field headspace measurement of volatile organic compounds with an HNu, photaionization detection meter. --, o for Wel! Co s uctia Monitor wall MW-1 was constructed through the 11 7/8-inch hollow stem augers using 4-inch inside diameter (;,D,), Schedule 40 PVC, D,02-inch slotted well screen from 12 feet to 34 feet and 4-inch I,D,. Schedule 40 urFIC well casing from 12 feet to approximately six inches below ground. surface As previously mentioned, the hottom seven feet of the monitor well MW-1 borehole was backfilled with _ _,ntonite pellets prior to well construction. Monitor wells-MW-2 through -10 were constructed through the 6 5/8-inch hollow stem augers using 2-inch I,D., Schedule 40, PVC 0.02- inch slotted well screen and 2-inch I.D. Schedule 40 PVC well casing, Monitor wells MW-2 through -10 were all over-drilled from 5 to 15 feet Past the bottom of the screened interval to provide lithologic information at depth. In each case, the over-drilled portions of the boreholes were backfilled with sodium bentonite pellets prior to well construction. Screened intervals acid borehole total depths for the monitor wells are as g follows: Screened Interval Total. Death MW- 1 12' - 34'. 411 MW- 2 12' - 341 41, MW- 3 12' - 34' 41' - 4 12' - 24.5' 301 MW- 5 12' - 26.5 40' MW- 6 12, - 28' 40' MW- 7 12' - 30' 40, M'd- 8 12' - 28, MW' 9 12' - 24' 40' _._. MW-10 12' - 25' 29' 30' The annular space between the borehole wall and well screen in each boring was filled from the bottom of the screen to 11 feet below ground surface with Clementina #3 filter sand. A bentonite pellet seal was installed in each well from 11 to 9 feet below ground surface, and a neat grout mixture of 94 pounds of Portland Type II cement and six gallons of clean, potable water was placed in each well from a depth of nine feet to ground surface. A PVC, slip cap was placed on the top of each well casing. Well heads consisted of water-tight, locking, traffic rated, monitor well vault boxes with a four inch wide cement pad to grade. Each monitor well was developed._immediately-after-the bentonite seal was- properly _ -- ---- nstalled-and properly hydrated. Monitor mw-1 developed with a five horsepower centrifugal pump wells M nitorhrough wells MW-9wand -10 are relatively low-yielding and were developed with a 11/2-inch x 3- foot, stainless steel bailer. Approximately 110-gallons of. water was 1I