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02/10/2005 10:35 FAX 209 9480621 0 003 <br /> kKLEINFEL. DER <br /> An emplOye'e owned eomPanV <br /> File No. 34091.E01 <br /> February 9, 2005 <br /> Mr. Dave Olmstead <br /> Linne Estates,LLC <br /> 7701 Bates Road <br /> Tracy, California Q5?c5 <br /> RE: ADDENDUM LETTER, <br /> CONDITIONAL APPROVAL <br /> ADDITIONAL, MONITORING WELL INSTALLATION <br /> LINNE ESTATES SUBDIVISION <br /> TRACY, SAN JOAQUIN COUNTY <br /> Dear Mr_ Olmstead: <br /> This letter is an addendum to Kleinfelder's workplan (Kleinfelder document <br /> 34091_E01/ST05R040 date January 13, 2005) prepared for the replacement of MW-4. This <br /> addendum si-i=arizes Kleinfelder's response to review comments from the State of California <br /> Regional Water Quality Control Board (RWQCB) and their requirement to address those <br /> comments prior to commencing work. The italicized comments made by the RWQCB are as re- <br /> stated below followed by a response. <br /> The proposed location of Well MW-4r and the close proximity to the 0.7-acre stormwater pond <br /> may result in groundwater samples that are not representative of groundwater below the land <br /> application areas due to dilution with stormwater. It may be more appropriate to locate the well <br /> closer to Zone 5. Please reconsider the proposed location of Well MW-4r. <br /> lar accordance with the recommendation of the RWQCB, the proposed location of MW-4r has <br /> been re-located to the area north of Zone 5. Please see the revised Plate 2 of the original <br /> workplan. <br /> The well location casing elevation must be surveyed to allow use of the well for groundwater- <br /> elevation map preparation. All wells shall be surveyed to the same reference point to allow <br /> elevation of the groundwater elevations acid flow directions. <br /> All of the wells at the facility will be surveyed to the same reference point in order to allow the <br /> use of the monitoring wells for evaluation of groundwater elevations and flow directions. <br /> If conditions in the borehole allow, it is recommended that the sand pack be surged prior to <br /> installing the bentonite seal. <br /> 34091101/STWLU55 Page 1 oft <br /> «)2005,Kleidelder,hic. FAA uuy 9,2005 <br /> KLEINFELUER 2825 East Nlyrde Saeel,Siucklon,CA 95205-4794 (209)948-1345 (209) 948.0621 lax <br />