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WATERWORK <br /> ceoa¢N.rn1•Gro>Eeriweni.EirnRonnlENinr <br /> N-v.mber 13, 1990 <br /> 'l ..meg ✓ <br /> ne, Darl..a Rause IIOV <br /> Sen.Toaquin Public Health services LNVIVtu""' <br /> Gavironmental Health Division p�Rh11Y lSF.fiJVi;GS <br /> P.O. .os 2009 <br /> Stockton, CA 95201 E <br /> He: Ground-uta, contamination impact report, Frannie E`h <br /> Wlnory, 1 00 Cast if'ghway 120, Ripon, CA <br /> Dear Ms, Reuse: <br /> A. .greed In Our nver.ation 1,September, WaterWork installed a <br /> single groundwater nonit-ring well at Fronde Winery to assess <br /> the potential of groundwater contamination. <br /> The well was installed on septemter 11, 1990, In the area of site <br /> where the highest hydr...lbon concentration were d.tected during <br /> s-ll a vats-n (Flour. 1), The well location Was <br /> ale- based <br /> uP,, <br /> local groundwater gradient conditions (Wat.rwork Snit <br /> Problem ASSGssment Report, .luly 13, 1990). <br /> An eight-inch diameter soil boring was drilled and completed as. <br /> two inch groundwater monitoring wall. All procedures and 1 <br /> protocol for groundwater m-nitoring Well conatrueti-n Genf-rmed I <br /> to WaterWork.Duality Assurance/Quality Control Plan presented in <br /> r duly 13, 1990 report, The well w GQ -d at a depth of <br /> 65 Zest below grade. We,11 e-mpletion Was based on the setting of j <br /> the w.11 screen 15 feet below and 5 feet above the saturated <br /> D rilli19 W s conducted ander a C57 license using a hollow <br /> at.. <br /> auger drill rig. - <br /> The sell was constructed of 2 inch diameter F480 threaded AVC <br /> screen/easing. No glues or s-lvente Wore used. sere..slot aine <br /> —o 0.010 inch. The sand pack mat.rlal used was #2 pro-washed <br /> silica sand. A tfoot bentonite seal w•s placed above the sand <br /> peek prior to growo uting With neat cement, Grout Was placed in the <br /> nulus .sing the tremmi- —thud. For well c.nstruction detail <br /> see Figure 2, - <br /> 171D bNSTREEI• ES LC CA951m• (Ma35-350) <br /> FPFSN0.CA(Pm)2P23e95 • RENO.NJ(A)�)�9968x1 <br /> �l <br />