SITE INFORMATION AND CORRESPONDENCE_CASE 2

Home Browse Search

INFORMATION SHEET 3 ORDER NO. R5-2007- CITY OF TRACY AND LEPRINO FOODS COMPANY LAND DISCHARGE UNITS OF THE TRACY WASTEWATER TREATMENT PLANT SAN JOAQUIN COUNTY The improvements will improve the effluent quality over the current secondary level treatment. Only Phase 1 of the proposed expansion is estimated to be completed during the term of this Order, which would increase the treatment capacity to 10.8 mgd. The Report of Waste Discharge describes the proposed changes as follows: 1. Phase 1 (10.8 mgd Design Capacity). Phase 1 improvements will increase treatment to include nitrification/denitrification and tertiary filtration. The proposed improvements include the construction of new headworks with mechanical screening, replacement of existing primary clarifiers, construction of a flow equalization basin, construction of three additional secondary aeration basins, installation of two tertiary treatment modules, construction of new chemical building, and paving of sludge drying beds (1/6 of capacity, approx.). The expected initiation of operation of Phase 1 improvements is 1 August 2008. 2. Phases 2 — 4 (16 mgd Design Capacity). Phases 2-4 improvements expand the treatment and discharge capacity to 16 mgd. The proposed Phase 2 improvements include construction of a second outfall near the existing outfall, and paving of additional sludge drying beds. The proposed Phase 3 improvements include construction of one aeration basin/secondary clarifier, installation of a new filter pump for tertiary treatment, and paving of sludge drying beds. The proposed Phase 4 improvements include construction of a new primary clarifier, replacement of two effluent pumps with larger capacity pumps, construction of a sludge digester, and paving the remaining sludge drying beds. The proposed initiation of operation of the Phase 2, 3 and 4 improvements are 1 October 2012, 1 September 2014, and 1 November 2016, respectively. III. Applicable Plans, Policies, and Regulations A. Water Quality Control Plans. The Regional Water Board adopted a Water Quality Control Plan for the Sacramento River and San Joaquin River Basins (Basin Plan) that designates beneficial uses, establishes water quality objectives, and contains implementation programs and policies to achieve those objectives for all waters addressed through the plan. In addition, State Water Board Resolution No. 88-63 requires that, with certain exceptions, the Regional Water Board assign the municipal and domestic supply use to water bodies that do not have beneficial uses listed in the Basin Plan. The beneficial uses of the groundwaters underlying the Facility are designated as municipal and domestic supply, agricultural supply, industrial service supply, and industrial process supply. The Basin Plan on page II-1.00 states: "Protection and enhancement of existing and potential beneficial uses are primary goals of water quality planning..." and with respect to disposal of wastewaters states that "...disposal of wastewaters is [not]a prohibited use of waters of the State; it is merely a use which cannot be satisfied to the detriment of beneficial uses."