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46 <br />The LOA delineation determined that there are four seasonal wetlands and four intermittent <br />drainage channels on the site (Figure 7). Only Seasonal Wetland 4 in the western portion of the <br />site near Alisal Street (0.45 acres) and Drainage 1 (205 linear feet) in the northern portion of the <br />site which is a tributary to Sycamore Creek appear to be hydrologically connected to other <br />waters of the U.S. and therefore would be considered jurisdictional by USACE. The other <br />hydrologic features appear to be isolated and therefore not considered jurisdictional by USACE, <br />however, all the wetlands and channels of the site, whether they are isolated or not, would be <br />considered jurisdictional by the RWQCB. The on-site channels would also be considered <br />jurisdictional by CDFW to the top of the bank. <br />Most of the drainages and wetlands of the site occur in areas proposed as open space and will not <br />be impacted by the project; however, Isolated Wetland 2 (0.02 acre) occurs in an area proposed <br />for bank stabilization and we understand that Seasonal Wetland 4 will likely be temporarily <br />impacted as a result of trenching for a pipeline to convey stormwater from a proposed onsite <br />detention basin and that possibly a small area of the wetland could also be permanently impacted <br />by construction of an emergency vehicle access road, as the designs and locations of these latter <br />project elements were not yet clearly defined at the time of preparation of this report. We would <br />estimate that trenching for the stormwater pipeline and the EVA would result in less than 0.02 <br />acre of temporary disturbance and 0.1 acre of permanent disturbance, respectively.