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California Regional Water Quality Control Board <br /> Central Valley Region <br /> Robert Schneider,Chair <br /> Terry Tamminen Fresno Branch Office Arnold Schwarzenegger <br /> Secretary for Internet Address: http://www.swrcb.ca.gov/—rwgcb5 Governor <br /> Environmental 1685 E Street,Fresno,California 93706 <br /> Protection Phone(559)445-5116•FAX(559)445-5910 <br /> 23 September 2004 <br /> M. Scott Mansholt <br /> ChevronTexaco <br /> Chevron Environmental Management Company <br /> P.O. Box 6012 <br /> San Ramon, CA' 94583 <br /> �VIU)T <br /> RELOCATION OF PROPOSED SOIL BORING—ADDITIONAL INVESTIGATION, 990 NO <br /> be <br /> BEECHNUT PROPERTY,TRACY, SAN JOAQUIN COUNTY <br /> We have reviewed a site map provided by e-mail on 21 September 2004, for the ChevronTexaco Old <br /> Valley Pipeline (OVP)project at the 990 Beechnut property in Tracy. Previously, in a 3 June 2004 <br /> memorandum, Regional Board staff approved a workplan prepared for ChevronTexaco by Geomatrix <br /> Consultants, Inc. (Geomatrix). Originally, four soil borings were proposed north-northwest of the site to <br /> evaluate and/or delineate the extent of impacted soil and groundwater downgradient of the site. <br /> The two proposed west boring locations were on private property but the property owner has denied <br /> access. Consequently, alternate drilling locations were needed to investigate the downgradient evaluation <br /> in the same general vicinity. <br /> Geomatrix staff recently completed a field reconnaissance in the residential neighborhood to locate <br /> possible sites where access might be feasible. As a result, one location, approximately 125 feet east- <br /> northeast of the two original drilling locations was identified and described on the 21 September 2004 <br /> e-mail field map. <br /> We concur with the proposed alternate location for the downgradient soil boring. Please notify Regional <br /> Board staff at least 48 hours prior to start of the field activities. <br /> If you have any questions or comments, please contact Dean Hubbard at (559) 445-5179. <br /> / <br /> )a. <br /> SHELT N R. G Y C. DEAN HUBBARD <br /> Senior Engineering Geologist ��JJ Engineering Geologist <br /> RG No. 6357 <br /> cc: Michael Infuma, Jr., San Joaquin County EHD, Stockton <br /> Gary Foote, Geomatrix, Oakland <br /> California Environmental Protection Agency <br /> �a Recycled Paper <br />