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• KLEINFELDER <br /> If conditions in the borehole allow, it is recommended that the sand pack be surged prior to <br /> installing the bentonite seal. <br /> If conditions allow in the borehole the sand pack will be surged to settle the pack prior to the <br /> installation of the bentonite seal in the new well in accordance with the SJC/EHD Well Standards <br /> 13.10.8 recommendation. <br /> If a slip cap is used on the bottom of the well casing, it must be secured with stainless steel <br /> screws. <br /> As detailed in the monitoring well construction diagram (Plate 3) included in the Kleinfelder <br /> workplan, the bottom cap is threaded onto the bottom of the screened section of the monitoring <br /> well. During the construction of the monitoring wells a slip cap is not included within the <br /> construction parameters, but if a slip cap is ever used it will be secured by stainless steel screws. <br /> The wellhead must be set in concrete to prevent damage to the wellhead and surface water <br /> infiltration. <br /> As detailed in the monitoring well installation workplan monitoring well construction diagram, <br /> the wellhead will be set in concrete to a depth of approximately 1-foot beneath the ground <br /> surface. <br /> At your direction, this addendum will be forwarded to RWQCB for approval. It is due to the <br /> RWQCB by no later than June 20, 2004. <br /> Please contact me if you have any questions. <br /> Respectfully submitted, <br /> KLEINFELDER, INC. <br /> eph les DRgi.G., REA I <br /> io eeologistSesntaffGoolost <br /> JZ:ss <br /> cc: Mr. Tim O'Brien <br /> Regional Water Quality Control Board <br /> 11020 Sun Center Drive <br /> Rancho Cordova, CA 95670 <br /> C20-4535-01.REP/ST04L325 Page 2 oft <br /> Copyright 2004,Kleinfelder,Inc. June 14,2004 <br />