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+� From Science to Solutao - <br /> r <br /> HPP-BTR MP a20a.1 <br /> US Can-Welty Road Reports <br /> DCN:C20-SAI-Welty-Road/US-Can-01-8019 <br /> r <br /> October 25, 2005 <br /> r <br /> Mr. M. Scott Mansholt <br /> Chevron Environmental Management Company <br /> ` 6001 Bollinger Canyon Road <br /> P.O.Box 6012 <br /> San Ramon, California 94583-0712 <br /> Subject: Third Quarter 2005 Groundwater Monitoring and Sampling Report <br /> US Can—Welty Road <br /> 35275 Welty Road <br /> Vernalis,California <br /> ` Dear Mr.Mansholt: <br /> At the request of Chevron Environmental Management Company(CEMC), Science Applications <br /> International Corporation (SAIC) has prepared this report for groundwater monitoring and <br /> sampling activities conducted at the US Can—Welty Road site, Vernalis, California (Figure 1). <br /> The groundwater monitoring and sampling program was initiated at the request of the Regional <br /> Water Quality Control Board(RWQCB). This report presents the results from the third quarter <br /> monitoring and sampling event. Currently, five groundwater monitoring wells are being used to <br /> evaluate hydrologic and water-quality conditions at the site. Pertinent site features and the <br /> locations of monitoring wells are shown on Figure 2. <br /> BACKGROUND <br /> _ SITE DESCRIPTION AND USE <br /> The site is located at 35275 Welty Road, Vernalis, San Joaquin County, California. Currently, a <br /> paper insulation manufacturer, Insulair Inc., occupies the site. The site formerly belonged to a <br /> container manufacturer,Hunter Container Company,and a can manufacturer, U. S. Can <br /> Company. The site is located in a rural and light-industrial area and is bordered by Welty Road <br /> on the east,Highway 33 on the north, and agricultural fields south and west of the site. The site <br /> location is presented on Figure 1. <br /> The site is located within the Central Valley Physiographic Province of California and has a <br /> relatively flat topography that slopes gently downward to the northeast. The site is situated at an <br /> elevation of approximately 103 to 105 feet above mean sea level (MSL). <br /> From the early 1900s to the 1960s Standard Oil (predecessor to Chevron)operated the former Old <br /> Valley Pipeline (OVP), which transported heated heavy petroleum (crude oil and Bunker C fuel <br /> oil) from Bakersfield to Richmond, California. The OVP was located along the northeastern side <br /> of the site and parallel to the existing Union Pacific Rail Road (UPRR)tracks and Highway 33. <br /> 3800 Watt Avenue, Suite#210, Sacramento,CA 95821(916)974.8800 'Fax:(916)979-3735 <br /> L <br />