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California aRegional Water Quality Cool Board <br /> Central Valley Region <br /> Karl E.Longley,ScD,P.E.,Chair <br /> Linda Adams Sacramento Main Office Arnold <br /> SecremryJor 11020 Sun Center Drive#200,Rancho Cordova,California 95670-6114 Schwarzenegger <br /> Environmental Phone(916)464-3291 •FAX(916)4644645 Governor <br /> Protection htip://www.waterboards.ca.gov/centralvalley <br /> 14 May 2008 <br /> John Yarborough <br /> Delicato Family Vineyards <br /> 12001 South Highway 99 <br /> Manteca, CA 95336-9209 <br /> CONDITIONAL APPROVAL, GROUNDWATER MONITORING WORKPLAN, DELICATO <br /> VINEYARDS, MANTECA, SAN JOAQUIN COUNTY <br /> I have reviewed the 11 April 2008 Monitoring Well Installation Work Plan, prepared by <br /> Kennedy/Jenks Consultants. The work plan was prepared to characterize groundwater quality <br /> prior to submittal of a Report of Waste Discharge (RWD) as requested by staff in a 6 March <br /> 2008 meeting. The RWD will be submitted to update Delicato's Waste Discharge <br /> Requirements and add 90 acres of new land application area for wastewater application. I <br /> have the following comments: <br /> • Although proposed Well MW-4 is located at the upgradient edge of the 60-acre land <br /> application area, once wastewater application begins on the LAA, groundwater at the well <br /> will likely be impacted by the wastewater application. Therefore once land application of <br /> waste begins, Well MW4 will not be appropriate for determination of background <br /> groundwater quality. An additional monitoring well may be required. <br /> • No wells were proposed for the areas downgradient of the new land application areas. <br /> Please add a groundwater monitoring well downgradient of each of the new land <br /> application areas. <br /> Please submit a workplan addendum to address the items discussed above. You may submit <br /> the addendum consistent with your schedule, but allow 30-days for review prior to beginning <br /> work. If you have any questions on this conditional approval, please telephone me at <br /> (916) 464-4616. <br /> TIMOTH R. O'BRIEN <br /> Waste Discharge to Land Unit <br /> cc: Mike Huggins, San Joaquin County Environmental Health Department, Stockton <br /> Michael McLeod, P.G., Kennedy/Jenks Consultants, San Francisco <br /> California Environmental Protection Agency <br /> W lSulfbEnmTSan JmquinUdiom\Yeftm 6 Mal IIP,tlrc <br /> Q1 Recycled Paper <br />