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WASTE DISCHARGE REQUIREMTS ORDER NO. • g CITY OF LATHROP AND METROPOLITAN LIFE INSURANCE COMPANY CROSSROADS TREATMENT PLANT NO. 1,SAN JOAQUIN COUNTY 43. This Order establishes interim groundwater limitations for the WWTF that will not unreasonably threaten present and anticipated beneficial uses or result in groundwater quality that exceeds water quality objectives set forth in the Basin Plan. This Order contains tasks for assuring that BPTC and the highest water quality consistent with the maximum benefit to the people of the State will be achieved. Accordingly, the discharge is consistent with the antidegradation provisions of Resolution 68-16. Based on the results of the scheduled tasks, the Board may reopen this Order to reconsider groundwater limitations and other requirements to comply with Resolution 68-16. Water Recycling 44. The California Department of Health Services (DHS)requires that the the American Water Works Association(AW WA) Guidelines for Distribution of Non-Potable Water be implemented in design and construction of recycling equipment. The guidelines require installation of purple pipe, adequate signs, etc. Adequate separation of the recycled water lines, the domestic water lines, and the sewer lines shall be provided. Provision F.La requires the Discharger to submit, and receive approval from DHS, design reports for all domestic water lines and recycled water lines both at the wastewater treatment facility and the use areas prior to discharging wastewater in the new land application areas. 45. DHS has established statewide criteria in Title 22, CCR, Section 60301 et. seq. (hereafter Title 22). DHS revised the water recycling criteria contained in Title 22 on 2 December 2000. The revised Title 22 required that all wastewater used for reclamation receive, at a minimum, secondary treatment. However, Title 22 does not define secondary treatment with respect to numerical limits for BODS and total suspended solids (TSS). According to DHS, for uses not requiring disinfection, treated wastewater should, at a minimum, be adequately oxidized, contain dissolved oxygen near saturation levels, and be nonputrescible when applied to land. 46. Title 22, Section 60303 states that water recycling requirements shall not apply to the use of recycled water onsite at a water recycling plant, or wastewater treatment plant, provided access by the public to the area of onsite recycled water use is restricted. 47. Title 22, Section 60323(a) states that no person shall produce or 4upply reclaimed water for direct reuse from a proposed water reclamation plant unless an engineering report is submitted for review and approval by DHS and the Board. Fodder and fiber crops and pasture for animals not producing milk for human consumption is considered a beneficial reuse. A Title 22 Engineering Report was submitted to DHS in June 2001. DHS commented on the report in 5 July 2001 correspondence. Provision F.La requires additional documents to be submitted to DHS prior to application of wastewater. 48. DHS has recommended that storm water discharges from wastewater recycling areas be fully contained and returned year round to storage ponds. Storm water runoff from these areas can be allowed provided the following conditions are met: a. Disinfection of the wastewater to a 23 MPN/100 ml monthly median with a 240 MPN/100 ml daily maximum is to be maintained, or the irrigation area is disinfected prior to storm water release, as approved by DHS.