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Lae' <br /> i I w_-_ _—irl- M _0 <br /> c <br /> KLEINFEtDER <br /> All three monitoring wells will be developed after installation. Each well will first sampled <br /> with a clear acry1h; bailer to visually inspect the sample for a product layer or sheer.. If no <br /> product layer or sheen is observed on the water samples, the wells will be developed with a <br /> surge-block,air•!ift tool, and/or bailer. Surging along the screened interval vE the well will <br /> draw the sedin:,nt from the formation into and out of the well and set the sand pack. The <br /> i sediment-laden water will be air-lifted from the well at a rate of approximately 0.50 gallons <br /> �J per minute (gpm). Each well will be developed until the discharge water runs relatively <br /> clear of fines. App,oximately 5 to 10 well volumes will be removed from each monitoring <br /> (' well. <br /> After the wells have been developed, the aquifer will be allowed to equilibrate. The wells <br /> will then be purged and sampled. During purging, field parameters (pH, conductivity, <br /> temperature) will be monitored. Samples will be collected after the field parameters have <br /> stabilized (normally requiring the removal of 3 to 5 well volumes). After collecting a <br /> sample, the sample bottles will be imm;c:=;,ely sealed, labeled, and placed in an iced <br /> cooler. At the end of the field da;; the water samples will be delivered under chain-of- <br /> custody to California Analytical Laboratories/Enseco in West Sacramento. <br /> To minimize cross-contamination, developing* and sampling equipment will be steam <br /> cleaned prior to use in each monitoring well. Water generated during well developing and <br /> purging will be contained in 55-gallon drums and stored on site pending results of water <br /> analyses. <br /> 3.5 MONITORING WELL ELEVATION SURVEY <br /> A ground water flow direction will be estimated from the three monitoring wells. The <br /> relative elevations of the top of the 24nch PVC casings will be surveyed for the three wells. <br /> The casing elevations will be tied into an assumed elevation, or a nearby county or USGS <br /> benchr,ark Depth to the static ground water table., will be measurcd for the top of each <br /> PVC casing. The depth to water will then be subtracted from the elevation of the top of <br /> the well casing to provide a water table elevation for each monitoring well location. The <br /> ground water flow direction will be estimated from the measured water table elevations. <br /> 1a52-QQ_,)Ina K <br />