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Unlike the proposed project,this alternative would result in no impact associated with tree removal because the approximately 200 mature trees along both sides of Grant Line Road(see Figure 4.10-2 in Section 4.10,`Biological Resources")would not be removed(because Grant Line Road would not be widened under this alternative). _ The scale of the above-listed impacts would be considerably smaller under the No-Project Alternative than the scale of the impacts that would occur under the proposed project because less than 1%of the project site would be affected under this alternative versus the full 815 acres of the project site under the proposed project(e.g.,most of existing on- site habitat would be retained under this alternative).[Lesser] Transportation The No-Project Alternative would include the development of 18 new residential units that would generate an estimated 13 total a.m.peak-hour trips and 18 total p.m.peak-hour trips(TJKM Transportation Consultants — 2005b).By comparison,the proposed project would include development of 2,302 residential units, 1.5 acres of neighborhood commercial,256,130 sf of office commercial, 1,507,260 sf of limited industrial,two K-8 schools,a 108.8-acre community college,and other public facilities.This development would generate an estimated 4,997 _ a.m.peak-hour trips and 5,913 p.m.peak-hour trips(TJKM Transportation Consultants 2005a). As discussed in Section 4.11,"Transportation,"the roadway network planned to accommodate buildout of the MHMP area,including the project site,has been approved as part of Specific Plan I Neighborhoods E,F,and G and/or or has been proposed as part of the proposed project(e.g.,widening of Grant Line Road from Hansen Road to I-205,further widening of Mountain House Parkway from Mascot Boulevard to I-205).For this reason,buildout under the MAW is self-mitigating with respect to all arterials except Altamont Pass Road,because adequate roadway improvements would be provided to mitigate significant level-of--service(LOS)impacts on these arterials. However,traffic from buildout of the proposed project would contribute to unacceptable LOS conditions on the local freeways and Altamont Pass Road.These traffic impacts would be significant and unavoidable. — Although the No-Project Alternative would result in the generation of 13 a.m.peak-hour and 18 p.m.peak-hour trips,it is likely that these trips would have no measurable effect on arterial and freeway LOS.Therefore,no impact would _ occur.If some measurable effect on arterial and freeway LOS were to occur under this alternative,this alternative would still have far lesser traffic impact than the proposed project because it would add less than I%of the trips to be generated under the proposed project to the local arterial and freeway systems.[Lesser] Air Quality The No-Project Alternative would include development of 18 residential units on approximately 7 acres. Because of the size and type of this development, and because this development would be spread out over 18 separate parcels of the project site and likely not occur all at the same time(if at all),this development would generate marginal and less-than-significant construction and operational emissions and no toxic air contaminant(TAC) — emissions or odors.By comparison,the proposed project would generate: significant temporary construction emissions of criteria pollutants; _ • significant and unavoidable TAC emissions, specifically from diesel exhaust during construction; • significant odors; • less-than-significant local mobile-source carbon monoxide(CO)emissions; and _ significant and unavoidable long-term regional emissions of criteria pollutants.[Lesser] Noise Development under the No-Project Alternative would generate minor and less-than-significant short-term,temporary construction noise,minor and less-than-significant long-term traffic noise,and no stationary source noise.Because future predicted noise levels on the project site would be affected to a substantial degree by traffic generated on EDAW College Park at Mountain House Specgic Plan 111 Draft EIR — Alternatives to the Proposed Project 5-8 San Joaquin County