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A 'G -ll' 95(FRI) 1648 HOLT£ & ASSOC SACTO TEL:916 bol 9222 P. 003 <br /> r FkANLLA WINERY <br /> GkOT NDWATER WORKPLAN <br /> i <br /> i 4. The screened length of the new monitoring wells are not identified. Recommend <br /> q sufficient screen length to allow for measurement of high and low variations in <br /> ;l groundwater elevations. Also,the well screen openings should be sized to match the <br /> �j filter p;wk material and the filter pack materials should be sized based upon the results of <br /> a sieve analyses of the materiaL;to be screened acmas, Therefore.the liher pack and the <br /> screen size openings should be bused on the actual stratographic conditions. 'As-built' <br /> well construction details will need to be provided of the new monitoring wells. <br /> S. To aid in sampling and monitoring,4 inch well curings are recommendeJ in The new <br /> wells versus the 2 inch well savings propoud.(opdonal) <br /> 6. When constructing the new monitoring wells,a layer of bentonite pellets or.silica flour <br /> should be placed above the filter pack matorial and allowed to hydrate before a beatonfto <br /> slurry is injected into the annular space of the well. This intermediate step should help <br /> Prevent the filter pack and screen from getting plugged from the sluny, <br /> 7. The workplan does not discuss what well development proceciurna will be followrd npno <br /> Completion of the well construction. <br /> 8. All monitoriug wells must be surveyed by a licensed land surveyor or a regisrarPtl civil <br /> engineer authorized to peiform surveying. <br /> The G-oundwater Monitoring Workplan is conditionally approved,provided all the above <br /> comments and changes ai-e incorporated in the workplan and implemented during well installation. <br /> The information requested on as-builts and construction details can be submitted with tha first <br /> quarterly monitoring report. <br /> If you have any questions,please can meat(916)255-3030. <br /> {� MICHAEL fl. MOSBACHER, P.E. <br /> ( larujectEngillebr <br /> 1 <br /> cc: Mr. Lou Quaccia,The Wine Croup, TUpon <br /> j San Joaquin County Public Works Deparnnent,Stockton <br /> ti <br /> i <br />