SAUSALITO-MARIN CITY SANITARY DISTRICT MISCELLANEOUS UPGRADES PROJECT. Addendum No. 2

Transcription

1 SAUSALITO-MARIN CITY SANITARY DISTRICT MISCELLANEOUS UPGRADES PROJECT Addendum No. 2 The following shall modify the Contract Documents. The work shall be accomplished in accordance with such modifications. It is required that this addendum be attached to the Specifications. This addendum contains pages, including attachments. IMPORTANT: Receipt of this Addendum must be acknowledged in the space provided on the Bid form when your bid is submitted. Failure to acknowledge receipt of this addendum may constitute grounds for rejection of the bid. Addendum Items: Item 2.: Item 2.2: The project Bid Form shall be replaced with the Bid Form provided in this Addendum #2 as Bid Form (Rev. ) to include additional work at the District s Scotties Pump Station (Item 7). Installation of a Bypass Pump Connection at the SMCSD s Scotties Pump Station: Work shall be as specified in the attached documents, listed below:. Location Map for Scotties Pump Station 2. Drawing: Portable Bypass Pump Connection at Scotties Sewer Pump Station 3. Drawing Notes 4. Detail P-02: Pipe Thrust Block 5. Specification Section 54: Check Valves 6. Specification Section 55: Gate, Globe, and Angle Valves Contractor shall prepare and submit Traffic Control and Storm Water Pollution Prevention Plans (SWPPP) to the City of Sausalito as required for an encroachment permit. Permit fees shall be paid by the District. Pricing for this work shall be included on the project bid form as Bid Item No. 7. This Addendum No. 2, including attachments, shall become part of the Contract and all provisions of the Contract shall apply thereto. Miscellaneous Upgrades Project Page of Addendum 2

2 MISCELLANEOUS UPGRADES PROJECT BID FORM (Rev. ) Item No Estimate Quantity Unit Description Bid Lump sum The work includes furnishing all labor, materials and equipment for the MISCELLANEOUS UPGRADES PROJECT including but not limited to the following 5 work tasks and appurtenant work as needed to construct a complete and operational project as specified in these Contract Documents: ) Replacement of four (4) air relief valves on the District s force main. 2) Structural foundation support upgrades for the District s conference room and storage containers. 3) Collector system upgrades in each of the District s two (2) secondary sediment tanks. 4) Exterior painting of District buildings. 5) Pump and piping replacement at the Tamalpais Community Services District s (TCSD) Bell Lane pump station. 6) Wet well modifications to the City of Sausalito s Spinnaker pump station ) Installation of a bypass pump connection at the District s Scotties Pump Station. 7. TOTAL BASE BID All work incidental thereto and connected therewith for Bid Items through 7: $ Sausalito-Marin City Sanitary District Miscellaneous Upgrades Project General Conditions Bid Form (R)

3

4

5 Portable Bypass Pump Connection At Scotties Sewer Pump Station DRAWING NOTES:. Not all facilities and features are shown on the drawings. Contractor shall field verify location, alignment and elevations of existing piping and appurtenances prior to beginning construction. Coordinate any necessary changes with owner. 2. Restore paving, landscaping and all other facilities damaged during construction to prior condition. 3. Field verify all depths prior to construction. 4. Camlock connection shall be 6 female, aluminum, and include a male plug. 5. Base Elbow shall be provided for vault pipe support. Anchoring of base elbow shall be by cast in or epoxied 5/8 min diameter 36 SS all-thread with 4 min embedment. 6. Precast Utility Box shall be sized to accommodate valves and camlock as shown and with a minimum wall clearance of 6 on all but penetrating sides. 7. Vault shall be supported by a 6 cast in place concrete slab with 2 OC EW or precast concrete slab per utility box manufacturer s design. 8. All disturbed or replaced soils shall be compacted to 90%. Disturbed soil below the vault shall be compacted to 95%. 9. Tie-in to existing 4 HDPE force main shall be by HDPE branch saddle with flange adapter and stainless steel backing ring. 0. Provide worm gear operator with 2 square nut for the 6 saddle valve. Buried valve shall be wrapped and a 4 Sch 80 PVC pipe used to provide access from grade. A pedestrian rated Christy box or equal shall be use to conceal the top of the riser pipe.. All hardware shall be 36 SS, including plug valve and check valve bolts. 2. All new piping shall be flanged ductile iron with a min. pressure rating of 50 PSIG. 3. All new piping shall be coated with high solids epoxy in accordance with Section 0990.` 4. Plug and check valves shall be as specified in Section 54 and Section Provide product submittals for utility boxes, coatings, piping, and valves. Submittal approval is required prior to purchasing these materials. 6. Thrust block detail P-02 shall apply to all T s and elbows other than base elbow.

6

7 SECTION 54 CHECK VALVES PART GENERAL.0 SUMMARY A. Section includes:. Swing check valves..02 REFERENCES A. American Society of Mechanical Engineers (ASME):. B6. - Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 25, and 250. B. American Water Works Association (AWWA):. C508 - Standard for Swing-Check Valves for Waterworks Service 2 Inch Through 24 Inch (50-mm Through 600-mm) NPS. C. ASTM International (ASTM):. A 26 - Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe Fittings. 2. A 33 - Standard Specification for Stainless Steel Spring Wire. 3. A Standard Specification for Ductile Iron Castings. 4. B Standard Specification for Nickel-Chromium-Iron-Molybdenum-Copper Alloy Plate, Sheet, and Strip. 5. B Standard Specification for Copper Alloy Sand Castings for General Applications. D. NSF International (NSF):. 6 - Drinking Water System Components - Health Effects..03 SYSTEM DESCRIPTION A. Design requirements:. Check valves: When not otherwise specified as indicated on the Drawings, provide check valves suitable for service as follows: a. In either horizontal or vertical position. b. Suitable for service working pressures up to50 pounds per square inch gauge..04 SUBMITTALS A. Submit the following information:. Product data. 2. Certificates: a. General purpose AWWA check valves: ) Affidavit of compliance attesting valves provided comply with all provisions in accordance with AWWA C508. July B00 C:\KEVIN_DATA\Pump Station Reliability Improvements\BID SET\Specs\Tech Specs\54.docx

8 3. Operation and maintenance data. PART 2 PRODUCTS 2.0 SWING CHECK VALVES A. Valves /4 inch through 3 inch:. Manufacturers: One of the following or equal: a. Crane Valve Company, Number 36. b. Lunkenheimer Company, Figure 554Y. 2. Valve design: a. Threaded joints. b. Y-pattern body with integral seat. c. Hinged disc. d. Access to valve seat for regrinding without disassembly of piping. 3. Materials: a. Body, cap, hinge, and disc: Bronze. B. Valves 4 inch through 24 inch:. Manufacturers: One of the following or equal: a. Kennedy, Figure 06LW. b. Mueller Company, Model A c. M&H, Model Valve design: a. In accordance with AWWA C508. b. Constructed to permit top entry and removal of internal components without removing the valve. c. Equipped with outside lever and weight. ) Locate lever and weight on side of valve indicated on the drawings. Position of lever and weight may require customization. d. Coordinate valve design with installation indicated on the drawings. 3. Materials: a. Body: Cast iron, ASTM A 26 Class B. b. Disc: ) 4-inch valves: Bronze. 2) 6 inches and larger valves: Bronze faced. c. Hinge pins: Stainless steel. PART 3 EXECUTION 3.0 INSTALLATION A. Install valves as specified in the manufacturer s instructions ADJUSTING A. Adjust weight on swing check valves to affect proper closing action on equipment shutdown. END OF SECTION July B00 C:\KEVIN_DATA\Pump Station Reliability Improvements\BID SET\Specs\Tech Specs\54.docx

9 SECTION 55 GATE, GLOBE, AND ANGLE VALVES PART GENERAL.0 SUMMARY A. Section includes: Gate, globe, angle, needle and hose valves..02 REFERENCES A. American Society of Mechanical Engineers (AMSE). B. American Water Works Association (AWWA):. C Resilient-Seated Gate Valves for Water Supply Service (Includes Addendum C509a-95). 2. C55 - Standard for Reduced-Wall, Resilient-Seated Gate Valves for Water Supply Services. 3. C Protective Interior Coatings for Valves and Hydrants. C. ASTM International (ASTM):. B 98 - Standard Specification for Copper-Silicon Alloy Rod, Bar, and Shapes..03 SUBMITTALS A. Shop drawings: Submit the following information:. Product Data. 2. Certificates: a. General purpose AWWA gate valves: ) Proof-of-Design Tests: Certified statement that proof-of-design tests were performed and all requirements were successfully met. 2) Affidavit of compliance attesting valves provided in accordance with all provisions of AWWA C509 or AWWA C55. b. Interior epoxy coatings: Affidavit of compliance attesting that epoxy coatings applied to interior surfaces of valves and hydrants comply in accordance with all provisions of AWWA C Operation and Maintenance Data. PART 2 PRODUCTS 2.0 GATE VALVES A. Gate valves aboveground:. Valves less than 3 inches in size for clean water and air service: Manufacturer's standard bronze, solid wedge disc, rising stem, screwed end, Class 50 pounds: a. Manufacturers: One of the following or equal: ) Crane, Figure 43. 2) Jenkins, Figure 47. July B00 C:\KEVIN_DATA\Pump Station Reliability Improvements\BID SET\Specs\Tech Specs\55.doc

10 3) Lunkenheimer Company, Figure Valves 3 inches in size and larger: a. Resilient wedge type in accordance with AWWA C55. b. Flange, iron body, and bonnet rated for 200 pound working pressure. Provide O-ring seal between valve body and bonnet. c. Ductile or cast iron wedge encapsulated in nitrile rubber and capable of sealing in either flow direction. d. Bronze stem with double or triple O-ring or braided packing stem seals. e. Rising stem configuration with handwheel diameter sized to allow opening of valve with no more than a 40-pound pull. f. Coat interior and exterior surfaces of valve body and bonnet with fusion-bonded epoxy in accordance with AWWA C550. g. Manufacturers: One of the following or equal: ) M&H/Kennedy Valve Company. 2) Mueller. 3) American Flow Control, Series B. Gate valves underground:. Resilient wedge type in accordance with AWWA C Iron body, resilient seat, non-rising stem, double O-ring stem seal. 3. Ductile or cast iron wedge encapsulated in nitrile rubber and capable of sealing in either flow direction. 4. Bronze stem with double or triple O-ring or braided packing stem seals. 5. Coat interior and exterior surfaces of valve body and bonnet with fusionbonded epoxy in accordance with AWWA C Valve operator: Provide standard AWWA 2-inch operating nut, matching valve key, and valve box for operating stem. 7. Manufacturers: One of the following or equal: a. M&H/Kennedy Valve Company. b. Mueller Company. c. American Flow Control GLOBE AND ANGLE VALVES A. General purpose globe and angle valves:. Valves 3 inches and smaller: a. Manufacturers: One of the following or equal except in welded steel piping: ) Crane, No. Globe or No. 2 Angle. 2) Lunkenheimer Company Figure No. 240 Globe or No. 24 Angle. b. Design: ) Valve: Class 25 threaded ends, rated for 250 degrees Fahrenheit at pressure of 70 pounds per square inch. c. In Welded steel piping: One of the following or equal: ) Crane, No ) Lunkenheimer Company, Figure No. 23; or equal with flanged ends. 2. Valves larger than 3 inches: a. Manufacturers: One of the following or equal: ) Crane, No ) Lunkenheimer Company, Figure No. 23. July A0 C:\KEVIN_DATA\Pump Station Reliability Improvements\BID SET\Specs\Tech Specs\55.doc

11 2.03 NEEDLE VALVES A. Manufacturers: One of the following or equal:. Powell, Figure No Lunkenheimer Company, Figure No. 906-BS or No. 907-BS. 3. Crane No. 88 or No HOSE VALVES A. Hose valves:. Manufacturers: a. Globe threaded valve: One of the following or equal: ) Crane, No. 7TF. 2) Stockham, Figure No. B22T. b. Angle threaded valve: One of the following or equal: ) Crane, No. 7TF. 2) Stockham, Figure No. B222T. 2. Design: a. Valve: Globe or angle valve with threaded ends size /8 inch to 3 inches in diameter, size as indicated on the Drawings. b. Disc: Renewable, made of Teflon or Buna-N. c. Threaded ends, rated for a pressure of 200 pounds per square inch. PART 3 EXECUTION 3.0 INSTALLATION A. Install valves in accordance with manufacturer s instructions. END OF SECTION July B00 C:\KEVIN_DATA\Pump Station Reliability Improvements\BID SET\Specs\Tech Specs\55.doc