Laserfiche WebLink
California Agional Water Quality ontrol Board ; , '' <br /> Central Valley Region <br /> Winston H.Hickox Robert Schneider,Chair <br /> Secretary for Gray Davis <br /> Environmental Sacramento Main Office Governor <br /> Internet Address: http://www.swrcb.ca.gov/— gcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,Califomia 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 21 March 2001 <br /> Mr. Rick Enos <br /> Delicato Family Vineyards <br /> 12001 South Highway 99 <br /> Manteca, CA 95336-9209 <br /> CONDITIONAL APPROVAL OF GROUNDWATER MONITORING WORKPLAN, DELICATo <br /> VINEYARDS,MANTECA, SAN JOA QUINCOUNTY <br /> I have reviewed the 13 February 2001 Groundwater Monitoring Workplan, Delicato Vineyards, <br /> prepared by Kleinfelder. The plan was prepared in response to a 18 December 2000 request from the <br /> Regional Board to install and sample groundwater monitoring wells. After reviewing the workplan, I <br /> have the following comments: <br /> — Based on a north-northeast groundwater flow direction, the well locations are generally acceptable. <br /> However, the placement of the monitoring well at the southeast check does not monitor a significant <br /> portion of the application area. Please move the location of this well to a more central downgradient <br /> location. <br /> — The source of the information on the inferred groundwater flow direction is not described,but if the <br /> well placement doesn't allow evaluation of the upgradient and downgradient groundwater quality, <br /> additional wells may be required. <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 /> :fid 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 />