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CLEANUP AND ABATEMENT ORM�_R NO. R5-2007-0725 DOLLY MADISON/LANGENDORF BAKERY 1426 S. LINCOLN ST., STOCKTON SAN JOAQUIN COUNTY -7- background water quality cannot be achieved, the CAO should require the discharger(s) to abate the effects of the discharge. Abatement activities may include the provision of alternate water supplies." (Enforcement Policy, P. 19.) 25.The Regional Board's Water Quality Control Plan for the Sacramento River and San Joaquin River Basins, 41h Edition (hereafter Basin Plan) designates beneficial uses of the waters of the State, establishes water quality objectives (WQOs) to protect these uses, and establishes implementation policies to implement WQOs. The beneficial uses of the groundwater beneath the site are domestic, municipal, industrial, and agricultural supply. 26.The wastes detected at the site are not naturally occurring, and some are known human carcinogens (Benzene, TBA, Lead and 1,2-DCA) or suspected carcinogens (MtBE). Pollution of groundwater with these wastes impairs or threatens to impair the beneficial uses of the groundwater. 27.WQOs listed in the Basin Plan include numeric WQOs, e.g., state drinking water maximum contaminant levels (MCLs), and narrative WQOs, including the narrative toxicity objective and the narrative tastes and odors objective for surface and groundwater. Chapter IV of the Basin Plan contains the Policy for Application of Water Quality Objectives, which provides that "[w1here compliance with narrative objectives is required (i.e., where the objectives are applicable to protect specified beneficial uses), the Regional Board will, on a case-by-case basis, adopt numerical limitations in orders which will implement the narrative objectives." The numerical limits for the waste constituents of concern listed in the following table implement the Basin Plan WOOS. Constituent Limits WQO Reference Total Petroleum 5 ug/I Tastes and Odor McKee & Wolf, Water Quality Hydrocarbons as Criteria, SWRCB, p. 230 Gasoline Benzene 0.15 ug/I Toxicity California Public Health Goal OEHHA Toluene 42 u /I Taste and Odor Federal Register, Vol. 54, No. 97 Eth (benzene 29 u /I Taste and Odor Federal Register, Vol. 54, No. 97' Xylenes 17 u /1 Taste and Odor Federal Register, Vol. 54, No. 97 MTBE 5 u /I Taste and Odor Federal Register, Vol. 54, No. 97 1,2-DCA 0.4 ug/I PHG California Public Health Goal OEHHA 28.The constituents listed in Finding Nos. 9, 11, and 16 are wastes as defined in California Water Code Section 13050(d). The groundwater exceeds the WQOs for the constituents listed in Finding No. 27. The exceeding of applicable WQOs in the Basin Plan constitutes pollution as defined in California Water Code Section 13050(1)(1).