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CTeotogica 17 0 ChKiocs In C. <br /> 1172 Kansas Avenue <br /> Modesto,California 95351 <br /> (209)522-4119/Fax(209)522-4227 <br /> www.etienv.com <br /> 0 B';��E <br /> �Iv <br /> 'V IF.lrl� <br /> C= 1:2- i <br /> April 16, 2009 APR 2 2 "t�-:. <br /> �WONMEwr;-ftr L1 <br /> Project No.: 770.2 PRMITISERVUES <br /> Project Name: Marci Property . <br /> Mrs. Margaret Marci e f <br /> 20 Mobile Lane ' 5 ° <br /> Crescent City, CA 95531 <br /> RE: 1St Quarter 2009 Monitoring Report <br /> Marci Property, 2969 Loomis Road, Stockton, CA <br /> Dear Mrs. Marci: <br /> Geological Technics Inc. has prepared a Monitoring Report for the 1St Quarter 2009 in letter <br /> format, in compliance with C.C.R. Title 23, Division 3, Chapter 16 Section 2652. This quarterly <br /> report summarizes status of the investigation to date and for the first quarter of 2009, and <br /> outlines the next proposed sampling and analysis event. <br /> Summary of Investigation to date: <br /> An underground storage tank containing diesel fuel was formerly located on the property. A <br /> previous consultant, Wm. J. Hunter & Associates (WJH), installed four groundwater monitoring <br /> wells in an effort to determine if diesel fuel had impacted groundwater. In 1992, diesel <br /> contamination was detected in groundwater at the site. The Sari Joaquin County Public Health <br /> Services/Environmental Health Division (SJC PHS/EHD) subsequently directed that an <br /> investigation of the diesel release be initiated. <br /> The work performed to date is summarized below*: <br /> • March 1987—Two 5,000 gallon.diesel USTs removed. <br /> • March 1988 — UST excavation deepened to 29 feet below grade surface (bgs). <br /> Excavation was filled with clean backfill. <br /> • April 1992—Three groundwater monitoring wells installed (MW-1 through MW-3), Wm. <br /> J. Hunter& Associates. <br /> • May 1996—A single soil boring (LB-1) to 80 feet bgs installed, Lush Geosciences. <br /> • September 1997- Well MW-4 installation,Wm. J. Hunter& Associates. <br /> Geological Tecwcs Inc. April 16,2009 k <br /> i <br />