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RECEIT-D FEBi A B 10 z01� EuuFNNrrG B--Jli. C A L I r O a N 1 A M`rMArl O m RomouE2 Water Boards ENVIRONMENTAL HEALTH ENV-AONMENTAL PROTECTION PERMIT/SERVICES Central Valley Regional Water Quality Control Board XW 7 •��t w b 7 February 2014 To: Interested Parties PROPOSED NO FURTHER ACTION REQUIRED, US CAN —WELTY ROAD, HISTORICAL PIPELINES PROJECT, VERNALIS, SAN JOAQUIN COUNTY Site investigation and characterization activities have been completed at the referenced Chevron Environmental Management Company (Chevron) project. The US Can—Welty Road site (Site) is located at the intersection of Welty Road and California Highway 33, south of the rural community of Vernalis, San Joaquin County, California. The Site includes portions of the Highway 33 and the Union Pacific Railroad (UPRR) right-of-way (ROW) easements, and commercial/rural/agricultural properties along both sides of Highway 33. The ROWs associated with the historical Old Valley Pipeline (OVP) are on the southwest side of the highway. The historical Tidewater Associated Oil Company (TAOC) crude oil pipelines are located within the UPRR ROW. The historical TAOC and OVP pipelines are the responsibility of Chevron. Two active refined petroleum hydrocarbon product pipelines are within the UPRR easement ROW. Based on results of several soil and groundwater investigations, Central Valley Regional Water Quality Control Board (Central Valley Water Board) staff concurred in an April 2011 letter to Chevron, that crude oil affected soil and groundwater had been delineated. Chevron submitted a request for No Further Action Required (NFAR) report dated 24 September 2013. The onsite areas of affected soil and groundwater are depicted on the enclosed Site Plan. Crude oil affected groundwater extends downgradient, northeast to adjacent properties. The offsite properties are being investigated separately as the Ahern Road-Vernalis project with regulatory oversight provided by Central Valley Water Board staff. Additionally, the affected area on the south of the Site overlaps with the Vernalis Pump Station project, also with regulatory oversight provided by Central Valley Water Board staff. Pursuant to California State Water Resources Control Board (State Water Board) guidance, the Central Valley Water Board requires that parties in the vicinity of the Site be provided an opportunity to participate in the closure process. According to San Joaquin County Clerk records, the referenced properties with associated Assessor Parcel Numbers (APNs), described on accompanying Table 1 provided by Chevron, overlie crude oil affected soil/groundwater or are within 200-feet of the approximate outline of the affected soil and/or groundwater. You have been identified as a property owner or representative of a firm/company that is owner of record for the parcel(s) indicated on the enclosed Table 1. Please review the enclosed Fact Sheet that summarizes the Site conditions as determined by the site investigation and characterization findings. State Water Board guidance establishes a 20- to 30- day review period for property owners, and/or persons identified in the offsite property owner survey, and/or other interested parties, to provide comment. A Site Plan depicting the areas of affected soil KAnL E. LoNcLEY SCD, P.E.. GIIAIO I PAMELA C. GFtEEDON P.E., BOLE, [XrGU71VL orrlc[r, 1605 E Street,Fresno.CA 93706 1 www.waterboards.ca.qov/centralvallev •Ci NEC:YCL .PAPER.