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Comment Letter D County of Orange September 22, 2005 Comment DI-A The submitted comment requests the Draft Environmental Impact Report (DEIR) provide a description of the project characteristics. Section 3.0 of the DEIR provides a description of the project site and the proposed project. Section 4.9 of the DEIR addresses drainage and water quality issues associated with the implementation of the proposed project. The following infonnation has been provided to supplement the project characteristics provided in the DEIR. The project site is located within the Lower Santa Ana River Watershed. The project site consists of 9 .18-acres and was the former location of an office use and parking lot. The project site has been recycled and is currently undeveloped. The majority of the project site currently consists of pervious surfaces. The project site would be developed with residential uses and would consist of more pervious surfaces than the former office use on the project site. A total of 6.31-acres of the project site would consist of residential lots, .9 I-acres would consist of open space and 1.9 6-acres would consist of roadways. Comment DI-B The submitted comment references that priority projects identified in the Drainage Area Management Plan should be reviewed for potential storm water/urban runoff impacts. Through the City's development review process, the proposed project has been recognized as a priority project. The potential water quality impacts associated with the implementation of the proposed project are evaluated in the DEIR. As shown on Page 23 ofthe DEIR, to mitigate potential water quality impacts associated with storm water/urban runoff generated by the proposed project, the following mitigations measures would be implemented: WQ-I Prior to the issuance of grading permits, the project applicant shall provide proof of coverage under NPDES General Construction Activity Storm Water Permit, which includes a copy of the project permit number and two copies of the Storm Water Pollution Prevention Plan. WQ-2 Prior to issuance of grading permits the project developer shall submit and have approved a surface drainage/utility plan that depicts all applicable Site design, Structural Source Control and treatment Control Best Management Practices in accordance with the Orange County Drainage Area Management Plan and the City of Santa Ana Local Implementation Plan. 75~45