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1 Project Information <br /> Project/Site Name: Riverside Development— Phase 2 <br /> Street/Location: 625 Riverside Road <br /> City: Everett State: WA Zip code: 98201 <br /> Receiving waterbody: Snohomish River <br /> 1.1 Existing Conditions <br /> Total acreage (including support activities such as off-site equipment staging yards, material <br /> storage areas, borrow areas). <br /> Total Acreage 4.70 <br /> Disturbed Acreage: 4.70 <br /> Existing Structures: 0 <br /> Landscape: 0 <br /> Topography: Small mound in the center of the site creates gradual slope west to Riverside <br /> Road, and east toward the Snohomish River. <br /> Drainage Patterns: Surface sheefflow to city system and Snohomish River. <br /> Existing Vegetation: None. Site has been previously cleared and grubbed. <br /> List of known impairments for 303(d)or Total Maximum Daily Load (TMDL)for the receiving <br /> waterbody: The Snohomish River was on the 1998 303(d) list for temperature. <br /> Critical Areas: Floodway, fringe area, seismic hazard area. <br /> Table 1 includes a list of suspected and/or known contaminants associated with the construction <br /> activity. See Appendix G for contaminant location map and contaminant location. <br /> Table 1 —Summary of Site Pollutant Constituents <br /> Constituent Location Concentration <br /> (Pollutant) (Remediation Area) Depth (mg/kg) <br /> Total cPAHs 7-2A, 7-2B Groundwater Table 5.9 <br /> Total PHBs 7-2A, 7-2B, 10-2 Groundwater Table 200 <br /> TPH- D, -O 7-2A, 7-2B, 8-1, 10-1, 10-3A,B,C Groundwater Table 15,000-83,000 <br /> Arsenic See map Appendix G 1,250 <br /> Page 14 <br />