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MOUNTAIN HOUSE PROPOSED ALTAMONT HEIGHTS TENTATIVE MAP 4.ENVIRONMENTAL CHECKLIST 4.16 UTILITIESANDSERVICE . j could include a cease-and-desist order. If corrective actions do not satisfy the RWQCB, it could impose a moratorium on new sewer connections. Thus, the'MHCSD will [Hake sure wastewater treatment requirements are not exceeded, and a less-thai"-significant impact would occur. Mitigation Measures , # No mitigation measure's are required: - F b) Require or result in the construction of new water or wastewater treatment facilities or 1 expansion of existing facilities, the construction of which could cause significant environmental effects? The proposed project would include 53 low density (R/L) dwelling units and six second dwelling units (Siegfried Engineering, 2006). The water demand and wastewater generation for the proposed project at build-out is presented in Table 4.16-1. The water demand and wastewater generation are 15.2 and 20.0 percent,respectively, of the totals for Specific Plan III. a Table 4.16-1 Proposed Altamont Heights Water Demand and Wastewater Generation Water Unit Wastewater Unit Water Demand Wastewater Generation Land Use Units Demand' (gpd) Generation (gpd) Low Density 53 du 436 gpd/du. 23,100 268 gpd/du 14,200 1 Residential Second Units 6 du 156 gpd/du 900 172 gpd/du' 'A0 Totals 59 du - 24,000 - 150,200 Notes:_a From Table 12-1,Specific Plan I Il(EDAW,2005a)_ gpd=gallons per day. du=dwelling unit. "From Table 13-1,Specific Plan III(EDAW,2005a),with conservation. L °Unit wastewater generation rate is the same or more than unit water demand rate,which is impossible. Adequate WTP and WWTP capacity; water mains, storage tanks,pump stations, and water distribution pipelines; and sanitary sewers would all be constructed to serve the proposed project before the residences could be occupied. Pipelines would be extended south from { neighborhoods in which they are currently installed along Central Parkway and F Street (as designated on the tentative map prepared by Siegfried Engineering, 2006). Construction of utility infrastructure within the project site would occur prior to paving the streets and completing the houses and buildings. The sanitary sewer and storm drain would exit the project site via a 15-foot wide easement between two lots at the north end of Court B: These utility improvements have been subjected to previous separate environmental impact assessments as required by CEQA including the SPIIIEIR. These assessments have identified impacts that may be potentially significant and proposed mitigation measures to reduce the impacts to less-than-significant levels. Therefore,a less-than-significant impact would occur with respect to construction and expansion of water and wastewater facilities to serve the proposed project. 111 4-82 k