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1 <br /> DIETZ ENGINEERING AND CONSTRUCTION, INC. <br /> Serving Commercial and Industrial Clients <br /> CA E ic.#538281 <br /> San Joaquin County Environmental Health Department Date:June 14,2013 <br /> 1868 East Hazelton Avenue <br /> Stockton,CA 95205-6232 <br /> 3 ' 6-T. <br /> Attn.: Mr.Nuel Henderson, PG <br /> Your Reference: Site Code 1392 <br /> Subject: Addendum to Well Closure Report- Former Fueling Station,7500 West Eleventh <br /> Street,Tracy,California. <br /> Dear Mr. Henderson: <br /> As you requested we have prepared this addendum to our Well Closure Report-Former Fueling <br /> Station, 7500 West Eleventh Street, Tracy, California of May 2013 <br /> The Well Closure Report documented the destruction of 27 groundwater-quality monitoring well <br /> at the Navarra Site at 7500 West Eleventh Street in Tracy California under the permit and field <br /> oversight of The San Joaquin County Environmental Health Department. The California State <br /> Water Resources Control Board (SWRCH) has established the following Global ID code for the <br /> site under its Geographic Environmental Information Management System: 70607700606. <br /> As noted in the Well Closure Report, the method used to destroy the monitoring wells that was <br /> approved by the SJCEHD's field representative generally did not generate any waste material <br /> other than casings. well-head boxes and bituminous macadam and concrete surfacing debris. <br /> However in the case of three wells, i.e. Monitoring Wells MW-1, MW-12 and MW-313, due to <br /> failure of the casing while it was being extracted, it was necessary to drill out a portion of the <br /> material in the annular space between the casing and the walls of the boring drilled to install the <br /> well. That material included Portland cement grout, Bentonite seal material and filter sand. No <br /> contaminated soil was extracted from the subsurface. Paving, concrete, plastic, and other debris <br /> including annular space material was initially stockpiled on a sheet of industrial plastic before <br /> being transferred to a debris bin. The bin and its contents, which amounted to 3.83 tons, were <br /> transported to Tracy-Delta Solid Waste Management, Ine.'s disposal facility. The disposal <br /> documentation is attached. Al metal was recovered by the driller for recycling. <br /> If you have any questions,please call me at(5 10)336-9118. <br /> Sincerepti ESStoNq� <br /> wArk ``yc� <br /> 7 <br /> D.J. Watkins, PhD, PE,GE a No. 882 <br /> Vice <br /> .* <br /> V ice President * �. <br /> Dietz Engineering and Construction, Inc. �O�FCH �a�Q <br /> CA <br /> 33233 S. Koster Road 0 Tracy, CA 95304-9142 o (209) 832-2910 • Fax (209) 833-1288 <br />