Laserfiche WebLink
N�/F N <br /> f S1 <br /> aril`O <br /> From Science to Solutions <br /> HPP-BTR MP#204.4 <br /> Vernalis Pump Station <br /> Reports <br /> DCN:C20-SAI-Vernalis-01-12044 <br /> July 24,2007 <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: Second Quarter 2007 Groundwater Monitoring and Sampling Report <br /> Vernalis Pump Station <br /> 35500 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 to summarize groundwater monitoring <br /> and sampling activities conducted at the Vernalis Pump Station site(the site),Vernalis, California <br /> (Figure 1). The groundwater monitoring and sampling program at the site was initiated at the <br /> request of the California Regional Water Quality Control Board—Central Valley Region <br /> (RWQCB)to characterize the extent of impact to groundwater from the former Old Valley <br /> Pipeline(OVP) system. This report presents the results from the second quarter 2007 monitoring <br /> and sampling event. Currently, seven groundwater monitoring wells are being utilized to <br /> evaluate hydrologic and water-quality conditions at the site. Pertinent site features and the <br /> locations of site monitoring wells are shown on Figure 2. <br /> BACKGROUND <br /> SITE DESCRIPTION AND USE <br /> The site is located at 35500 Welty Road,Vernalis, San Joaquin and Stanislaus counties, <br /> California(Figure 1). The former pump station consists of two properties: the Bellini property <br /> (formerly known as the Roberts property)and the Arcos property. The Bellini property is located <br /> on the northern part of the site, and the Arcos property is located on the southern part of the site <br /> (Figure 2). The Bellini property is a triangular shaped, 5.73-acre vacant lot. The Arcos property <br /> is irregularly shaped and is currently used as a storage facility for equipment and materials. A <br /> residence and an office are also located on the Arcos property. The former pump station site is <br /> located in a rural and light-industrial area and is bordered by Welty Road on the west,Union <br /> Pacific Rail Road(UPRR)tracks and Highway 33 on the northwest, light-industrial facilities on <br /> the southeast, and agricultural areas on the south. Currently,Kinder Morgan Energy Partners,L. <br /> P. (KM)maintains a high-pressure,petroleum-product pipeline near the site that transports <br /> gasoline,jet fuel,and diesel. The KM pipeline is located along and outside of the northeastern <br /> site boundary within the UPRR right of way(ROW). According to a 1995 Environmental Site <br /> Assessment,the KM product pipeline was installed approximately 4 to 5 feet below ground <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 />