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k19 KLEINFELDER <br /> An employee owned company <br /> File No. C20-4535-01.REP <br /> June 14, 2004 <br /> Mr. Rick Enos <br /> Delicato Vineyards <br /> 12001 South Highway 99 <br /> Manteca, California 95376 <br /> Via Facsimile 209.824.3554 and U.S. Mail <br /> RE: ADDENDUM LETTER, <br /> GROUNDWATER MONITORING WORKPLAN <br /> DELICATO FAMILY VINEYARDS <br /> MANTECA, CALIFORNIA <br /> Dear Mr. Enos, <br /> This addendum to the original letter prepared for the destruction/abandonment and replacement <br /> of monitoring well MW-2 (Kleinfelder document 20-4535-O1.REP/STO4L311 dated June 3, <br /> 2004) is in response to the comments from the State of California Regional Water Quality <br /> Control Board (RWQCB) and their requirement to address those comments by June 20, 2002 <br /> prior to commencing any work. The italicized comments made by the RWQCB are as re-stated <br /> below followed by a response. <br /> The well must be surveyed to establish the casing elevation for groundwater measurement <br /> calculations. <br /> As discussed in Kleinfelder's original groundwater monitoring workplan, the tops of the <br /> monitoring wells shall be surveyed so that the depth to groundwater measurements can be <br /> converted to groundwater elevations used to calculate groundwater gradient. The well shall be <br /> surveyed relative to a local benchmark consistent with the previously used benchmark for the <br /> original well and other monitoring wells on site. <br /> The well grout shall be consistent with the Section 13.12.3 of the San Joaquin County <br /> Environmental Health Department's Well Standards that allows neat cement, cement/bentonite <br /> slurry, or bentonite clay. The use of bentonite clay would not be acceptable in this application <br /> because of the depth of the unsaturated zone and potential for bentonite to dry out and crack. <br /> The well grout shall be consistent with Section 13.12.3 of the San Joaquin County <br /> Environmental Health Departments Well Standards using a cement based grout material. <br /> C204535-01.REP/ST04L325 Page I of 2 <br /> Copyright 2004,Kleinfelder,Inc. June 14,2004 <br /> KLEINFELDER 2825 East Myrtle Street, Stockton,CA 95205-4794 (209)948-1345 (209)948-0621 fax <br />