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California Regional Water Quality Control Board Central Valley Region Robert Schneider,Chair Winston H.13ickoz Gray Davis Searetaryfor Sacramento Main Office Governor Environmental . Internet Address: http://w .swrcb.ca.gov/rwgcb5 Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 Phone(916)255-3000•FAX(916)255-3015 25 November 2002 Bruce Coleman RE��n/J�D Community Development Director v1 City of Lathrop NOV 2 g 2002 16775 Howland Road ENVIRONMENT HEALTH Lathrop, CA 95330 PERMIT/SERVICES SCH#1 993112 02 7, DRAFT SUBSEQUENT EIR FOR RIVER ISLANDS AT LATHROP PROJECT, LATHROP, SAN JOA QUIN COUNTY I have reviewed the Draft Subsequent Environmental Impact Report (DSEIR),Urban Design Concept, and West Lathrop Specific Plan for the proposed River Islands at Lathrop development, San Joaquin County. The document package was distributed by the City of Lathrop Community Development Department and is identified by State Clearinghouse No. 1993112027. This letter provides comments on the DSEIR and identifies issues that may require further discussion. The Regional Board previously commented on this project in letters dated 9 November 2001 and 13 February 2002. Project Description The project consists of development o£4,905 acres of open space and agricultural land on Stewart Tract into office,retail, residential, recreational, and open space. Approximately 11,000 homes, a town center, and an employment center are planned. The project is divided into two phases with the first phase to be completed around 2015 and the second phase completed around 2027. The DSEIR primarily addresses the first phase of development, the second phase is only conceptually addressed. The DSEIR states wastewater will be treated in the existing Wastewater Treatment Plant No. 1 (Crossroads) and will be returned to the development for application. It has been brought to the attention of the Regional Board that the Crossroads treatment plant will not be available to treat the project's wastewater and that an entirely new treatment plant will be constructed adjacent to the Crossroads facility. In addition, the DSEIR refers to an EIR addressing construction of the new wastewater treatment plant but that EIR has not been distributed to the Regional Board. The DSEIR must be revised to correctly describe the wastewater treatment that is planned and only reference documents that have been published for public review. In general, it is impossible to provide meaningful comments on the planned wastewater treatment system because so few details are described in the DSEIR. The following comments address Table 2-1: Item 4.8-b,Interior Lake Quality. Because If collection of recycled water from golf courses and water from the interior lake would come into other irrigated areas are discharged to the interior contact with groundwater and would be pumped lakes, subsequent pumping of the interior lake water into Paradise Cut, these waters also could be into the Paradise Cut might be considered a surface California Environmental Protection Agency .fid Recycled Paper The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.ca.gov/mgcb5