SITE INFORMATION AND CORRESPONDENCE_2005-CURRENT

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y i • amount disposed of on land at agronomic rates."" The City contends that the limits should apply only to wastewater discharged to the San Joaquin River, and should not include flows disposed of on land. To revise the permit as requested could permit the City to maintain its ongoing discharge of wastewater from the WQCF to land and increase its discharge to the San Joaquin River prior to completing facility upgrades to provide tertiary treatment. The limitations on average dry weather discharges established in the City's permit properly apply to all wastewater discharged from the WQCF, including ongoing discharges of treated wastewater to land. The limits on the amount of discharge set forth in effluent limitations B.7. and B.8., however, apply only to discharges from the WQCF and do not apply to the 0.55 mgd of segregated industrial wastewater that the City proposes to dispose of on land. IV. CONCLUSION Based on the findings above, the State Board concludes that the permit effluent limitations and the cease and desist order issued to the City should be revised to delete the 700 µmhos/cm EC effluent limitation for April 1 through August 30, and to maintain an EC effluent limitation of 1000 µmhos/cm year-round. The permit should also be revised to allow for discharge of treated effluent from the WQCF when there is a net downstream flow of 0.5 foot per second, rather than the present provision allowing for discharge during periods of outgoing tides. Finally, the City's permit should be revised to allow for using acid soluble methods of measurement for showing compliance with effluent limitations for aluminum for prevention of aquatic toxicity. V. ORDER IT IS HEREBY ORDERED that,based on the findings in this order, the effluent limitations established in Waste Discharge Requirements Order No. R5-2004-0028 are revised as follows: 1. The effluent limitations for electrical conductivity specified in Paragraphs B.2. and B.3. on pages 31 and 33 of Order No. R5-2004-0028 are revised to be 1000 µmhos/cm on a 4' Effluent limitation B.7.presently restricts 30-day average dry weather discharge to 8.11 mgd. Effective February 1,2009,effluent limitation B.8.restricts 30-day average dry weather discharges to 9.87 mgd. (Order R5-2004-0028,p. 35.) 22.