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Gettler-Ryan Inc Field Methods and Procedures <br /> November 21, 1996 <br /> Well Development and Samplin <br /> The purpose of well development is to improve hydraulic communication between the well <br /> and the surrounding aquifer Prior to development, each well is monitored for the <br /> presence of floating product and the depth-to-water is recorded Wells are then developed <br /> by alternately surging the well with a vented surge block, then purging the well with a <br /> pump or bailer to remove accumulated sediments and draw groundwater into the well <br /> Development continues until the groundwater parameters (temperature, pH, and <br /> conductivity) have stabilized After the wells have been developed, groundwater samples <br /> are collected Well development and sampling is performed by Gettler-Ryan Inc of <br /> Dublin, California <br /> Storing and Sampling of Drill Cuttings <br /> Drill cuttings are stockpiled on plastic sheeting or stored in drums depending on site <br /> conditions and regulatory requirements Stockpile samples are collected and analyzed on <br /> the basis of one composite sample per 100 cubic yards of soil Stockpile samples are <br /> composed of four discrete soil samples, each collected from an arbitrary location on the <br /> stockpile The four discrete samples are then composted in the laboratory prior to <br /> • analysis <br /> Each discrete stockpile sample is collected by removing the upper 3 to 6 inches of soil, and <br /> them driving the stainless steel or brass sample tube into the stockpiled material with a <br /> hand, mallet, or drive sampler The sample tubes are then covered on both ends with <br /> teflon sheeting or aluminum foil, capped, labeled, and placed in a cooler with blue ice for <br /> preservation A chain-of-custody form is initiated in the field and accompanies the selected <br /> soil samples to the analytical laboratory Stockpiled soils are covered with plastic sheeting <br /> after completion of sampling <br /> A-3 <br />