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t 1 INTRODUCTION <br /> D K Barber P E and Associates' staff prepared this workplan to complete the <br /> characterization of groundwater and soil impacted with petroleum hydrocarbons to <br /> support a closure request for the Acampo Plant site for Westem Oil & Spreading, Inc <br /> (WO&S) on approximately 2 13 acres of relatively flat, covered by aggregate road base, <br /> improved land hosting a liquid asphalt and lignin based road oil storage and mixing <br /> facility The site's industrial history has been chronicled back to 1955 Currently there are <br /> 16 above ground storage tanks containing water or lignin based products The site is <br /> active In 1985 the business was purchased by Mike and John Telfer and renamed <br /> Western Oil and Spreading, Inc The site is located at 19256 N Highway 99, several <br /> hundred yards east of the frontage road Reference Figure 1, Location Map The <br /> relatively flat site is bordered on the north by an open field (previously an apple orchard), <br /> to the east and south by open fields and to the west by several homes, separating it from <br /> the frontage road It is one quarter mile south of Woodbridge Road in Acampo, CA within <br /> San Joaquin County <br /> 11 Work to Date <br /> Two 20,000 GA UST's used to store liquid asphalt, one 1,000 GA UST used to store <br /> diesel fuel, and one 500 GA UST used to store gasoline fuel were removed from the site <br /> property on October 22, 1987 ' Analytical results collected during the tank removals <br /> ' indicated petroleum impacted soil within the 20,000 GA cavity location <br /> On December 10,1998 Gallardo & Associates, Windsor, CA (Gallardo) was retained by <br /> the owner's representative Jeff Hopkins, to plan and perform a limited soil and <br /> Igroundwater investigation Field work was performed March 23 and 24, 1999 by <br /> Gallardo, as proposed and accepted by San Joaquin County Public Health Services, <br /> Environmental Health Division (PHS/EHD) A report summarizing findings was forwarded <br /> to Jeff Hopkins on May 24, 1999 by Rafael L Gallardo, R G No 6834 <br /> The investigative work to date by others has included identifying petroleum hydrocarbon <br /> contamination in the locations of the two aforementioned asphalt and diesel fuel <br /> 1 "LIMITED SOIL AND GROUNDWATER INVESTIGATION REPORT for 19256 N HIGHWAY 99,ACAMPO,CALIFORNIA"May <br /> 24,1999, Rafael Gallardo <br /> S <br />