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m �- <br /> -� '�-' <br /> t , <br /> I. H. KLEINFELDER &ASSOCIAFES <br /> minute (gpm). Each well was developed until the discharge water ran <br /> relatively clear and free of fines. Approximately 5 to 10 well volumes <br /> were removed from each monitoring well during development. This water was <br /> contained in 55-gallon steel drums and was stored on site. All equipment <br /> Iy� was steam cleaned prior to developing each well. Data collected during <br /> t : development are included in the Appendix. After the wells were developed, <br /> the formation was allowed to stabilize fer approximately ene week before <br /> F3i <br /> the initial sampling was conducted. <br /> VA The relative elevations of the top of the 2-inch PVC casings were surveyed <br /> b for the three monitoring wells. The casing elevations Were tied into a <br /> USGS benchmark. Depth to the static ground water table was maasured from <br /> t <br /> the top of each PVC casing. The depth to water was then subtracted from <br /> !y the elevation of the t.op of the well casing to obtain the water table <br /> 1.3 elevation at each monitoring well location. <br /> 4.2 GROUND WATER SAMPLING PROCEDURES . i <br /> The depth to the static water level was measured in each monitoring well <br /> before sampling. Each wel'- was then purged with a submersible pump. The <br /> jpH, conductivity and temperature of the ground water were monitored during <br /> purging, and one ' water sample was collected from each well after these <br /> 1,a three field parameters stabilized. Each sample bottle was immediately <br /> sealed, labeled and placed in an iced cooler. At the end of the day, the <br /> E� three water samples were delivered tu,der chain-of-custody to California <br /> 4 Analytical Laboratories, Inc. <br /> To reduce the potential for cross-contamination, all sampling equipment <br /> was ste rn .cleaned prior to use in each of the monitoring wells. <br /> !I! R Additionally, a trisodium phosphate solution and a clean water rinse were <br /> pumped through the sampling equipment prior to the collection of each <br /> a <br /> water sample. Water purged from the well prior to sampling and the' <br /> ' decontaminated water were contained in 55-gallon steel drums and stored on <br /> site. <br /> f. 1. <br /> p <br /> .o, <br /> 38-87-43 10 <br /> i <br />