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Information Sheet IS-10 Reissued Waste Discharge Requirements General Order R5-2013-0122 Existing Milk Cow Dairies (b)the highest water quality consistent with maximum benefit to the people of the State will be maintained. Generally speaking, these provisions State Anti-Degradation Policy Flowchart require that the Board adopt standards and requirements to ensure the 1.The Board uses the ROWD and its Best discharger controls the discharge by Professional Judgment(BPJ)to derive a list of The Initial Water Constituents of Concern(CDCs)in the QualitV Assessment employing "best practicable treatment or discharge that could degrade groundwater control" methodologies to limit the extent of the degradation, and that the Board carefully consider whether the permitted 2.The Board derives numeric limits or other degradation inheres to the maximum restrictions for the COCl that will protect the benefit to the people of the State when Beneficial Uses the Board prescribes waste discharge requirements that will result in the degradation of high-quality waters. The 3.The Board determines"baseline"receiving State Anti-Degradation Policy also water quality(the best quality that existed since 1968,minus any previously-authorized requires that the Board prohibit waste degradation) discharges from resulting in water pollution or nuisance, though this is a requirement that also exists outside the 4.Compare the baseline(Step text of the State Anti-Degradation 3)to the numeric limits(Step 2). Policy does not apply;the Board cong Is the receiving water a"High- must ensure that the Discharger Policy. (see Wat. Code, § 13263.) Quality"water? No utilizes"Best Efforts" Yes The State Water Board has provided only limited guidance regarding the State S.Review the ROWD and Anti-Degradation Policy. The State Water analyze the discharge.Will the Does the Po11CV discharge degrade the High- Board's Administrative Procedures Quality water? No Apply? Update 90-004 provides guidance for Yes implementing State Anti-Degradation Policy and the Clean Water Act's anti- 6.Will WDRs developed from the ROWD result in the"Best The Board must require the degradation provisions (40 C.F.R. § Practicable Treatment or Discharger to upgrade its waste Control"eTreat of the Treatment stes? No management practices 131.12.) in the context of NPDES permitting. Although APU 90-004 is not Yes directly applicable to the Dairy General 7.Is the degradation Order because nonpoint discharges from "Consistent with the Maximum The Board is prohibited from agriculture are exempt from N PDES Benefit to the People of the allowing the degradation to State"? No occur permitting requirements, the Appellate Court found this document informative in Yes interpreting the State Anti-Degradation If the Board prescribes WDRs, Policy. The following analysis adheres to 8.Will the discharge meet water either the WDRs or a separate existing guidance and the Appellate quality objectives? Order must include a time No schedule for Discharger to meet Courts decision in the AGUA case. water quality objectives Yes All elements of the Anti-Degradation Policy are met—the Policy:Application Board may prescribe WDRs