Laserfiche WebLink
T*o . Sep�14 , 92 15 :24 No . 007 P .04 <br /> 5.0 <br /> ANALYTICAL RESULTS OF SAMPLING AND ANALYSES OF SELECTED <br /> OFFSITE PRIVATE WELLS AND OTHER ONSITE WELLS <br /> 5.0.1. Options 2, 3, and 4 were exercised to investigate the eastern edge of the TCE plume <br /> and to identify potential contamination in privately owned we�l��Psurrounding the b17RW- <br /> Tracy site. Table 5-1 lists the 22 wells that were sampled�ag pail of these Options. Figure <br /> 5-1 shows the well locations sampled under <br /> p Options 2, 3k ana 4. F'iguro 5-2 through 5-4 <br /> show detailed locations of the on-site wells sam led. Field activities, consisting of <br /> developing one well (LM 45), and purging and samt ng 22 wells were conducted from 27 <br /> April through 4 May 1992. Each of the 22 wells,sampled was analyzed for the analyses <br /> listed on Table 5.2. A t <br /> ppendix F contains summarytables for each of the analytical methods <br /> performed on the groundwater samples collected. Appe'rdix G contains the analytical data <br /> sheets associated with the wells sampled-es,.part of Options 2, 3, and 4 for the WMP. Quality <br /> r <br /> assurance quality control (QA/QC) review of,the analytical results was performed on the data <br /> submitted b the laboratory and is rovided'in-A <br /> Y rY p , pperidix G. <br /> 5.1 PURGING AND SAMPLING <br /> 5.1.1 Private Wells ' <br /> 5.1.1,1. Groundw�%'from each of the 13 privately owned wells was purged prior to <br /> sampling by opening the-;gigot closest to the well head, with the exception of well 5 (Raspo <br /> AG-3) which"wgs purged 'by allowing water to flow from a pipe connected to the well head. <br /> Periodically during�p trging, water quality parameters (pH, temperature, and specific <br /> conductance) were measured and recorded in the water sampling log books. Purging <br /> continued until water quality parameters stabilized. <br /> $.1.1.2. Groundwater samples were collected from the spigot closest to the well head, with <br /> one exception. Agricultural well 5 (Raspo AG-3) was sampled from the pipe connected to <br /> the well head opening. The water samples were poured directly into pre-cleaned, labeled <br /> sample bottles supplied by the analytical laboratory. Upon completion of sampling, water <br /> quality parameters were again measured and recorded in the sampling log book. All samples <br /> QNWJS40.ImDRW-DMN 5-1 <br /> MOt I DDjOBU <br />