Laserfiche WebLink
3164 Gold Camp Drive <br /> 02 MAR -� AM 10: 11, Suite 200 <br /> "eltaCordova California 95670-6021 <br /> 916/63 <br /> EnvironmentaE 916/638-2085 <br /> Consultants,Inc FAX 916/538-8385 <br /> February 28, 2002 <br /> Mrs Margaret Lagono <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Ave , Third Floor <br /> Stockton, CA 95202 <br /> Subject Subsurface Assessment and Well Installation Report <br /> Atlantic Richfield Company Facility No 6100 <br /> 25775 Patterson Pass Road <br /> Tracy, California <br /> Delta Project No D000-340 <br /> Dear Mrs Lagono <br /> • On behalf of Atlantic Richfield Company (ARCO), Delta Environmental Consultants, <br /> Inc (Delta) has prepared this Subsurface Assessment and Well Installation Report <br /> documenting the results of a subsurface investigation conducted at ARCO Facility <br /> No 6100, located at 25775 Patterson Pass Road, Tracy, California (Figure 1) The <br /> purpose of the additional subsurface investigation was to characterize the hydrogeology <br /> beneath the site, assess the extent of liquid-phase hydrocarbons, and evaluate the extent <br /> of fuel oxygenates in the vicinity of the underground storage tanks and fuel dispensers <br /> Delta implemented work activities outlined in a work plan dated May 22, 2001 This <br /> report presents the findings of the investigation <br /> SITE BACKGROUND <br /> The site is currently an active ARCO service station located at the northwestern corner of <br /> the intersection of Patterson Pass Road and Interstate 580 near Tracy, California The <br /> facility configuration is shown on Figure 2 The site is approximately 300 feet above <br /> mean sea level (msl) with topography sloping towards the southeast The area <br /> surrounding the property is undeveloped land <br /> Originally, one 550-gallon waste oil underground storage tank (UST), and one 10,000- <br /> gallon and four 6,000-gallon gasoline USTs were present at the site The waste oil tank <br /> was removed in 1987 From November 1990 to February 1991, the five gasoline USTs <br /> and associated product delivery lines were removed The five USTs were replaced with <br /> four 10,000-gallon gasoline USTs <br /> s <br /> Providing a Competitive Edge <br />