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City of Everett 01 11 00 - 11 <br />Port Gardner Storage Facility – Facility Construction Package WO# UP-3525 <br /> <br />01 11 00 - 11 SUMMARY OF WORK <br />Category 2: Sensitive information <br />Category 2: For official use only / disclosure permissible by law. <br />b) Fabrication, programming, testing, and installation of custom <br />control panels, including Operator Interface Terminal (OIT) <br />panel. <br />6) Site Civil <br />a) Excavation and fill for wet well construction. The project site is <br />known to have areas of high ground water therefore the LS46 <br />excavation work will require. See Volume 7 Attachment B, <br />Geotechnical Engineering Report, for a description of ground <br />water conditions. <br />b) Subgrade construction includes implementation of trench safety <br />systems and dewatering. <br />1. The project site is known to have areas of contaminated <br />soils. Testing will be required for excavated materials. If <br />contaminants are found, excavated materials will require <br />hazardous waste disposal. See Floyd Snider Utility Property <br />Cleanup Action Plan Memorandum provided in the Volume 7 <br />Attachment E and 02 61 00 Removal and Disposal of <br />Contaminated Soils for additional information. <br />2. Dewatering activities require sampling and laboratory <br />analysis as needed to maintain discharge permit <br />compliance. <br />c) Re-grading and paving of site adjacent to LS46 following <br />completion of lift station construction activities. <br /> <br />10. Area 50 Flow Distribution Structure <br />a. Area 50, Flow Distribution Structure, repurposes the existing <br />distribution box located between the Area 35 and 55 secondary clarifier <br />structures. Following completion of the proposed improvements, this <br />structure will route untreated stormwater from the Area 35 Equalization <br />Basin to the Area 50 Effluent Pump Station. In addition, this structure <br />will divert flow from Area 30, Primary Storage, to Area 55 Secondary <br />Storage and Area 55 to Area 50 Effluent Pump Station. Modifications <br />to this existing structure include process mechanical improvements, <br />electrical, and instrumentation and controls. <br />1) Structural <br />a) Infill of the existing Parshall flume at the Area 50 Flow <br />Distribution Structure. <br />2) Process Mechanical <br />a) The Area 50 Distribution Structure include installation of size <br />electrically actuated slide gates. <br />b) Installation of a 24-inch diameter pipe connecting two of the <br />structures internal chambers. <br />c) Replacement of existing mechanical couplings on the above <br />grade pipelines connecting the clarifiers to the distribution <br />structure.