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"separated" sewer collection systems and are downstream of sewer lift <br /> station discharges. Sewer manholes are generally 48-inches inside <br /> diameter and may not have existing manhole step rungs. Manhole depth <br /> from rim to pipe will normally range from 10 to 15 VF. These sites are <br /> expected to be in urban public streets or in easements. Monitors will share <br /> the same manholes as City samplers and must have provisions to interface <br /> with City samplers for flow-paced sampler operation. <br /> Task 4: Combined Sewer Overflow (CSO) monitoring (2 sites for 8 <br /> months) will be performed in trunk lines having pipe diameters ranging <br /> from 36-inches to 72-inches. CSO monitoring sites will be located within <br /> areas of the collection system that are "combined" (stormwater and <br /> sewage). Sewer manholes are generally 54-inches inside diameter or larger <br /> and may not have existing manhole step rungs. Manhole depth from rim <br /> to pipe may range from 5 to 25 VF. These sites are located near the <br /> waterfront of either Port Gardner(west) or the Snohomish River(east) and <br /> are likely to be on City-owned property, easements or private property <br /> (not in streets). Monitors will share the same manholes as City samplers <br /> and must have provisions to interface with City samplers for flow-paced <br /> sampler operation. <br /> Task 5: Sewer flow monitoring in conjunction with waste strength <br /> sampling (2 monitors for 8 months, relocated monthly) will be performed <br /> in trunk sewers having pipe diameters ranging from 8-inches to 48-inches. <br /> Monitoring sites will be located within areas of the collection system that <br /> could be either "combined" (stormwater and sewage) or "separated" <br /> (sewage only). Sewer manholes are generally 48-inches inside diameter <br /> or larger and may not have existing manhole step rungs. Manhole depth <br /> from rim to pipe will normally range from 15 to 20 VF. Although a <br /> majority of sewers and manholes are in urban streets, there are some <br /> locations where sewers are in easements or on public (City or other <br /> agencies) property. Relocation of monitors must be accomplished within <br /> 2 days. Monitors will share the same manholes as City samplers and must <br /> have provisions to interface with City samplers for flow-paced sampler <br /> operation. <br /> D. Preliminary Site Assessments <br /> The Consultant shall review the initial sites selected by the City and provide <br /> comments and recommendations regarding their suitability'for monitoring. Detailed <br /> preliminary investigations of the potential new sites for sewer monitors and rain <br /> gauge placement will be required by the sewer monitoring firm to confirm <br /> hydraulic/precipitation and communications suitability, access safety and security. <br /> These site investigations must be completed prior to the start of the project with the <br /> results being outlined in a comprehensive site documentation file that will be <br /> reviewed and approved by the City prior to initiating monitor placement. <br /> <. 0 <br /> C:\Documents and Settings\RLarson\My Documents\SFE Sales\l.0 Proposals\l.0 Proposals\08-146 City of Evertt 2 <br /> TFM\Contract Documents\SFE Global PSA EXHIBIT A-l.doc <br />