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Section 3 Surveying and Sampling <br /> Well Volume (WV)=water column heightft * 7crft2 * 7.48 gal/ft3, rft=radius of well in feet; <br /> Minimum Purge Volume=3*WV; <br /> Purging will continue until both three well volumes have been removed and the monitored field <br /> parameters pH,temperature, and conductivity'vary by less than 10%of the previous well volume <br /> recording. Data will be recorded on well-specific data sheets. It is possible that the well may <br /> run dry prior to purging three well volumes or before the field parameters pH,temperature, or <br /> conductivity have stabilized. If this occurs, samples will be collected as described below. <br /> 3.3.3 SAMPLE COLLECTION <br /> Groundwater samples will be collected at a mi imum of 48 hours or longer after the completion <br /> of well development activities and obtained i mediately following well purging, as described <br /> above in Section 3.3.2. In the event the well pumps or bails dry during purging,water levels will <br /> be allowed to recover for a maximum of 24 hours. Samples will then be collected directly from <br /> the well following recovery with no additional purging necessary. Collected water samples will <br /> be submitted to a California certified laboratory for analysis of constituents identified in the <br /> Regional Board's Draft Monitoring and Reporting Program (MRP)and according to appropriate <br /> analytical methods(Table 34). All samples required for metals analysis will first be filtered <br /> through a 0.45 micron filter prior to nitric acid preservation. <br /> March 2006 Lockeford CSD <br /> 3-2 Groundwater Monitoring Well Installation Workplan <br />