WORK PLANS - Laserfiche WebLink

Home Browse Search

CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION REVISED MONITORING AND REPORTING ORDER NO. R5-2012-0805 CALIFORNIA WATER CODE SECTION 13267 FOR CONOCOPHILIPS PETROLEUM COMPANY, CHEVRON USA, TEXACO REFINING AND MARKETING INC., L&M PETROLEUM COMPANY, AND MR. BILLY MCKINNON L&M OPERABLE UNIT SAN JOAQUIN COUNTY This Order is issued to ConocoPhilips Petroleum Company; chevron, USA; Texaco Refining and Marketing Inc.; Tosco Corporation; L&M Petroleum Company; and Mr. Billy McKinnon (hereafter Dischargers) pursuant to California Water Code section 13267, which authorizes the Executive Officer of the California Regional Water Quality Control Board, Central Valley Region (hereafter Central Valley Water Board) to issue a Monitoring and Reporting Order (Order). The Executive Officer finds: INTRODUCTION 1. The Dischargers are jointly responsible for the South Shore Parcels L&M Operable Unit (Site). The L&M Operable Unit was formed as a result of the breakup of the previous joint discharger, the Stockton Group. 2. The Site is located at 666 West Weber Street, Stockton, just south of the Stockton Deep Water Channel. The discharger is responsible for cleanup of the area west of the centerline of former Harrison Street, extending south to Mormon slough and north to the Stockton Deep Water Channel (Figure 1), and the Delta Gateway Apartments. Historical bulk fuel storage/distribution facilities as well as various commercial uses resulted in the release of chemicals to the subsurface. Four distinct groundwater bearing zones exist at the Site: • A-zone extends from approximately 5 feet below ground surface (bgs) to 40 feet bgs. • B-zone extends from approximately 42 feet bgs to 50 bgs. • C-zone extends from approximately 64 feet bgs to 73 feet bgs. • D-zone extends from approximately 115 feet bgs to 130 feet bgs. 3. Since 1989, the Site has been the subject of numerous investigations and studies. In December 2003, the Dischargers installed a dual phase extraction (DPE) system at the site, which has been in operation since its construction. In 2004, the Dischargers performed pipeline abandonment and removal activities at the site.