Project # W06985

March 2, 2005

NOTICE TO PLAN HOLDERS
FOR CONSTRUCTION OF

 CENTRAL DISPOSAL SITE
LEACHATE & COMPRESSED LANDFILL GAS
PIPELINES PROJECT 

COUNTY PROJECT NO. W06985 

ADDENDUM NO. 2

The following changes are hereby deemed to be a part of the Contract Documents in full effect as is originally included.  Addendum No. 3 will address any unresolved issues such as the leak detection system.

GENERAL-

DIVISION I - BIDDING REQUIREMENTS

1.         Document 00100, paragraph 10. Bid Submission, DELETE  first sentence and REPLACE WITH "Sealed bids will be received by the Clerk of the Board of Supervisors, Room 100A, 575 Administration Drive, Santa Rosa CA 95403, until 3:00 p.m. as determined by the clock on the wall of the Office of the Clerk of the Board of Supervisors, on March 16, 2005, at which time they will be transferred to the Sonoma County Board of Supervisors' Caucus Room where they will be publicly opened and read aloud by the Director of Transportation and Public Works, or his designee."

Any bids already submitted to meet the original bid opening date of March 3, 2005 will be returned to bidders unopened. 

RESPONSES TO WRITTEN QUESTIONS-

The responses to questions 14 through 25 were inadvertently omitted from Addendum No. 1. 

Question #14.  Bid Item # 17, PVC Check valves and valve pots; we cannot locate any of these valves on the plans.  The only check valve listed as DI check valve at the RP Tie-in. Please clarify the location of these three (3) check valves.

Answer: There are two (2) PVC check valves and one (1) DI check valve included in the project. One PVC check valve is located at each pump station on the discharge line prior to the reducer.  See Detail 1 on C501.  Will provide separate bid items for the two check valve types.

Question 15.  Bid Item # 18, Butterfly valves.  Are all butterfly valves paid for under this bid item?  The only locations are at the pump stations and flow meter vault.  Are we correct with this statement?

Answer:  All butterfly valves are paid for under Bid Item 18.  Yes, butterfly valves are located at the pump stations and at the flow meter.

Question 16.  We are requesting better clarification for the pay item limits and what they include for the pump station, flow meter vault.

Answer:  For pay limits of the pump station, see answer to question 6.  The pay limits for the flow meter vault include all work necessary to install the flow meter, vault, piping and appurtenances starting at the transition from HDPE to DI at the 8-inch TEE (for the bypass), through the flow meter, to and including the tee on the downstream side of the flow meter, before the transition back to HDPE.  Butterfly valves are paid for under the Bid Item No 18.

Question 17.  Where is the bore and jacking operation paid for?

Answer:  Bore and jack operations and the steel casing will as defined in Sections 02445, Boring and Jacking, and 02446, Steel Casing Pipe, will be paid for under Bid Item No. 8.  This includes, but not limited to, pavement removal and restoration, excavation, backfill, compaction, materials and labor needed to complete the bore & jack operations, shoring and bracing, over excavation, and control of groundwater.

Question 18.  What is the size of the hatch specified for the flow meter?

Answer:  Hatch size is shown correctly.  Width of vault is 4 feet, not 4.5 feet. Clarification is shown on the revised plan sheet C502 included in Addendum No. 1.

Question 19.  System description (Section 02532) 1.4 indicates a duplex pump station, but the controls are set up for a single.

Answer: Each pump station is a duplex pump station.

Question 20.  Pump Design Par. 1.5 & 1.6 (Section 02532) does not indicate what the suction lift will be.

Answer:  Suction for lift for pump station 1 is 17 feet. Suction for lift for pump station 2 is 20 feet.

Question 21.  Paragraph. 1.7 (Section 02532) Submittals, Part B Tasks about a basin size and cover dimensions? No basin indicated

Answer:  Pump stations will draft out of leachate ponds.  No basins will be used. Submittal on basin not required.

Question 22.  Paragraph 1.10 (Section 02532) Qualifications, C. Specifications require a licensed California Engineer to design or be under his supervision. The specified and named station was designed by licensed factory engineers in Ohio--the location of the factory.

Answer: An Ohio State License will be adequate as long as the other qualifications are met.

Question 23.  Paragraph 2.2 (Section 02532) Pumps. Motor specified as oil filled?

Answer:  Motor is not submerged.  Oil filled motor not necessary.

Question 24.  Paragraph 2.5 (Section 02532), Source Quality  Control, Part A2-3: Refers to submerged motor and pump.

Answer  Motor is not submerged, disregard.

Question 25.  Paragraph 2.5 (Section 02532), Adjusting, Part B refers to basin.

Answer: Disregard adjustment to basin.  Pump stations will draft out of leachate ponds.  No basins will be used.

The information provided is not considered a material change per Section 4104.5 of the Public Contracts Code.

Please fill out the Addendum section of the Bid Form [Division I, Document 00400, Page 1, 3(a)] acknowledging receipt of the Addendum No. 2.

DAVID D. KNIGHT, DIRECTOR
DEPARTMENT OF TRANSPORTATION
AND PUBLIC WORKS

  Alex Sebastian                             
Alex Sebastian, Civil Engineer