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5.0 Environmental Analysis 5.2 Biological Resources <br />Avion Project SEIR <br />Page 5.2-10 <br />5.2.4.2 Impacts <br />a. Vegetation Communities <br />Project grading would impact coastal sage scrub, southern mixed chaparral, non-native grassland, <br />and disturbed land both inside and outside of the MHPA (Table 5.2-4). The project proposes to <br />implement Alternative Compliance measures to traditional brush management zones that involve a <br />reduction in brush management zone (BMZ) 1 limits. By reducing the BMZ 1 limit and providing a <br />non-combustible wall between BMZ 1 and BMZ 2, the overall impact to vegetation is reduced as all <br />BMZ 1 impacts would be located within the grading limits. The majority of the BMZ 2 impacts are <br />also located within the grading limits; however, 1.32 acres of BMZ 2 impacts to southern mixed <br />chaparral lie outside of the grading limits primarily on the western side of the project area <br />(Figure 5.2-3). The BMZ 2 impacts are considered “impact neutral” and involve only minor thinning, <br />trimming, and pruning of vegetation. <br />Table 5.2-4 <br />Impacts to Vegetation Communities and Land Cover Types <br />(acres) <br />Vegetation Communities/ <br />Land Cover Types <br />Permanent Impact1 Construction Zone Impact2 <br />Total <br />Inside <br />MHPA3 <br />Outside <br />MHPA Inside MHPA <br />Outside <br />MHPA <br />Coastal Sage Scrub 0 0.53 0 0.03 0.56 <br />Southern Mixed Chaparral 0 13.04 0 0.10 13.14 <br />Non-native Grassland 0 1.33 0 0.17 1.50 <br />Freshwater Marsh 0 0 0 0 0 <br />Disturbed Land 0 0.35 0 0 0.35 <br />TOTAL 0 15.25 0 0.30 15.55 <br />1Includes all Brush Management Zone 1 impacts. <br />2Construction Zone impact area refers to area needed for remedial work to construct the <br />manufactured slopes (see Figure 5.2-3). <br />3Assumes MHPA Boundary Line Adjustment approved <br /> <br />b. Sensitive Plants <br />No sensitive plant species were observed on the project site and none are expected to occur due to <br />lack of appropriate habitat and/or soil conditions. <br />c. Sensitive Wildlife <br />General Wildlife: Direct impacts are anticipated to occur to small mammals and reptiles with low <br />mobility during the grading of the project site. A biological monitor would be required to be present <br />on-site during grading to preclude any avoidable/known impacts. Birds which are not nesting are <br />expected to be able to avoid being impacted.