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Wm. J. Hunter & Associates 2220 Loma Vista Dr <br /> . Registered Geologists Sacramento, CA 95825 <br /> Petroleum& Mineral Appraisers (916)972-7941 <br /> FAX (916)972-1683 <br /> WORKPLAN FOR <br /> DRILLING & SAMPLING <br /> BOREHOLES <br /> 621.5 TAM O 'SHANTER DRIVE <br /> STOCKTON, CA (SITE CODE 1258) <br /> November 1 , 1991 <br /> PURPOSE OF WORK: To delineate horizontal & vertical extent of minor <br /> amounts of BTEX found in 3 of 5 boreholes previously drilled on <br /> Normac and adjacent property owned by Hammertown Partners. <br /> PROPERTY LOCATION: 6215 Tam O 'Shanter Drive, Stockton, California. <br /> NAME & ADDRESS OF PROPERTY OWNER: NORMAC, Inc. , 3449 Longview Drive, <br /> North Highlands, CA 95660 <br /> NAME & PHONE NO. OF CONTACT PERSON: Peter Voskes, (916) 482-2924 <br /> LEGAL DESCRIPTION OF PROPERTY: Refer- to Exhibit A. <br /> PA N 'S: 094-050-11 , (Normac; ) & 094-450-21 , (Hammertown Partners. ) <br /> Refer to Exhibit B. <br /> HISTORY OF PRIOR WORK: In 1989, a 1 ,000 gallon UST, which had <br /> Previously contained gasoline, was removed from the property. Soil <br /> samples taken from beneath the site of the removed tank were tested <br /> for STEX, EDB, TPH-G, and organic lead. The sample from the east <br /> end of the site was clean, but the sample from the west end revealed <br /> the presence of significant amounts of HTEX, EDB, & TPH-G. Refer to <br /> Table I for details. <br /> In January, 1990, work commenced to re-excavate the site using Jim <br /> Thorpe Oil equipment & personel . Approximately 300 cubic yards of <br /> spoil was removed, producing an ekcavation approximately 30'X 19' X <br /> 21 ' deep; (refer to Exhibit C. ) A total of 7 soil samples were taken <br /> from the sides and bottom of the pit as shown on Exhibits D & E. <br /> Laboratory analyzes, (Table II , ) revealed that both bottom samples <br /> and the two from the west sidewalls had unacceptable levels of HTEX <br /> & TPH-G. A workplan was prepared and submitted to remove additional <br /> spoil , but the San Joaquin Co. Environmental Health Division <br /> responded by stating that borings and/or monitoring wells would be <br /> required; (refer to Exhibit F. ) <br /> On July 17, 1990, a soil contamination workplan was submitted to the <br /> County EHD, (Exhibit G, ) to drill , log , & sample 5 boreholes to a <br /> 1 <br />