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Draft Supplemental Environmental Impact Report Page IV.F-3 Forward Inc. Landfill 2018 Expansion Project development areas consist of developed landfill-related land uses(which are largely graded and devoid of vegetation). However, some non-native grassland and ruderal (i.e., weedy)vegetation is present on and around the proposed onsite development areas. Emergent freshwater marsh is present along the creek channel. Other than the freshwater marsh, which has colonized the altered and maintained creek channel,no native plant communities are present within the study area. Each of these habitats is discussed below. Nonnative Annual Grassland. Nonnative annual grassland is generally found in open areas in valleys and foothills throughout coastal and interior California (Holland 1986). It typically occurs on soils consisting of fine-textured loams or clays that are somewhat poorly drained. This vegetation type is dominated by nonnative annual grasses and weedy annual and perennial forbs,primarily of Mediterranean origin, that have replaced native perennial grasslands, scrub and woodland as a result of human disturbance. Scattered native wildflowers and grasses, representing remnants of the original vegetation may also be common. Nonnative annual grassland most closely conforms to the Wild Oats Grassland series as described in Sawyer,et al. (2009), and would be classified as upland, following Cowardin, et al. (1979).At the time of the 2018 site visit, only limited areas of non-native grassland were present within the proposed development areas. The proposed northeast landfill disposal area was disked and devoid of vegetation;it is expected that this area contains non-native grasses and weedy plant species between disking cycles. Large portions of the proposed relocated southeast landfill area (south of the creek)are actively used as a composing and material recovery facility, and are covered with piles and rows of compost material;these areas are generally devoid of vegetation and in their current condition are not non-native grasslands. However, non-native grasslands occur along the upper banks and bordering the South Branch of South Littlejohns Creek(within the proposed relocated southeast landfill disposal area)and within other isolated areas in the development area. Non-native grasslands also are present on portions of the landfill that are outside of the proposed development areas. Characteristic nonnative annual grasses commonly found on site include wild oats (Avena fatua), ripgut brome (Bromus diandrus), foxtail barley (Hordeum murinum),Italian rye grass (Festuca perennis), and Bermuda grass (Cynodon dactylon). Common nonnative forbs include yellow star thistle (Centaurea solstitialis), field bindweed (Convovulus arvensis),bur-clover (Medicago polymorpha),black mustard (Brassica nigra), long-beaked storksbill (Erodium botrys), broadleaf bird's-foot trefoil (Lotus corniculatus), English plantain(Plantago lanceolata), Italian thistle (Carduus p,c� nocephalus), and milk thistle (Silybum marianum) among others. Ornamental plants have also been planted on portions of the project site,including rows of oleander, patches of evening primrose,pricklypear, as well as a windrow of trees along the site's eastern boundary. In the proposed relocated southeast landfill area,there are also existing buildings and a small garden. There is a large detention basin in the southwest corner of site, which contained standing water at the time of the May 2018 site visit. There is also a drainage ditch (dry at the time of the site visits), which directs surface water during storms events to the detention basin.