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DISCUSSION OF ENVIRONMENTAL IMPACTS <br /> SII-92-9 <br /> Prosect Description <br /> This project is a Major Subdivision Application to subdivide a 13 <br /> acre lot into 13 commercial lots of 0.5 to 2 . 0 acres each. <br /> Proposed_ access is provided by Thornton road via Cal-_.Stop .__CI=I <br /> and Cal Court. <br /> Water supply, sewage disposal and drainage are to be provided by <br /> CSA 31. A discussion of the waste discharge issues is included in <br /> the attached February 24 , 1992 letter from the California Regional <br /> Water Quality Control Board. <br /> Water <br /> Treated waste water will be discharged to Highline Canal, a <br /> tributary to Dredger Cut then White Slough. <br /> Plant and Animal Life <br /> A survey of the Natural Diversity Data Base indicates two <br /> species listed as threatened (Calif. ) and Candidate 2 (Fed. ) The <br /> first is the California Black Rail heard calling in the White <br /> Slough Marsh. The second is the Giant Garter Snake which has been <br /> seen at the Coldani Mash, 0.8 miles West of Thornton Road at St. <br /> Rt. 12 . There is no evidence in the file to suggest that this <br /> project will impact either species. <br /> Noise <br /> The projected 75 dB CNEL noise contour for I-5 extends 102 feet <br /> from the edge of pavement. This noise contour extends <br /> approximately 50 feet into the western lots of this subdivision. <br /> This project will not expose people to significant noise levels. <br /> Initial Study (Rev: 01/91) <br /> 9 <br />