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ENVIRONMENTAL HEALTH EPARTMENT <br /> UIN COUNTY <br /> + <br /> o. ' —'�•o SAN':�OA Unit Supervisors <br /> Donna R.Heran,R.E.H.S. Carl Borgman,R.E.H.S. <br /> Q:� f- > �• .a 304 East Weber Avenue, Third Floor <br /> Director Mike Huggins,R.E.H.S.,R.D.I. <br /> S Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> Program ManagerTelephone:;(209) 468-3420 Margaret Lagorio,R.E.H.S. I <br /> Ci�oR Laurie A.Cotulla,R.E.H.S. Fax: (209) 464_0138 Robert McClellon,R.E.H.S.. <br /> Program Manager — Mark Barcellos,R.E.H.S. <br /> i <br /> CONTACT: KEVIN MEEKS <br /> PAT & KATHLEEN MEEKS <br /> 25355 HWY 99 <br /> ACAMPO CA 95220 <br /> RE: PACIFIC AUTO CENTER SITE CODE: 508378 <br /> 25355 HWY 99 <br /> ACAMPO CA 95220 <br /> WORKPLAN: Cone Penetrometer TestinVn, and Monitoring Well Installation Work Plan r <br /> DATED: Tuly 15 2004 PREPARED BY: Advanced GeoEnvironmental Inc�AQF- <br /> APPROVED <br /> ❑ <br /> DISAPPROVED <br /> ❑ ADDENDUM .'Submit by : <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN (H&S I. <br /> 25296.10(c)(3).): <br /> 1. Installation of one pair of cone penetrometer borings (one for CPT sounding, the l <br /> other for grab groundwater sample collection) to 150 feet bsg. <br /> 2. installation of two additional monitoring wells 1�,ff4 and MW5 to about 90 feet bsg <br /> to define the extent of the contamination plume and to provide''down-gradient <br /> sentinel monitoring points between the site and off site private receptor wells. <br /> 3. Samples will be submitted to laboratory for analyses of TPH-G"BTEY, the five fuel <br /> oxygenates and 1,2-DCA and EDB., <br /> COMMENTS AND CONDITIONS: . <br /> 1. Contingency to install additional monitoring wells, and to modify screen sections and <br /> location of the wells based on geological information and sampling results of the <br /> CPT borings. <br /> 2. Implement the proposed work by September 23, 2004. <br /> REASONS FOR DISAPPROVAL OF THE WORKPLAN (H&S 25296.10(C)(3).): <br /> None if conditions are met. <br /> DATED Au st 12 2004 BY - <br /> �f, <br /> E Cc: CRWQCB, Central Valley Region—James L. L. Barton,RG <br /> Robert Marty <br /> Cc: Advanced GeoEnvironmental, Inc. <br /> :M <br /> t <br />