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California Regional Water Quality Control Board <br /> Central Valley Region <br /> Robert Schneider,Chair <br /> Winston H.Hickox _ Gray Davis <br /> Secretaryfor Sacramento Main Office Governor <br /> Environmental Intemet Address: http://www.swrcb.ca.gov/- wgcbS <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 21 March 2001 <br /> Mr. Robert Lawson <br /> Wild Rose Vineyards <br /> 1294 Colette Street <br /> Lodi, CA 95242 <br /> CONDITIONAL APPROVAL OF DRAFT GROUNDWATER MONITORING WORKPLAN, <br /> WILDROSE VINEYARDS, VICTOR, SAN JOAQUIN COUNTY <br /> I have reviewed the 9 January 2001 Draft Groundwater Monitoring Workplan, Wild Rose Vineyards, <br /> prepared by Kleinfelder. The plan was prepared in response to Provision F.2.b of Waste Discharge <br /> Requirements (WDRs) Order No. 5-00-182. <br /> After reviewing the workplan, I have the following comments: <br /> — Based on a south-southeastern groundwater flow direction, the well locations are generally <br /> acceptable,however, the placement of the monitoring well at the east side of the vineyards does not <br /> monitor a significant portion of the vineyards. Either add a fourth groundwater monitoring well or <br /> relocate the eastem-most well to allow more complete monitoring of the vineyard. <br /> — The well grout described on Plate 3 is not consistent with the Section 13.12.3 of the San Joaquin <br /> County Environmental Health Department's Well Standards which allows neat cement, <br /> cement/bentonite slurry, or bentonite clay. The use of bentonite clay would not be acceptable in this <br /> application because of the depth of the unsaturated zone and potential for bentonite to dry out and <br /> crack. <br /> — If conditions in the borehole allow, it is recommended that the sand pack be surged prior to installing <br /> the bentonite seal. <br /> — The following comments on the well construction methods are provided: <br /> — If a slip cap is used on the bottom of the well casing, it must be secured using stainless steel <br /> screws. <br /> — The wellheads must be set in concrete to prevent damage to the wellhead and surface water <br /> infiltration. <br /> California Environmental Protection Agency <br /> Q'*Recycled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.ca.gov/mgcb5 <br />