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From Science to Solutions <br /> HPP-BTR MP#215.5 <br /> Alden Park <br /> ' Reports <br /> Accession#06102.20090401.001 <br /> April 15, 2009 <br /> Mr. M. Scott Mansholt <br /> Chevron Environmental Management Company <br /> 6111 Bollinger Canyon Road <br /> ' P.O. Box 6012 <br /> San Ramon, California <br /> Subject: Annual 2009 Groundwater Monitoring and Sampling Report <br /> Alden Park <br /> Tracy, California <br /> Dear Mr. Mansholt: <br /> ' Science Applications International Corporation (SAIC) prepared this annual report at the request <br /> of Chevron Environmental Management Company (CEMC) for groundwater monitoring and <br /> sampling activities conducted at Alden Park (the site) in Tracy, California(see Figure 1). The <br /> monitoring and sampling program was conducted in accordance with Regional Water Quality <br /> Control Board—Central Valley Region (RWQCB) Monitoring and Reporting Plan (MRP) Order <br /> No. R5-2006-0812. This report presents results of the January 2009 monitoring and sampling <br /> ' event, and a summary of separate-phase oil (SPO) extractions and oleophilic sock monitoring <br /> throughout 2008 and the first quarter of 2009. Seventeen groundwater monitoring wells are <br /> currently used to evaluate water quality conditions beneath the site. Pertinent site features and <br /> ' groundwater monitoring well locations are shown on Figure 2. <br /> BACKGROUND <br /> SITE DESCRIPTION AND USE <br /> The Alden Park reservoir was built in 1928, and operated as a storage and distribution center for <br /> ' Bunker C fuel oil. The reservoir was part of the Old Valley Pipeline (OVP) system that operated <br /> from the early 1900s to the 1960s to transport San Joaquin Valley crude oil from Bakersfield to <br /> the Richmond Refinery, and Bunker C locomotive fuel from the Richmond Refinery to Tracy. <br /> ' The fuel oil was loaded onto railroad tank cars for distribution as steam locomotive fuel <br /> throughout the western U.S. The facility consisted of one 750,000-barrel (approximately <br /> 31,500,000-gallon), concrete-lined reservoir. The reservoir was approximately 632 feet in <br /> ' diameter and 25 feet deep (about 17 feet above the ground surface, and 8 feet below ground <br /> surface [bgs]), and was surrounded by a dirt firewall. An estimated 30,000 barrels of Bunker C <br /> ' oil were received at the reservoir daily. <br /> ' Science Applications International Corporation <br /> 3800 Watt Avenue I Suite#210/Sacramento,CA 95821 /tel: (916)974-8800/fax:(916)979-3735 1 saic.com <br />