THE METROPOLITAN SEWER DISTRICT OF …msdgc.org/cip/2005/downloads/adden4_5565p2.pdfPage 3 of 18...

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THE METROPOLITAN SEWER DISTRICT OF GREATER CINCINNATI CINCINNATI, OHIO 45204

MILL CREEK WWTP INCINERATOR REPLACEMENT, PHASE 2

CONTRACT 68 PROPOSED SANITARY SEWER NO. 5565

CIP. NO. 2004-10

ADDENDUM NO. 4

March 28, 2007 This addendum will only be distributed via e-mail, but will remain available for viewing on the MSD website at www.MSDGC.org. No hard copy will follow. Any questions you may have on the information contained in this addendum should be directed to the MSD Project Manager, William Lutz at (513) 244-5102. NOTE: Please be sure to enter the TOTAL NUMBER of Addenda issued on the Contract contained in the Bidding Booklet prior to submitting your bid. The attention of all bidders is directed to the following additions and/or deletions to the Contract Documents.

CHANGED ITEMS are HIGHLIGHTED and UNDERLINED The Contract Documents for the above referenced project are amended and revised as follows: INVITATION TO BID BOOKLET COVER (VOLUME I, II, III and IV)

1. REPLACE “BIDS TO OPEN AT 1:30 PM ON: 4/10/2007” with the following:

“BIDS TO OPEN AT 1:30 PM ON: 4/17/2007”

VOLUME I 1. Legal Notice, page 3:

REPLACE “SEALED BIDS will be received at the Metropolitan Sewer District of Greater Cincinnati (MSDGC): UNTIL 1:30 PM, on Tuesday, April 10, 2007” with the following: “SEALED BIDS will be received at the Metropolitan Sewer District of Greater Cincinnati (MSDGC): UNTIL 1:30 PM, on Tuesday, April 17, 2007”

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2. Instruction to Bidders, page 8, Contract Award:

REPLACE the following sentence added by Addendum 2 “The following post bid submittal is required before award of contract: Subcontractor Contract Bond as required in Section 11920, 3-6.” with the following: “The following post bid submittal is required within ten (10) business days after execution of Subcontract between the Contractor and the Fluid Bed Incinerator System Supplier: Subcontractor Contract Bond as required in Section 11920, 3-6.”

3. Materials and Equipment Offerings, page 201:

REPLACE Materials and Equipment Offerings, page 201, with the attached. Note the Part 1 Contractor must provide substitution amounts ($) for noted Specification Section 11920 Substitutions for his bid to be responsive.

VOLUME II – DETAILED PROVISIONS 1. Section 09940, Schedule 09940_1, page 3:

REMOVE row for Room # “350 Stair”

2. Section 09940, Schedule 09940_1, page 4:

REMOVE row for Room # “370 Stair”

3. Section 09940, Schedule 09940_1, page 4:

REMOVE row for Room # “375 Stair” 4. Section 09940, Schedule 09940_2, page 1:

REMOVE “P-1/3” for Iron and Mild Steel A. Submerged, 2. Nonpotable Primer

5. Section 09940, Schedule 09940_2, page 1: ADD “F-2/8” for Iron and Mild Steel A. Submerged, 2. Nonpotable Finish Coat No. 3

6. Section 11640, page 3, paragraph 1-2.08, last sentence:

REPLACE “Oil shall be used for the lubricant on the centrifugal type exhauster, and grease shall be used for the lubricant on regenerative type exhauster.” with the following: “Grease or oil shall be used for the lubricant on the centrifugal type exhauster, and grease shall be used for the lubricant on regenerative type exhauster.”

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7. Section 11640, page 6, paragraph 2-2:

REPLACE “Maximum unfiltered vibration displacement (peak-to-peak), as measured at any point on the machine (mils) 1.25 (centrifugal exhauster)” with the following:

“Maximum unfiltered vibration displacement (peak-to-peak), as measured at any point on the machine (mils) 1.5 (centrifugal exhauster)”


REPLACE “Minimum ratio of critical speed to the rotative speed at any speed. 1.3” with the following: “Minimum ratio of critical speed to the rotative speed at any speed. 1.2”

9. Section 11640, 2-5.01.04, page 9, first paragraph, last sentence:

REPLACE “Bearings shall have an AFBMA L10 Life Rating of 100,000 hours at specified operating conditions and shall be oil lubricated.” with the following: “Bearings shall have an AFBMA L10 Life Rating of 100,000 hours at specified operating conditions and shall be oil or grease lubricated.”

10. Section 11640, page 16, paragraph 2-7.01: REPLACE “Pipe 2-3/8” OD, ASTM A53, Type S, standard weight Grade B, with beveled ends.” with the following: “Pipe 2-1/8” OD, ASTM A53, Type S, standard weight Grade B, with beveled ends.”

11. Section 11640, 3-3.01, page 20, first paragraph, second sentence:

REPLACE “The tests shall be performed in accordance with ASME PTC-10 Test Code for Centrifugal Compressors and Exhausters.” with the following: “The tests shall be performed based on ASME PTC-10 Test Code which shall be submitted to ENGINEER for approval prior to testing.”

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ADD the following to the Service Conditions table: DEWATERED BIOSOLIDS METALS CONCENTRATIONS Beryllium, parts per million by weight dry (ppmwd) Mercury, ppmwd Lead, ppmwd Arsenic, ppmwd Cadmium, ppmwd Chromium, ppmwd Nickel, ppmwd

0.16 1.15 57.9 0.26 4.41 91.7 84.9

13. Section 11920, pages 11 and 12:

REPLACE pages 11 and 12 with attached.

14. Section 11920, page 18, paragraph 2-8.02:

REMOVE “Type Positive displacement, multi-element gear type”

15. Section 11920, page 23, paragraph 2-12.03: REPLACE “Tubular expansion joints Inconel 625 – Bellows, Incoloy 800H – Sleeves” with the following: “Tubular expansion joints Alloy 20, Inconel 625** – Bellows, Incoloy 800H – Sleeves”

16. Section 11920, page 23, paragraph 2-12.03: REPLACE “Tube bundle expansion joint Inconel 625 – Bellows, Type 316L Stainless Steel - Sleeve” with the following: “Tube bundle expansion joint Alloy 20, Inconel 625** – Bellows, Type 316L Stainless Steel - Sleeve”

17. Section 11920, page 23, paragraph 2-12.03: REPLACE “Tubes Inconel 625” with the following: “Tubes Alloy 20, Inconel 625**”

18. Section 11920, page 23, paragraph 2-12.03: REPLACE “Upper tube sheet (hot) Inconel 625” with the following: “Upper tube sheet (hot) Alloy 20, Inconel 625**”

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ADD the following at the end of paragraph 2-12.03: “** Inconel 625 shall be included in the “Proposed Substitution” bid listed on the Material and Equipment Offerings sheet in Volume I. Alloy 20 shall be included in the Base Bid.”

20. Section 11920, page 32, paragraph 2-14.06, third sentence: REPLACE “Expansion joints subjected to temperatures in excess of 750 F (400 C) shall be constructed of Inconel Alloy 625 and refractory lined.” with the following: “Expansion joints subjected to temperatures in excess of 750 F (400 C) shall be constructed of Alloy 20 or Inconel Alloy 625** and refractory lined.”


ADD the following after the first paragraph: “** Inconel 625 shall be included in the “Proposed Substitution” bid listed on the Material and Equipment Offerings sheet in Volume I. Alloy 20 shall be included in the Base Bid.”

22. Section 11920, page 39, paragraph 3-6 ADD the following paragraph to the end of Paragraph 3-6:

“The Subcontractor Contract Bond to be provided by the SUPPLIER shall not include SUPPLIER’s warranty obligations associated with the operation and integrity of the refractory arch support, including repair or replacement of tuyeres, which are covered by a separate 2 year performance warranty bond required by Section 11920, Paragraph 3-7.”

23. Section 11920, Subcontractor Contract Bond

REPLACE the Subcontractor Contract Bond with the attached.

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VOLUME III – DETAILED PROVISIONS 1. Section 13214, page 10:

ADD the following paragraph: “2-6. FUEL OIL TANK PUMP. The fuel oil tank pumps shall be designed to fill the fuel oil tank (IFOT-1) and sub base primary fuel tank. The fuel oil tank pumps shall be the product of the same manufacturer and shall be as manufactured by Roper, Viking, or equal.

2-6.01. Design Requirements. The fuel oil tank pump shall be designed based on the following criteria:

Number 2 Designation IFOP-4A, 4B Drive Direct Maximum capacity, gpm 15 Minimum discharge pressure, psi 10 Maximum Motor size, hp 2 Electrical supply, volts/phase 480/3

The pump shall be complete with AFD, electric drive motor, flexible shaft coupling, coupling guard, base, controls, spare parts, and all other accessories or appurtenances indicated on the drawings, specified, or otherwise required for proper operation. The motor shall conform to the requirements of Section 16220 – General Purpose Induction Motors.

2. Section 15066, 2-2, page 3, first sentence:

REPLACE “Piping system shall be a minimum Schedule 80 wall thickness suitable for a working pressure of 2,500 psi and a nominal safety factor of 3.” with the following: “Piping system shall be a minimum Schedule 80 wall thickness suitable for a working pressure of 1,200 psi and a nominal safety factor of 4.”

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3. Section 15066, 2-6, page 4, fourth paragraph, second sentence: REPLACE “The coupling system shall be designed for a working pressure of 2,500 psi for use with schedule 80 pipe.” with the following: “The coupling system shall be designed for a working pressure of 1,200 psi for use with schedule 80 pipe.”


ADD the following to the Insulation Schedule under Piping-Indoors: Sand 6 PMF1 1 [25]


REPLACE “Motors Submit the data required in Section 16220.” with the following: “Motors Submit Motor data sheets.”

6. Section 15420, page 5, 2-1.03: REPLACE paragraph 2-1.03. in its entirety with the following: “2-1.03. Motor. The motor shall be long shaft and shall be capable of operating continuously in the natural gas environment. The motor shall be rated at 20 horsepower and suitable for operation on 480 volt, 60 Hz, three-phase at 3500 rpm. The motor enclosure shall be explosion proof per NEMA Class-1, Division-1, Group-D classification. The motor shall be provided with a motor space heater sized to prevent condensation on the core and windings. Space heater shall be isolated or so located as to prevent heat damage to adjacent painted surfaces and shall be suitable for 120 volt, 60 Hz, single phase power supply. The motor shall be furnished with at least one automatic reset winding temperature switch per phase. Temperature switch contacts shall be normally closed and rated 5 amps at 120 volts ac. The contacts shall be wired in series and the ends brought out to the motor terminal box.”

7. Section 15420, 2-1.12, fifth paragraph, first sentence:

REPLACE “All warning conditions shall be combined in each panel to generate two common alarm relay contacts.” with the following: “All warning conditions shall be combined in the control panel to generate two common alarm relay contacts.”

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8. Section 15420, 2-1.12, sixth paragraph, first sentence: REPLACE “All shutdown conditions shall be combined in each panel to generate two common shutdown relay contacts.” with the following: “All shutdown conditions shall be combined in the control panel to generate two common shutdown relay contacts.”

9. Section 15420, 2-1.12, seventh paragraph: REPLACE “Each panel shall be furnished with a manual alarm reset pushbutton and all alarm conditions shall require a manual reset before the alarm condition and contact is cleared.” with the following:

“The control panel shall be furnished with a manual alarm reset pushbutton and all alarm conditions shall require a manual reset before the alarm condition and contact is cleared.”

10. Section 15420, 2-1.12, eighth paragraph: REPLACE “Each panel shall be furnished with an indicator light test pushbutton that illuminates all panel mounted lights when pushed.” with the following: “The control panel shall be furnished with an indicator light test pushbutton that illuminates all panel mounted lights when pushed.”

11. Section 15420, page 7:

ADD the following paragraph: “2-3. BYPASS VALVE. Natural gas booster system skid shall include an electric actuated three-way ball valve as indicated on the P&ID drawings. Valve shall be 6-inch diameter full port with T-Port configuration (top entry with four seats). Electric actuator shall be as specified in Section 15180. Valve shall be KTM Series E3200 or approved equal. Valve materials shall be as follows:

Body Carbon steel (A216, WCB),

150# flanged

Ball Type 316 stainless steel

Stem Type 316 stainless steel, blow out proof

Seats E-PTFE/PFA (-20°F – 300°F)

Bearing and packing rings PTFE

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VOLUME IV – DETAILED PROVISIONS 1. ADD Pre-Demolition Asbestos Inspection Report prepared by ATC Associates Inc.

attached.

DRAWINGS 1. D801:

REPLACE the strip dimension “3’-0”” along column row 4 with the following: “4’-0””

2. S304:

ADD Figure S304-1 attached. 3. S316:

ADD Figure S316-1 attached.

4. S504: ADD Figure S504-1 attached.

5. S504: ADD Figure S504-2 attached.

6. A313:

ADD Figure A313-1 attached.

7. A315:

ADD Figure A315-1 attached. 8. A318:

ADD Figure A318-1 attached. 9. P301:

REMOVE “6” ST FROM ABOVE” near column B-19.1 10. P301:

REMOVE “4” DSN, INV EL 492.67” near column B-19.1

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11. P302:

REMOVE “6” ST UP & DN” near column B-19.1 12. P303:

REMOVE section of 6” storm drain line between columns B-18.1 and B-19.1 and route 6” storm drain line east at column line B-18.1 through the wall and connect to downspout.

13. PI218:

REMOVE the two individual skid mounted local natural gas booster control panels and REPLACE with one common remotely mounted control panel.

14. E301:

ADD the following equipment designation to label the skid located near the exterior northwest corner of the Incinerator Building. The equipment is similarly shown on Drawing E302. “NATURAL GAS BOOSTER SYSTEM”

15. E301: ADD Note 5 as follows: “5. THE EXTERIOR AREA ADJACENT TO THE NATURAL GAS BOOSTER SYSTEM SKID AND EXTENDING 15 FEET IS IDENTIFIED “AREA TYPE 7A””

16. E301:

REPLACE the light fixture designation “EL1” located at column G-28 with the following: “EL2”

17. E301:

REPLACE the light fixture designation “1” located at column H-28 with the following: “18”

18. E302:

ADD Note 4 as follows: “4. THE EXTERIOR AREA ADJACENT TO THE NATURAL GAS BOOSTER SYSTEM SKID AND EXTENDING 15 FEET IS IDENTIFIED “AREA TYPE 7A””

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19. E320:

ADD a motor temperature switch (MTS) to each of the Natural Gas Booster System motors. Each motor temperature switch shall have circuit designation as follows: “:1-2/C#14”

20. E320:

REPLACE circuit “MFB5-4A:3#6,1-2/C#14,#8G,1-1/4”” with the following: “MFB5-4A:3#6,2-2/C#14,#8G,1-1/4””

21. E320: REPLACE circuit “MFB5-4C:3#6,1-2/C#14,#8G,1-1/4”” with the following: “MFB5-4C:3#6,2-2/C#14,#8G,1-1/4””

22. E320: REPLACE circuit “MFB5-4E:2-7/C#14,1-1/4”” with the following: “MFB5-4E:2-7/C#14,1-9/C#14,1-1/2””

23. E322:

ADD circuit from PLC-5-4 routed to the Natural Gas Booster System Control Panel as follows: “MFB5-4E:”

24. E906, Lighting Fixture Schedule:

Symbol 1, MTG HGT, REPLACE “AS NOTED ON PLANS” with the following: “1’-6” ABOVE DOOR UNLESS NOTED OTHERWISE”

25. E906, Lighting Fixture Schedule: ADD the following light fixture to the schedule: “SYMBOL – “18”, LAMP “70W HPSA, 6400 LUMENS”, MTG HGT – “1’-6” ABOVE DOOR”, DESCRIPTION – “70W HIGH PRESSURE SODIUM WALL MOUNTED FIXTURE, HIGH POWER FACTOR BALLAST, PHOTO-CELL CONTROL, 120V, CLASS 1 DIVISION 1 RATED”, MANUFACTURER – “HOLOPHANE #PETM-070HP-12-SY-WL”.

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26. E906, Lighting Fixture Schedule: ADD the following light fixture to the schedule: “SYMBOL – “EL2”, LAMP “13W SINGLE FLUORESCENT”, MTG HGT – “7’-6” ABOVE DOOR UNLESS NOTED OTHERWISE”, DESCRIPTION – “EMERGENCY LIGHTING UNIT, WALL MOUNTED, NICKEL CADMIUM BATTERY UNIT, 120 VOLT, CLASS 1 DIVISION 1 RATED”, MANUFACTURER – “HOLOPHANE #PETM-070HP-12-SY-WL W/ #DSHZ-P14N”.

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BIDDERS’ QUESTIONS

1. Request additional information on sheet S309. On each end of the roof it calls out “Bent 3/8” Plate” in plan. There are also some bent 3/8” Plate at the end of the rolled beams and trusses. A section is cut threw this area. Need to know how the plates on the ends are going to be fastened and if the plate needs to stick up above the top flange of the rolled beams? The bent plates in question are to the left of line 27 and to the right of line 11 just want to make sure we are looking at the same bent plates. These plates on each end will have to be burned out a sheet to match the rolled beams on the ends. Replace 3/8" bent plate with “Roof Edge Detail at North & South Ends” shown on attached Figure S316-1. Refer to page 9, item number 3 in this addendum for addition of Figure S316-1.

2. Question #21 of addendum 2 states that the existing foundation mat is at elevation 492.00. Section 2/S303 shows the new slab poured with a top of slab elevation of 492.00. The response states to take the existing mat down to 492.00. Does this mean that there is no demo for this area? Please clarify. “EL 492.00” was intended to reference the top elevation of the existing slab and not the top of the existing foundation mat. The existing slab must be removed down to the top of the existing foundation mat which is correctly shown on section 2/S315.

3. Question #22 on sheet 24 of addendum 2 states that for information on the concrete beam we are to use detail 7/S316 for construction purposes. This detail does not match the information shown on detail 20 and 24 on A904. The instruction to use detail 7/S316 would delete any exposed concrete giving the cast stone appearance in your Architectural details. Is this your intention? Please clarify. Replace detail 7/S316 with new Detail 7/S316 shown on attached Figure S316-1. Refer to page 9, item number 3 in this addendum for addition of Figure S316-1.

4. Please clarify the Crack Repair Specification Section. Is this work to pertain to any cracks in new concrete or existing? If it is for existing, please provide a quantity or sheets detailing this quantity. Concrete Crack Repair Specification, Section 03710, generally applies to areas where work will be performed under this contract including new and existing concrete.

5. Section 4/S703 shows a detail with 4 walls for the HVAC opening. This is not shown anywhere on the plan detail in either the Structural or HVAC drawings. Where is this detail in plan view? Should the HVAC walls be built as shown in detail 3/S703? Please clarify. The four walls show support for equipment to be above grade. At penetrations of HVAC duct, only the curb wall is needed as shown on the detail. If there is any equipment, then the top slab (at grade) and associated walls do apply.

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6. On the demolition of slabs (sheet D801), can we overcut the outside perimeter of the slabs to be removed? Contractor should not overcut the outside perimeter of slabs to be removed. Change the width of the strip along column row 4 on D801 from 3'-0" to 4'-0" in order to match width of the new concrete on S301 (Column Row 11 on S301). Refer to page 9, item number 1 in this addendum for modification to D801.

7. Section 11168/Schedule 09940-2, concerns regarding the System B-4 paint system for above grade piping and System A-2 for buried piping. I feel the B-4 system would be at the manufactures maximum performance capabilities if we applied two coats of Carboguard 890 @ 6 mil/ct min. I feel the A-2 system would be at the manufactures maximum performance capabilities if we applied two coats of Bitumastic 300-M @ 8 mil/ct min over a surface blasted at an SP10. The B-4 system shall be provided as specified. For the A-2 system, replace the Carboline 890 primer with a third coat of Bitumastic 300-M. Refer to page 2, item numbers 4 and 5 in this addendum for modifications to Schedule 09940-2.

8. Ash Slurry System – Section 11168 - Interior Coating (No Section Found). Often, when a slurry system pipe line is involved, special consideration may be required for additional corrosion protection by applying an interior asphaltic based coating to the interior of the carbon steel shell prior to installation of the basalt linings. Please confirm: 1) That this additional ID paint is not part of the spec. 2) That an additional corrosion barrier is not desired in this project. Provide basalt lined steel pipe as specified in Section 11168. Additional coating is not required.

9. Section 11921, are the 4”Ø truck unloading / silo fill lines to be quoted with a ceramic lining? The 4” diameter truck loading/silo fill lines shall be quoted with the ceramic lining. The truck loading/silo fill lines shall comply with the system pipe requirements as specified in Section 11921.

10. Section 11921, the spec calls for 3” Ø x 30” centerline radius ceramic lined elbows – has anyone looked at the apparent lack of space beneath the blow pots or transporters? The discharge elbow immediately following the transporter vessel may have a shorter radius elbow than specified, given the sand system supplier will guarantee the system (note that this is only for the elbow underneath the transporter vessel, all other piping system elbows shall be of long radius type as specified).

11. Section 11921, the actual language concerning the ceramic lined elbows is a bit anemic. One potential General Contractor has suggested that our standard 10ga. carbon steel construction with 1” wall ceramic linings, our proprietary bolt circle flanges and a commensurate quantity of weld-on companion flanges may be acceptable. Please comment on this point. The carbon steel pipe wall shall be constructed of materials of the same quality as specified for the system piping, including flanges and other accessories.

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12. Section 11921, there are cast iron wear resistant laterals required as part of this Sand System piping. Will the owner allow for the use of an alternate material; specifically ceramic? Ceramic lined carbon steel laterals shall follow the same specifications and quality standards as for the long radius elbows.

13. Section 11921, confirm which section of the specification we would be held accountable to for manufacturing the ceramic lined elbows. Our understanding is Sect. 2-1 "Pneumatic Conveying System Piping"; however one individual has suggested Section 2-6.01. Both paragraphs 2-1 and 2-6.01 in Section 11921 shall apply.

14. Section 11640, this section seems to imply that the blower/motor package is to include the primary and secondary separators on the skid. Is it acceptable to include the blower/motor on one skid and the primary and secondary separators supported by legs and not skidded? System supplier may provide skids as described above given the supplier and contractor coordinate supply and installation of all tubing, wiring and accessories otherwise provided as part of the skid.

15. Section 11640, this section seems to imply that items like flexible connectors, vibration isolators, inlet filter, inlet and discharge silencers, should also be mounted on the skid. These items are normally shipped loose in order to protect them during shipment and are part of the system but installed by the contractor along with contractor supplied piping to connect the filters, silencers on site. Please clarify that these items can be shipped loose for shipping protection and that the contractor is responsible for on site assembly. Items described above may be shipped loose given the pipe length between the silencer and the exhauster is coordinated by the contractor and acceptable to the system supplier.

16. Section 11640, paragraphs 1-2.08 and 2-5.01.04, please modify these paragraphs to permit grease lubricated bearings on the centrifugal exhauster. Grease or oil may be used as lubrication for the bearings on the centrifugal exhauster. Refer to pages 2 and 3, items 6 and 9 in this addendum for modifications to Section 11640.

17. Section 11640, paragraph 2-6.01, this section shall refer to an inlet filter only. An inline filter is not a silencer. Inline filters silencers are available. Provide inline filter silencers as specified to be located upstream of the equipment silencer.

18. Section 11640, paragraph 2-6.06, we don’t see any reason to install a pressure gauge on the discharge of the exhauster. Please consider deleting the pressure gauge. Provide pressure gauge as specified for the purpose of troubleshooting.

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19. Section 11640, paragraph 2-6.11, don’t see any reason to supply a check valve in the system that only has one exhauster. Please consider deleting the check valve. Include check valve as specified.

20. Section 11640, paragraph 2-8, this paragraph requires the primary separator to be equipped with a coned bottom and paragraph 2-2 indicates the primary separator will be used with a 55 gallon waste drum that is a normal design and waste removal method. This paragraph also requires the secondary separator to be equipped with a bucket bottom (dirt can with can and bail). However, drawing PI221 shows both the primary and secondary separators with coned bottoms and automatic rotary valves. Please clarify exactly what is desired as the spec language is contradictory to what is depicted on the drawing. Coned bottom separator is suitable for the primary separator to discharge into a 55 gallon drum. The secondary separator shall be provided with a bucket bottom as indicated in the specifications.

21. Section 15420 does not identify anywhere that the motorized inlet valve identified on drawing PI218 as valve 3005 is to be supplied in the gas booster skid package Scope of Supply. Sect 15420 does not refer to any other section that we can find that identifies what type of valve, materials of construction of the valve, power required, NEMA rating of the motorized actuator. Who provides this valve? The three way motorized valve is to be provided by the Natural Gas Booster System Supplier and installed on the booster skid. Refer to page 8, item 11 in this addendum for modification to Section 15420.

22. Section 15420, paragraph 2-1.12, the language in this paragraph implies in some areas that one control panel is required for the control of two gas boosters and in other areas it implies two panels are required. Drawing PI218 shows the supply of two (2) gas booster control panels (3012 & 3103). Drawing E320 shows one (1) control panel for the control of two (2) gas boosters. Please clarify how many panels are required. There should be one panel to control the two boosters. Refer to pages 7 and 8, item numbers 7 thru 10 in this addendum for modifications to Section 15420.

23. Section 15420, paragraph 2-1.12, the last paragraph reads “The control panel enclosure shall be rated NEMA Type 4 and shall be constructed from stainless steel". Drawing PI218 indicates the control panels identified as 3012 & 3013 are to be mounted on the gas booster skid. We notice that the pressure switch is mounted on the skid and is specified as NEMA 7 in paragraph 2-1.10. What is the hazardous rating of the skid that permits the control panels to be rated NEMA Type 4? Please clarify the hazardous rating of the skidded components that permits a NEMA Type 4 rating on the panel? The control panel is shown on E302 to be located remote from the gas booster skid and shall be NEMA 4, stainless steel. All skid mounted electrical components and devices mounted within 15 feet of the skid shall be NEMA 7.

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24. Sheet P401 requires us to sawcut and breakout the existing concrete floor for installation of the floor drains. What is the thickness of the concrete floor and mat at this location? If it is the same as the rest of the building we should have approximately a 4 ft. thick concrete floor/mat to cut through. Sawcut and breakout existing concrete floor for installation of the floor drains as required for sanitary drain piping shown on P401. Refer to Detail 4 on S402 for existing concrete elevations.

25. Plan sheet A503, Enlarged Toilet Plan, how tall is the east wall infill in this room? The east wall infill is to replace a door and some windows. The height of the door and frame is 7’-2”.

26. Plan sheet A908, Details F & G, are these bent plates continuous and how are they anchored to the block walls and the existing concrete desks? Please clarify. Details F/A908, G/A908, E/A907 and D/A910, the bent plates are continuous. Anchors are 3/8” expansion anchors at 24” OC.

27. Plan sheet A505 near the intersection of column lines T-16 there is a block wall at 4’-10” from the corner of the room expansion. What is the bottom elevation and what is the top elevation of this wall? The structural drawings do not even show this wall on S502. Please review and clarify. This wall is 16’-0” high. See Section 2/A313 and Detail D/A910. This wall is higher than the bent plate that ends at the wall.

28. In a review of IDI’s preliminary scope, they have included a substantial requirement for “additional” support steel. B&V’s plans do not show this steel. Will this be a change order or must we include in our base bid? All steel must be included in bid. Incinerator system supplier is required to provide some additional support steel. For example, refer to note 2 on drawing PE309.

29. P&IDs show/imply strainers, none are shown on the plan.

Strainers shown on PI207, PI211 and PI215 are to be removed. Refer to Addendum 1, pages 5 and 6, item numbers 10, 13 and 17.

30. V-3151, 3251, 3351, 3153, 3253, and 3353 are shown on the P&IDs but not

on the plans. Refer to Addendum 1, page 6, item numbers 21 and 22 for location of valves on plan drawings. Piping and valves shown for IFB-2 is typical for all three incinerators.

31. The NPW piping to the quench spray shows 4” on plan and 3” on P&ID. Also, globe in 3” not implied on plan drawings. NPW piping to quench shall be 4”. Refer to Addendum 1, pages 5 and 6, item numbers 14 and 18 for modifications to drawing PI211 and PI215. Globe valve shall be located at suitable elevation for access from nearest platform.

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32. Specification Section 11921, Paragraph 2-1, insulation and lagging required from the truck unloading to 10’ above the floor states to be installed per Section 15250, but not called out in the schedule in 15250. Insulation for sand truck unloading shall be provided as specified in Section 11920,2-1. Refer to page 7, item number 4 in this addendum for modification to insulation schedule in Section 15250.

33. Fuel Oil Tank Pumps designated IFOP-4A and IFOP-4B. Pumps shown on PI220 and PE401, but I do not find them listed nor specified in Section 11921 or 13214. Can you provide specification and designate whether they fall under the scope of supply of the Fluid Bed Incinerator System Supplier, Aboveground Fuel Storage Tank Supplier, or Contractor? Fuel Oil Tank Pumps have been added to Section 13214. The pumps shall be furnished and installed by the Part 1 Contractor. Refer to page 6, item number 1 in this addendum for modification to Section 13214.

34. Per comments made in Addendum #2, Bidders’ Questions 32 and 33. We question the requirements to insulate the compressed air (CA), given the existing plant compressed air delivery system were to connect to. Please revisit your comments as it would be our opinion the insulation of compressed air is not needed, nor common practice. Insulate compressed air piping as specified.

35. Per Section 09940 Finish Schedule, can you please direct me where to find stair 350 and stair 370? Stair 350 and stair 370 are to be removed. Refer to page 2, item numbers 1 and 2 in this addendum for modifications to Section 09940, Schedule 09940_1.

36. Section 15066 calls for a piping system working pressure of 2,500 psi and class 600 flanges. The ANSI 16.5 class 600 flanges are not rated for a working pressure of 2,500 psi, which would be a 3,750 psi test pressure (1 1/2 times the working pressure). Also, the pipe wall thickness to hold 2,500 psi would have to be thicker than schedule 80. Note: Section 15066, 3-6 notes a hydro pressure test of 1,000 psi, which is substantially lower than the operating pressure. Please advise on which pressure pipe and flanges needs to meet. The working pressure shall be 1,200 psi with a nominal safety factor of 4. Refer to pages 6 and 7, item numbers 2 and 3 in this addendum for modifications to Section 15066. A hydro pressure test of 1,000 psi is acceptable.

MATERIALS AND EQUIPMENT OFFERINGS - continued

PART 1 – GENERAL CONSTRUCTION

Section Equipment or Material Standard Selected Standard

Proposed4

Substitution Substitution4

Amount

11166 Dewatered Solids Pump Modifications Schwing Bioset (X)

$

11185 Submersible Sump Pumps Ebara Flygt

( ) ( )

$

11640 Central Vacuum System Exhauster

Gardner Denver Spencer Turbine

( ) ( )

$

Infilco Degremont2 (Inconel 625) $

Technip3 (Alloy 20) $

Technip3 (Inconel 625) $

11920 Fluid Bed Incinerators Infilco Degremont (Alloy 20) (X)

$

13530 Programmable Logic Controllers

Allen-Bradley - ControlLogix (X)

$

13990 Fire Pump System

Fairbanks Morse Auroura A-C Pump (ITT) SyncroFlo, Inc.

( ) ( ) ( ) ( )

$

15103 High Pressure Ball Valves KF Industries Inc. (X) $

15420 Natural Gas Booster System Spencer Turbine (X) $

15491 High Pressure Wash Systems

Landa Cleaning Systems (X)

$

16150 Adjustable Frequency Drives Allen-Bradley/Rockwell - Automation

(X) $

16395 Medium Voltage Motor Control Equipment

Cutler Hammer General Electric Square D

( ) ( ) ( )

$

16480 600 Volt Class Motor Control Centers

Cutler-Hammer General Electric Square D

( ) ( ) ( )

$

PART 4 – ELECTRICAL WORK

Section Equipment or Material Standard Selected Standard

Proposed Substitution

Substitution Amount

16343 4.16KV Circuit Breaker Rebuild


( ) ( ) ( )

$

16344 4.16KV Circuit Breaker Cubicle Refurbishment & Relay Door Replacement


( ) ( ) ( )

$

16480 600 Volt Class Motor Control Centers


( ) ( ) ( )

$

16491 Automatic Transfer Switch ASCO GE Zenith Controls Kohler

( ) ( ) ( )

$

NOTES: 1. For Equipment or Materials with only one (1) Selected Standard an “X” has been placed in the parenthesis.

Bidder is instructed to use the indicated equipment or material in their Bid. 2. Part 1 Contractor shall include substitution amount for Infilco Degremont Fluid Bed Incinerator Equipment

using Inconel 625 in lieu of Alloy 20. 3. Part 1 Contractor shall include substitution amount for Technip Fluid Bed Incinerator Equipment. In addition,

the Part 1 Contractor shall be responsible for any additional re-design and ancillary equipment substitution costs associated with the Technip equipment and shall deliver approvable shop drawings (including, but not limited to, all general, electrical, and mechanical work associated with the design revisions) of any re-design within ninety (90) days from the Notice to Proceed under penalty of $1,000/day liquidated damages for each day of delay beyond the 90 day milestone.

4. For a responsive bid, the Part 1 Contractor must provide substitution amounts ($) for the noted Specification Section 11920 Substitutions (see footnotes 2 and 3).

11920 - 11 - INCINERATOR REPLACEMENT

Performance Requirements

Expected Range

Performance Guarantee

Air Emissions Testing Completion Schedule Completion, maximum number of calendar days from first feed of sludge to an incinerator until Performance Test is completed and Emissions Compliance Test Report submitted to Owner

170

Air Emissions (at stack) Particulate emissions, lbs. per dry ton of solids burned PM10

B

PMTOTAL

- -

0.40 max 0.40 max

Carbon monoxide, ppmv dry and 7% O2 CO - 50 max

Nitrogen oxides, lbs. per dry ton of solids burned NOx (NO and NO2) - 2.5 max

Volatile Organic Compounds (NMHC), lbs. per dry ton of solids burned (expressed as propane) VOC - 0.90 max

Sulfur Oxides, lbs. per dry ton of solids burned F SOx - 1.2 max

Mercury (Hg), lbs. per dayC - Note G Beryllium (Be), lbs. per dayD - 0.022 max Other Metals, lbs. per dry ton of solids burned Arsenic - 3.0 E-05 max Cadmium - 1.1 E-03 max Chromium - 5.0 E-04 max Lead - 6.0 E-03 max Manganese - 6.0 E-04 maxH

Nickel - 4.0 E-03 max Selenium - 3.0 E-04 maxH Notes:

A. Dewatered biosolids conditions may vary within the ranges indicated. Performance guarantee shall be adjusted for the available biosolids tested, based on actual solids analyses including HHV of volatiles.

B. Includes filterable PM10 plus condensable particulate matter (CPM). C. No greater than 3,200 grams per day for entire facility. Mercury

emissions dependent on mercury in feed solids.

11920 - 12 - INCINERATOR REPLACEMENT

Performance Requirements

Expected Range

Performance Guarantee

D. Equivalent to 10 grams per day for entire facility. E. At same guaranteed sludge characteristics for %VS, and HHV. F. SOx emissions dependent on sulfur in feed solids. Emissions

calculated from feed solids assuming all to SOx. G. Mercury level shall not exceed level measured in feed solids. H. Dewatered biosolids metal concentrations not available for manganese

and selenium. Performance guarantee shall be minimum 98% removal for manganese and selenium.

2-3. DESIGN REQUIREMENTS. The design of each Fluid Bed Incinerator shall be suitable for satisfactory operation under all of the above conditions and performance. Design requirements are set forth as indicated in the following table.

Design Requirements

Number of incinerator trains

3

Unit designation

IFB-1,2, 3

Approximate dimensions, ft. Height of incinerator vessel, min. Top freeboard diameter, min. ID/OD Windbox diameter, min. ID/OD

37 25.5/27.75 15.25/17.6

Number of feed ports Biosolids Fuel Oil

Natural gas Sand

4 10 20 1

Pressure drop across incinerator (maximum), psi

2.9

Maximum cold face temperature of surfaces in still air at 80ºF ambient: All surfaces with external insulation and lagging, °F Other hot surfaces within building protected by barriers, °F

140 220 or less

2-4. FLUIDIZED BED REACTOR. Three (3) fluidized bed incinerators shall be furnished and installed for combustion of dewatered biosolids. Each incinerator sand bed shall be supported by a refractory arch and be capable of maintaining

11920 – Subcontractor Contract Bond -1- INCINERATOR REPLACEMENT

SUBCONTRACTOR CONTRACT BOND (As provided for in SECTION 153.571 ORC)

KNOW ALL MEN BY THESE PRESENTS: That we, the undersigned, , as principal, (Principal Name & Address) and , as sureties, (Surety Name & Address) licensed to do business in the State of Ohio, are held and firmly bound unto , hereinafter called the Obligee, in (General Contractor Name) the penal sum of $20,000,000 (twenty million dollars), to undertake the supply of Specification Section 11920 items for:

PROPOSED SANITARY SEWER NO. 5565P2, CIP No. 2004-10, MILL CREEK WASTEWATER TREATMENT PLANT INCINERATOR REPLACEMENT, PHASE 2

in accordance with Subcontract No. dated entered into between Principal and Obligee, hereinafter called the Subcontract.

The penal sum referred to herein shall be the dollar amount of the Principal’s Subcontract to the Obligee, incorporating any additive or deductive alternative proposals made by the Principal to the Obligee, which are accepted by the Obligee. In no case shall the penal sum exceed the sum of $20,000,000 (twenty million dollars). For payment of the penal sum well and truly to be made, we hereby jointly and severally bind ourselves, our heirs, executors, administrators, successors, and assigns. NOW, THEREFORE, if the said as principal, (Principal Name & Address) shall well and faithfully do and perform each and every of its obligations under such Subcontract; and indemnify the Obligee against all damages suffered by Obligee due to Principal’s failure to do so but only to the extent of Principal’s obligations under such Subcontract according to the provisions thereof and in accordance with the plans, details, specifications, and bills of material therefore; and shall pay all lawful claims of subcontractors, materialmen, and laborers, for labor performed and materials furnished in the carrying forward, performing, or completing of said Subcontract (including 1 year guarantee period); we agreeing and assenting that this undertaking shall be for the benefit of any materialmen or laborer having a just claim, as well as for the Obligee herein; then this obligation shall be void; otherwise the same shall remain in full force and effect; it being expressly understood and agreed that the liability of the Surety for any and all claims hereunder shall in no event exceed the penal amount of this obligation as herein stated.

11920 – Subcontractor Contract Bond -2- INCINERATOR REPLACEMENT

The said Surety stipulates and agrees that no modifications, omissions or additions, in or to the terms of said Subcontract or in or to the plans or specifications thereof shall in any wise affect the obligation of said Surety on its bond. FURTHERMORE, as Principal is required in Specification Section 11920, Paragraph 3-7, included as part of the Subcontract, to provide a separate 2 year performance warranty bond on the operation and integrity of the refractory arch support, it is a condition of this Subcontractor Contract Bond that Principal’s warranty obligations associated with the refractory arch support, including repair or replacement of tuyeres, in accordance with provisions of the Subcontract are specifically excluded from this Subcontractor Contract Bond. SIGNED this ___________ day of _________________________________, 20____.

Name, as Principal

Subcontractor Representative’s Signature

Subcontractor Representative’s Printed Name & Title

Surety Name

Surety Agent’s Signature & Printed Name

Surety Address

Surety E-mail Address APPROVED AS TO FORM AND SUFFICIENCY OF SURETY: Subcontractor Surety’s Agent (NOTE TO SURETY: THIS BOND MUST HAVE PROPER POWER OF ATTORNEY ATTACHED AFTER THIS PAGE)

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