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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION REVISED MONITORING AND REPORTING PROGRAM NO. R5-2008-0825 FOR HJ BAKER & BRO. INC., MARTIN OPERATING PARTNERSHIP, THE PORT OF STOCKTON, AND METROPOLITAN STEVEDORE MOLTEN SULFUR PROCESSING PLANTS SAN JOAQUIN COUNTY This Revised Monitoring and Reporting Program (Revised MRP) describes requirements for monitoring industrial locations that are associated with processing molten sulfur into prill. After processing, the sulfur prill is stockpiled, stored, and later conveyed off site. HJ Baker & Bro., Inc. (Baker) processes molten sulfur and stockpiles the sulfur prill; Martin Operating Partnershiy_ (Martin) processes molten sulfur and stockpiles the prill; and the Port of Stockton (the Port) arict. Metropolitan Stevedore (Metropolitan) convey the prill to ships for transport by others. Baker, Martin, the Port, and Metropolitan are collectively referred to as the "Discharger" within this revised MRP. As part of operations, Martin and Baker each store prill stockpiles outside and exposed to environment. In In addition, the stockpiles inherently retain some moisture as part of the prillin process. After precipitation and/or moisture contacts the sulfur prill, an acidic solution is form that has elevated concentrations electrical conductivity, sulfur, and sulfate. Throughout this revised MRP, this acidic solution is referred to as "sulfur-contact water". As described in a site investigation report, groundwater has been impacted by the sulfur K iJ_D operations. This revised MRP requires groundwater monitoring by the Discharger and facility- specific monitoring by Baker, Martin, and the Port. Pursuant to Section 13267 of the Californi Water Code, the Discharger must comply with this revised MRP. Failure to comply with this revised MRP constitutes noncompliance with the Water Code, which can result in the impositirr- of civil monetary liability. The Discharger must not implement any changes to this revised M Fc ..) unless another revised MRP is issued by the Executive Officer. MONITORING All monitoring must be conducted in accordance with a Sample Collection and Analysis Plan, which must include quality assurance and quality control standards which are acceptable to the California Regional Water Quality Control Board, Central Valley Region (Central Valley Water Board). The Discharger submitted its Sample Collection and Analysis Plan, and the Regional Water Board concurred with the plan on 26 March 2009. The groundwater monitoring wells, the surface water sampling location, and facility locations are shown on Attachment A.