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-------------------- <br /> FIELD PROCEDURES <br /> FOR <br /> { GROUNDWATER MONITORING DEVELOPMENT AND SAMPLING <br /> ! <br /> Groundwater Monitoring Well Development <br /> The groundwater monitoring wells were developed to consolidate and stabilize the filter pack <br /> to optimize well production and reduce the turbidity of subsequent groundwater samples. <br /> Well development was accomplished by using a disposable bailer to evacuate the water and <br /> f=<.> sediments before establishing the bentonite seal during well construction. Development <br /> continued until the groundwater was relatively free of sediment. Well development fluids <br /> != were placed into properly-labeled Department of Transportation approved drums for <br /> disposal. <br /> { Groundwater Level Measurement <br /> Before groundwater sampling activities, the groundwater level in each well was measured <br /> from the permanent survey reference point on top of the well casing. Groundwater in each <br /> -` well was monitored for free-floating product or sheen. The depth to groundwater was <br /> measured to an accuracy of 0.01 foot from the top of the polyvinyl chloride well casing using <br /> =. an electronic sounder. <br /> Groundwater Monitoring Well Sam lin <br /> To ensure that the groundwater sample was representative of the aquifer, the wells were <br /> purged of 3 casing volumes and the above parameters stabilized before sample collection. <br /> Purging was accomplished using a pump. <br /> The groundwater samples were collected using a disposable bailer, and carefully transferred <br /> into appropriate clean, glass, laboratory-supplied containers. The sampling technician wore <br /> nitrile gloves at all times during purging and well sampling. The samples were clearly <br /> labeled with well number, site identification, date and time of collection, and sampler's <br /> initials, and transported in an iced cooler to a state-certified laboratory following proper <br /> F_ preservation and chain of custody protocol. <br /> f=.f <br />