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r� <br /> August 8, 1988 AGS Job No. 38053-1 <br /> Former Texaco Service Station, Manteca, California <br /> surface. This interval will allow sampling of the air/water <br /> interface representative of the formation during seasonal <br /> fluctuations of the ground-water level. <br /> The annular space in the well will be packed with sorted sand to <br /> a point approximately 2 feet above the slotted interval. A 1- to <br /> 2-foot-thick bentonite plug will be added above the sand as a <br /> seal against cement entering the sand pack. The remaining <br /> annulus will be backfilled with neat cement and bentonite powder <br /> to grade. <br /> _. <br /> The monitoring wells will be protected with cast-aluminum utility <br /> boxes equipped with PVC skirts. The boxes have watertight seals <br /> to protect against surfac -.-water infi- ration and require a <br /> specially designed wrench to open. This design discourages <br /> vandalism and reduces the possibility of accidental disturbance <br /> of the well. <br /> Ground-Water amp-lirg <br /> Water samples will be collected for subjective analysis prior to <br /> purging and development of the monitoring wells. A sample will <br /> be collected from the water surface in each well with a Teflon. <br /> ------ `�---- 'ective------- __ _..---------- <br /> bailer cleaned with Alconox and deionized water. Any subjective <br /> 12 <br /> �= APP11490' G90SYStOMS <br />