Laserfiche WebLink
4 <br /> 7hN310 <br /> I <br /> 4 November 2004 <br /> Project: 2597 . 11 <br /> Ms. Vicky McCartney <br /> San Joaquin County Environmental Health Division 33�Br�2'��iQl1J�1�1 <br /> 304 E Weber Street, 3rd Floor HiTPH "Ltd€ MAI 1OnLM3 <br /> Stockton, California 95202 6001 9 0 AON <br /> Subject: Investigation Work Plan <br /> Soil and Groundwater Investigation �lI � A 0 A b <br /> Former County Motor Pool Site <br /> 130 North Hunter Street <br /> Stockton, California <br /> Dear Ms . McCartney: <br /> This Work Plan describes the investigation proposed for the Former County Motor Pool Site at <br /> 130 North Hunter Street in Stockton, California (Figure 1 ) . Treadwell & Rollo has been retained <br /> by the City of Stockton to coordinate the environmental issues at this site, which is currently <br /> being supervised by the San Joaquin County Environmental Health Division (SJCEHD) in the <br /> underground storage tank (UST) program. <br /> The City of Stockton has recently purchased the Site from San Joaquin County. Following <br /> demolition of the existing structure and the adjacent building to the northwest and east, the City <br /> of Stockton is planning to build a new parking structure with some ground floor retail space <br /> along Channel Street. <br /> The purpose of the soil and groundwater investigation is to delineate the extent of contamination <br /> to enable the design of appropriate remedial measures. <br /> To determine locations of the proposed sampling locations Treadwell & Rollo has reviewed the <br /> 29 September 2004 report titled Groundwater Monitoring Report Second and Third Quarters <br /> 2004, San Joaquin County Parking Garage, prepared by Ramage Environmental Inc., the UST <br /> removal documentation, and discussed and visited the Site with you. <br /> BACKGROUND <br /> The Site consists of a large warehouse building that previously operated as a parking lot and auto <br /> service center. In 1996, two gasoline USTs (8 ,000 and 1 , 000 gallons) were removed from the <br /> sidewalk in front of the Site (Figure 2) . Product lines trended approximately 30-feet from the <br /> USTs to a pump island located in the building. The fuel lines from the USTs to the pump islands <br /> appear to have been removed, but no samples appear to have been collected below the fuel lines. <br /> Subsequent soil and groundwater investigations have identified relatively high concentrations of <br /> gasoline, benzene and other petroleum hydrocarbons in soil and groundwater below the former <br /> Treadwell & Rollo, Inc. Environmental & Geotechnical Consultants <br /> 555 Montgomery Street, Suite 1300, San Francisco, CA 94111 <br /> Telephone (415) 955-9040 Facsimile (415) 955-9041 <br />