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ENVIRONMENTAL HEALT"EPARTMENT <br /> c a Donna K.Heran,R.E.H.S. SAN JOAQUIN COUNTYUnit Supervisors <br /> Director 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> _ Al Olsen,R.E.H.S. Stockton, California 95202-2708 Mike Huggins,R.E.H.S.,R.D.I. <br /> • Manager M <br /> Program Douglas W.Wilson,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. g La <br /> i=bag g Telephone: (209) 468-3420 Margaret orio,R.E.H.S. <br /> g <br /> Program Manager Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> FELE COPY Mark Barcellos,R.E.H.S. <br /> JOHN PESTANA Q-TIP TRUST MAY 2 4 2005 <br /> DONALD PETERSON <br /> PO BOX 672 <br /> MANTECA CA 95336 <br /> Re: Former Reeve's Exxon Site Code: 1397 <br /> 2360 East Street RO#: 200 <br /> Tracy, CA. 95376 SWRCB-CUF#: 3484 <br /> WORKPLAN: Additional Subsurface Investigation <br /> DATED: May 12, 2005 <br /> PREPARED BY: Ground Zero Analysis, Inc — John Lane, R.G. <br /> STATUS: APPROVED with conditions noted below. <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN [Health & <br /> Safety Code (H&S) Section 25296.10(c)(3)1.- <br /> • <br /> 5296.10E(• Install two (2) CPT type, dual hole, push-point, onsite soil borings to <br /> approximately 35-40 feet below ground surface (` bgs) for vertical <br /> soil and ground water investigation and, <br /> • Collect and analyze only two (2) soil samples from each boring. <br /> Based on field conditions and if "no evidence of contamination" is <br /> noted, then collect a soil sample from 15' bgs and 30' bgs and, <br /> • Collect one `grab-ground water' sample per hole "from an identified <br /> high-permeability zone between the depths of 25 and 40 feet bgs." <br /> and, <br /> • Submit "a technical report"to SJCEHD "similar to a Site Conceptual <br /> Model". <br /> COMMENTS AND CONDITIONS: <br /> SJCEHD concurs with the CPT approach included in the work plan and <br /> appreciates your consultant's intent to further define the lithology and <br /> contamination noted in the LIST and piping area. In order to ensure that <br /> adequate data is gathered in this mobilization, please have your consultant <br /> modify the work plan to include the following items. <br /> The "technical" report is to be in the format of a Site Conceptual <br /> Model as described in the attachment enclosed. <br />