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This report outlines the compliance efforts pertaining to the Clean Water Act (CWA) standards, focusing on local limits and categorical standards under 40 CFR Part 403. It details findings on Significant Industrial Users (SIUs) regarding permit accuracy, representative sampling, and instances of non-compliance. The report highlights the elimination of discharges and examines performance indicators related to emerging pollutants and biosolids treatment. For further inquiries, please contact L. Keith Silva, Pretreatment Coordinator at the U.S. EPA Pacific Southwest Region.
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Basic Enhanced Fully Comply with local limits and categorical standards 403.6 CWA § 1251 Eliminate discharges No. of SIUs with no violation of cat. stds. and local limits Correct permits and representative sampling 403.8(f)(1)(iii) & (v) 403.12 No. of facilities with incorrect permits or unrepresenta-tive sampling Interference Pass Through 403.5(a)(1) & (b)(4), (5) & (6) No. of instances of I&PT Pretreatment Performance Biosolids voluntarily meet Excpt. Qlty. (Tbl 3) 503 Regs. 403.2 No. of facilities at Excpt. Qlty CIUs voluntarily at zero discharge CWA § 1251 Eliminate discharges No. of facilities at zero discharge Emerging Pollutant Controls (Dental Hg & others) CWA § 1251 Eliminate discharges No. of pollutants & facilities with effective cntrl. pH violations Corrosion 403.5(b)(2) No. of pH violations Observed corrosion Spills due to nondomestic users 403.5(b)(3) No. of spills Explosions Haz. Atm. 403.5(b)(1)&7 No. of explosions Instances of haz. atm. (incl. closed cup test) Parameters Authority Measurements Pacific Southwest Region
For more information, please contact: L. Keith Silva Pretreatment Coordinator Clean Water Act Compliance Office (WTR-7) Water Division Pacific Southwest Region U.S. Environmental Protection Agency 75 Hawthorne Street San Francisco, California 94105-3901 Phone: 415.972.3509 Fax: 415.947.3549 E-mail: silva.keith@epa.gov