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California Regional Water Quality Control Board <br /> Cen F�l Valley Region r� <br /> Winston H. Hickox Sacramento Main Office Gray Davis <br /> Secretaryfor L Internet Address: http://w .sweb.ca.gov/—mgcb5 Governor <br /> e A,Sacramento,California 95827-3003 <br /> Environmental 3443 Routier Road,Suit <br /> Protection Phone(9 16)255-3000•FAX(916)255-3015 <br /> 18 December 2000 <br /> Mr. Robert A. Ellgas, Ph.D <br /> IT Corporation <br /> 4005 Port Chicago Highway <br /> Concord, California 94520-1120 <br /> TECHNICAL JUSTIFICATION FOR USE OF PRESSURE GROUTING,DOMESTIC WELL <br /> DECOMMISSIONING AT 233 PARALLEL AVENUE, RIPON, CALIFORNIA <br /> We have reviewed the above referenced letter received on 7 December 2000. We concur with your <br /> technical justification for use of pressure grouting (only)to decommission the former domestic well at <br /> 233 Parallel Avenue in Ripon, California. Our concurrence with your technical justification does not <br /> constitute approval to proceed with this method of well decommissioning. As you are aware, approval <br /> to use pressure grouting without perforating the well casing must be provided by San Joaquin County <br /> Public Health Services. <br /> If you have any questions, please contact me at (916) 255-3233 (PierceM@rb5s.swrcb.ca.gov). <br /> Marcus L. Pierce R.G., C.Hg. <br /> Associate Engineering Geologist <br /> cc: <br /> Project File <br /> Binayak Archarya,Nestle USA, Inc. <br /> Margaret Lagorio, San Joaquin County PHS <br /> California Environmental Protection Agency <br />