42210054 FTIG WWTP SBR 2 and Digester 2 Rehabilitation_ADDENDUM NO 3.pdf

DATE: July 5, 2024 PROJECT: Fort Indiantown Gap - WWTP SBR 2 and Digester 2 Rehabilitation

SOLICITATION / BID NUMBER: 6100061392

OPENING DATE: July 11, 2024

ADDENDUM NO. 3

GENERAL

A. This Addendum constitutes part of the Project Manual and Contract. Should conflict occur between the Project Manual and items in this Addendum or between Drawings and this Addendum, the Addendum shall govern.

B. Bidders are requested to attach a copy of this Addendum to the Project Manual in their possession.

C. Work affected by items in this Addendum shall be appropriately adjusted to accommodate these changes.

D. Sign and attach this addendum to your solicitation response. Failure to do so may result in disqualification.

E. The term “PROVIDE” as used in this Addendum and the Contract Documents means

“FURNISH and INSTALL”.

BID DOCUMENTS TO BE RETURNED – .1 GENERAL CONTRACT

Item 1 – Replace the BID FORM with the attached BID FORM_REV 1_ADDENDUM NO. 3.

SPECIFICATION CHANGES – .1 GENERAL CONTRACT

Item 1 – REPLACE SECTION 01 20 00 - PRICE AND PAYMENT PROCEDURES with the attached

SECTION 01 20 00 – PRICE AND PAYMENT PROCEDURES_REV1_ADDENDUM NO. 3

Item 2 - SECTION 46 53 53 - WASTEWATER TREATMENT EQUIPMENT

REVISE the Table under paragraph 2.2.E.4.a to read as follows:

Valve Extension Yes NO

Item 3 - SECTION 46 53 53 - WASTEWATER TREATMENT EQUIPMENT

REVISE paragraph 2.2.E.5.d. to read as follows:

“Each diffuser assembly shall include a 3" diameter wire reinforced EPDM flexible air line with quick disconnect end fittings, and a threaded flange, elbow and stainless-steel quick disconnect adapter.

All air distribution piping, gaskets, and hardware beyond the threaded flange shall be supplied by the installing contractor. The vertical track/beam shall support the lifting mechanism assembly during operation and servicing.”

Item 4 - SECTION 46 53 53 - WASTEWATER TREATMENT EQUIPMENT

REVISE paragraph 2.2.F.2.e. to read as follows

“Each diffuser assembly shall include a 3 inches diameter wire reinforced EPDM flexible air line with quick disconnect end fittings and a threaded flange, elbow and ny-glass stainless-steel quick disconnect adapters. All air distribution piping, gaskets, and hardware beyond the threaded flange shall be supplied by the installing contractor.”

Item 5 - SECTION 09 96 00 HIGH-PERFORMANCE COATINGS FOR WASTE TREATMENT TANKS

ADD the following requirements to paragraph 3.2 EXAMINATION:

B. Provide the services of a qualified inspector approved by the coating system manufacturer to inspect the surface preparation Work. Address and correct any deficiencies with the preparation Work identified and documented by the inspector.

C. Provide the services of a qualified inspector approved by the coating system manufacturer to inspect and verify the coating system application is applied in accordance with the manufacturer’s instructions and to ensure the DFT is in accordance with these specifications.

Item 6 - SECTION 09 96 00 HIGH-PERFORMANCE COATINGS FOR WASTE TREATMENT TANKS

REVISE paragraph 1.4.C to read as follows:

1.4.C. NACE No. 6/SSPC-SP13 Surface Preparation of Concrete

DRAWING CHANGES – .1 GENERAL CONTRACT

Item 1 – The DETAILS listed below and attached to this Addendum are ADDED to the BID and

CONTRACT DOCUMENTS:

DETAIL 1 – TYPICAL PIPE PENETRATION THROUGH WALL DETAIL

DETAIL 2 – TYPICAL ADHESIVE ANCHOR DETAIL

DETAIL 3 – EXISTING SLUDGE PIPING REMOVAL / REPLACEMENT PLAN

DETAIL 4 – EXISTING AERATION PIPING PLAN

BIDDERS QUESTIONS

1. Question: “No Contract Bond was included in the specifications, does one need to be submitted along with the other bid items?”

Response: Contract bond (Performance and Payment Bonds) is only required from the awarded contractor. No Bid Bond is required.

2. Question: “What is the contract number for General Construction?”

Response: There is no contract number for the General Construction.

3. Question: “Quantities of grit and liquids will be unknown after the tanks are drained. Please consider having bidders provide a unit price allowance for these items.”

Response: Pay Item 8 added to Bid Form and Section 01 20 00 in this Addendum.

4. Question: “Please provide a copy of the mix design for the original precast panels be provided with product data for additives.”

Response: Precast concrete panel manufacturer (Dutchland) stated that the mix design did NOT include any waterproofing admixtures.

Tank floors are Cast-In-Place concrete. There were no waterproofing admixtures required in the original specification for the project. A copy of the approved mix submittal is not available to determine the actual mix design including any admixtures used for the tank floors.

5. Question: “It was noted today that construction on site could not begin until the equipment is available. Is there an anticipated lead time for shop drawings, approval and delivery of the basis of design equipment?”

Response:

As of July 2024 Estimated Schedule (subject to change):

Submittals - 6 - 8 weeks from receipt of order Submittal Review / Approval - 4 - 8 weeks Shipment of Equipment - 30 - 36 weeks from receipt of approved submittals and release for manufacturing

The construction schedule and start of construction will be reviewed after Contract Award and during the Initial Job Conference. The Contractor shall minimize the amount of time the tanks are off-line and out of service. Work on site including demolition and tank coating preparation and application may begin before and in coordination with the anticipated equipment delivery date in order to have the tanks prepared for equipment installation when it arrives on site.

6. Question: “Will there be any water-tightness tests required?”

Response: No water-tightness tests will be required.

7. Question: “Will there be any inspections required by the original precast manufacturer to maintain any existing warranties for the tanks?”

Response: No inspections required by original precast manufacturer. No existing warranty.

8. Question: “We have had issues on two previous projects with a similar tank coating system due to moisture permeating behind the coating and causing it to fail. Please consider requiring the following.

1) sealing the walkways to prevent moisture wicking down through the concrete

2) provide a caulked reglet in lieu of a raw edge at the termination of the coating

3) provide some sort of additional sealant were new equipment anchors penetrate the coating”

Response:

1) Walkways will NOT be coated or sealed.

2) Terminate edge of coating in accordance with the coating system manufacturer’s requirements and installation instructions AND in coordination with and concurrence from DMVA and the original pre-cast concrete panel manufacturer (Dutchland). Coating system shall be terminated into a minimum ¼” x ¼” saw cut. This or another approved termination method includes around fixed brackets and other stationary components that cannot be removed for application. After the coating system is dry/cured the termination shall be finished with a bead of chemical resistant polysifide sealant.

3) Provide a bead of chemical resistant polysulfide sealant around all anchor penetrations in the coating system.

9. Question: “In Section 2.2 Materials; A; 1,g.;2,j.; 3,i., the specification states “Sherwin

Williams Industrial Wastewater Coating Products, or equal as approved by the Professional”.

The document does not reference any specific high-performance coating for waste treatment tanks. Please consider and submit the following Sherwin-Williams Co. Industrial Wastewater Coatings to be approved by the Professional for DMVA Project #42210054:

Section 090 96 00 High-Performance Coatings for Wastewater Treatment Tanks

3.4 COATING SCHEDULE

A. Interior Concrete Walls

1. Surface Preparation: NACE No. 6/SSPC-SP13 ICRI-CSP 5 or greater

2. Resurfacer: Concrete Resurfacing Material - Epoxy Modified Cementitious Mortar

a. SW Dura-Plate® 2300 (product data sheet attached)

3. Prime Coat: Epoxy Prime Coat – Polyamidoamine Epoxy, DFT 4.0 –

6.0 mils

b. SW Sherplate™ 600 or Macropoxy® 5500LT (product data sheets attached)

4. Finish Coat: Glass Flake Reinforced Modified Polyamine Epoxy Lining Material, DFT 14.0 – 16.0 mils

c. SW Sher-Glass® FF (product data sheet attached)”

Response: Submit information required for materials proposed for use on the project in accordance with the Contract Documents. Submittals will be reviewed in accordance with the Contract Documents.

10. Question: “Reference: Section 46 53 53 Wastewater Treatment Equipment, Paragraph

2.2.E.4.a Decanter Assembly; 1) Valve Extension is marked as "Yes" for Decant valve.”

Response: Note that the existing decant valves do not have valve extensions, and none are required.

BID FORM_REV 1_ADDENDUM NO. 3

DMVA Project#: 42210054 BID FORM - 1 FTIG Wastewater Treatment Plant – SBR 2 and Digester 2 Rehabilitation

THE BIDDER MUST TYPE/WRITE ITS TOTAL BID PRICE FOR EACH SEPARATE BID ITEM AND BASE BID ON THIS BID FORM. SEE SPECIFICATION SECTION 01 20 00 PRICE AND PAYMENT PROCEDURES FOR

BID ITEM DESCRIPTIONS.

FOR ALL GENERAL CONSTRUCTION (.1 CONTRACT):

BID

ITEM DESCRIPTION QUANTITY UNIT UNIT PRICE TOTAL PRICE

1. GENERAL CONTRACT

PROVISIONS 1 LUMP

SUM $__________________ $__________________

2. SELECTIVE DEMOLITION

– SBR 2 1 LUMP

SUM $__________________ $__________________

3. SELECTIVE DEMOLITION

– DIGESTER 2 1 LUMP

SUM $__________________ $__________________

4. COATING SYSTEM – SBR

2 1 LUMP

SUM $__________________ $__________________

5. COATING SYSTEM –

DIGESTER 2 1 LUMP

SUM $__________________ $__________________

6. TREATMENT EQUIPMENT

– SBR 2 1 LUMP

SUM $__________________ $__________________

7. TREATMENT EQUIPMENT

– DIGESTER 2 1 LUMP

SUM $__________________ $__________________

8.

SBR and DIGESTER GRIT

REMOVAL AND

DISPOSAL

60 CUBIC

YARD $__________________ $__________________

TOTAL BID

(Figure)

____________________________________________________________________________________ Dollars

(Written)

NOTE: TOTAL PRICE = QUANTITY x UNIT PRICE; TOTAL BID = SUM OF TOTAL PRICES

DMVA Project#: 42210054 012000 - 1 FTIG Wastewater Treatment Plant – SBR 2 and Digester 2 Rehabilitation

SECTION 01 20 00 - PRICE AND PAYMENT

PROCEDURES_REV1_ADDENDUM NO. 3

PART 1 GENERAL

1.1 SECTION INCLUDES

A. Schedule of Values.

B. Application for Payment.

C. Unit prices.

1.2 SCHEDULE OF VALUES

A. Submit printed schedule on Contractor’s Application for Payment.

B. Submit Schedule of Values within 15 days after date of Notice to Proceed.

C. Format: Use the unit and/or lump sum items and prices on the Bid Form to prepare the Schedule of Values.

D. Revise schedule to list approved Change Orders with each Application for Payment.

1.3 APPLICATION FOR PAYMENT

A. Submit Application for Payment in accordance with General Conditions and DMVA

Procurement and Contracting Administrative Procedures.

B. Content and Format: Use Schedule of Values for listing items in Application for Payment.

C. Submit updated bar chart style construction schedule with each Application for Payment.

D. Payment Period: As directed by DMVA Procurement and Contracting.

E. Substantiating Data: When Engineer requires substantiating information, submit data justifying dollar amounts in question. Include the following with Application for Payment:

1. Affidavits and material invoices attesting to off-Site stored products.

1.4 UNIT PRICES

A. Authority: Measurement methods are delineated in this section.

B. Take measurements and compute quantities. Engineer will verify measurements and quantities.

C. Unit Quantities: Quantities and measurements indicated on Bid Form are for Contract purposes only. Actual quantities provided shall determine payment.

1. When actual Work requires more or fewer quantities than those quantities indicated, provide required quantities at contracted unit sum/prices.

DMVA Project#: 42210054 012000 - 2

D. Payment Includes: Full compensation for required labor, products, tools, equipment, plant and facilities, transportation, services and incidentals; erection, application, or installation of item of the Work; overhead and profit.

E. Final payment for Work governed by unit prices will be made on basis of actual measurements and quantities accepted by Engineer multiplied by unit sum/price for Work incorporated in or made necessary by the Work.

1.5 UNIT PRICE SCHEDULE

A. General:

1. The items on the Bid Form for this Contract will be measured and the payment made in accordance with this Section.

2. All payments will be made at the unit prices for each item listed in the Bid Form.

3. Any items not specifically listed on the Bid Form but are necessary to complete the Work will be considered incidental to the related items listed on the Bid Form.

B. Pay Items and Measurement Methods: Pay items are listed in the order they appear on the Bid Form and unless stated otherwise, the numbers correspond to the Pay Item Numbers on the Bid Form.

1. General Contract Provisions

a. This price and payment shall constitute full compensation for providing Bonds, insurance coverage and certificates, compliance with the General Conditions, Administrative Procedures, all Division I Specification Work and requirements except where specifically described and scheduled elsewhere, mobilization, demobilization, temporary facilities, all required permits and approvals / fees and costs / inspections / testing and documentation, and compliance with requirements of permits and approvals (not measured and paid for elsewhere) required for the project by the Contract Documents, as-built Drawings and close out documentation (not measured and paid for elsewhere).

b. This item also includes costs to furnish and install the Disk Filter PLC/Interface/IO Upgrade as specified in Section 46 53 53 including startup, testing, training, and O & M documentation.

c. This item also includes costs to restore surfaces / facilities / areas of the project site disturbed during construction to their original or better condition.

d. Unit of Measurement: Lump Sum. Payment for this item will be based on and made in proportion to the overall percentage of Work completed on the project.

2. Selective Demolition – SBR 2

a. This price and payment shall constitute full compensation for all items necessary to satisfactorily disconnect and remove the existing treatment equipment and related items that is scheduled to be replaced in SBR 2 as shown on the Drawings and specified herein including but not limited to dewatering and cleaning the tank, disposal of waste materials resulting from tank dewatering / cleaning operations, protecting existing equipment / facilities / structures to remain, cleaning removed equipment that is to remain the property of DMVA, coordination with DMVA staff to store removed equipment on-site that is to remain the property of DMVA, disposal of removed items that will not remain the property of DMVA, maintaining tank dewatering operations as needed for the duration of the project, removal and storage or disposal as required of related valves /

DMVA Project#: 42210054 012000 - 3 piping / fittings, temporary disconnection of equipment and reconnection as required, and all other Work and items necessary (unless specifically measured and paid for elsewhere) to prepare the site and SBR 2 for the tank coating work and new equipment installation.

b. Unit of Measurement: Lump Sum

3. Selective Demolition – Digester 2 satisfactorily disconnect and remove the existing treatment equipment and related items that is scheduled to be replaced in Digester 2 as shown on the Drawings and specified herein including but not limited to dewatering and cleaning the tank, disposal of waste materials resulting from tank dewatering / cleaning operations, protecting existing equipment / facilities / structures to remain, cleaning removed equipment that is to remain the property of DMVA, coordination with DMVA staff to store removed equipment on-site that is to remain the property of DMVA, disposal of removed items that will not remain the property of DMVA, maintaining tank dewatering operations as needed for the duration of the project, removal and storage or disposal as required of related valves / piping / fittings, temporary disconnection of equipment and reconnection as required, and all other Work and items necessary (unless specifically measured and paid for elsewhere) to prepare the site and Digester 2 tank for the tank coating work and new equipment installation.

4. Coating System – SBR 2 satisfactorily furnish and install the coating system on the interior walls and floor in SBR 2 as shown on the Drawings and specified herein including but not limited to preparation of existing joints between precast concrete wall panels and between panels and floor including coordination with precast manufacturer and filling / treating joints as recommended by manufacturer, surface preparation and cleaning, disposal of waste materials, protection of existing facilities to remain, temporary removal and reinstallation of existing equipment and related items necessary to complete the work, application of coating system in accordance with the Drawings and Specifications and the coating system manufacturer’s instructions, proper curing and testing of coating systems as required and recommended by the manufacturer, and all other Work and items necessary (unless specifically measured and paid for elsewhere) required to provide the Coating System for SBR 2.

b. This item shall also include full compensation for all work required to remove and replace the existing sludge piping and related components; maintenance and protection of existing aeration piping OR removal / reinstallation of existing aeration piping; and preparation / sealing of all pipe / conduit wall penetrations in accordance with the coating system manufacturer’s instructions.

c. Unit of Measurement: Lump Sum.

5. Coating System – Digester 2 satisfactorily furnish and install the coating system on the interior walls and floor in Digester 2 as shown on the Drawings and specified herein including but not limited to preparation of existing joints between precast concrete wall panels and between panels and floor including coordination with precast manufacturer and filling / treating joints as

DMVA Project#: 42210054 012000 - 4 recommended by manufacturer, surface preparation and cleaning, disposal of waste materials, protection of existing facilities to remain, temporary removal and reinstallation of existing equipment and related items necessary to complete the work, application of coating system in accordance with the Drawings and Specifications and the coating system manufacturer’s instructions, proper curing and testing of coating systems as required and recommended by the manufacturer, and all other Work and items necessary (unless specifically measured and paid for elsewhere) required to provide the Coating System for Digester 2.

b. This item shall also include full compensation for all work required to remove and replace the existing sludge piping and related components; maintenance and protection of existing aeration piping OR removal / reinstallation of existing aeration piping; and preparation / sealing of all pipe / conduit wall penetrations in accordance with the coating system manufacturer’s instructions.

c. Unit of Measurement: Lump Sum.

6. Treatment Equipment – SBR 2 satisfactorily furnish and install treatment equipment and related items in SBR 2 as shown on the Drawings and specified herein including but not limited to review and verification of existing equipment and site conditions, coordination with equipment manufacturer, verification / coordination of dimensions and other information required for new equipment, preparation and submission / review / revisions / resubmission of submittals and shop drawings, coordination with DMVA staff as required, furnish and install incidental items including anchors / restraints / supports / fittings, new equipment connections to existing boxes / disconnects, furnish and install new valves, furnish and install pumps, replace ductile iron influent pipe (Class 52, cement lined) and related supports / painting / connection to existing piping, testing / startup / adjustment of new equipment including manufacturer’s on site representative, staff training, and all other Work and items (unless specifically measured and paid for elsewhere) required to provide the Treatment Equipment for SBR 2.

b. Unit of Measurement: Lump Sum.

7. Treatment Equipment – Digester 2 satisfactorily furnish and install treatment equipment and related items in Digester 2 as shown on the Drawings and specified herein including but not limited to review and verification of existing equipment and site conditions, coordination with equipment manufacturer, verification / coordination of dimensions and other information required for new equipment, submittals and shop drawings, review / revisions / resubmission of submittals and shop drawings, coordination with DMVA staff as required, furnish and install incidental items including anchors / restraints / supports / fittings, new equipment connections to existing boxes / disconnects, furnish and install new valves, furnish and install pumps, testing / startup / adjustment of new equipment including manufacturer’s on site representative, staff training, and all other Work and items (unless specifically measured and paid for elsewhere) required to provide the Treatment Equipment for Digester 2.

8. SBR and DIGESTER GRIT REMOVAL AND DISPOSAL

DMVA Project#: 42210054 012000 - 5

a. This price and payment shall constitute full compensation for all items necessary to satisfactorily clean, remove, and dispose of grit and other mostly inorganic materials from the SBR and Digester tanks as shown on the Drawings and specified herein including but not limited to collection and removal of materials from the tanks using mechanical and/or manual methods, dewatering of removed materials on site in an appropriate dewatering container, provision of pipe/fittings/connections to drain and direct water from dewatering tank to nearby manhole and back to the headworks at the WWTP, coordination with WWTP operating staff to drain water to the headworks in a controlled manner, and cleaning the tank, disposal of waste materials resulting from tank dewatering / cleaning operations, and all other Work and items necessary (unless specifically measured and paid for elsewhere) to prepare the site and Digester 2 tank for the tank coating work and new equipment installation.

b. DMVA will drain the SBR and Digester tanks to approximately 1.5 feet (18 inches) of the bottom of each tank. The Contractor shall be responsible for removing and pumping the remaining water and liquid sludge in the tanks back to the WWTP headworks in a controlled manner in coordination with WWTP operating staff. Payment for removing this water and any water that accumulates during construction shall be included in the Lump Sum Pay Items 2 and 3.

c. Unit of Measurement: Cubic Yard – Quantity shall be based on the “dewatered” volume of material in the dewatering container before it is hauled off-site based on measurements and assessment by the DMVA Project Manager and Contractor. DMVA Project Manager and Contractor shall agree to and document the quantity measured and to be included on Applications for Payment.

PART 2 PRODUCTS - Not Used

PART 3 EXECUTION - Not Used

END OF SECTION

TYPICAL PIPE PENETRATION

THROUGH WALL DETAIL

NOT TO SCALE

DETAIL - 1

DMVA Project#: 42210054 FTIG Wastewater Treatment Plant – SBR 2 and Digester 2 Rehabilitation

ADDENDUM NO. 3

NOTES:

1. PROVIDE LINING SYSTEM FOR PIPE PENETRATIONS AFTER WALL COATING SYSTEM IS

COMPLETED AND CURED.

2. PREPARE PIPE IN ACCORDANCE WITH NAPF 500-03.

3. PRIME PIPE WITH SPECIFIED POLYAMIDOAMINE EPOXY COATING, DFT 4.0 – 6.0 MILS;

8” MINIMUM FROM FACE OF WALL.

4. FILL GAP / VOID WITH TROWEL-GRADE MODIFIED POLYURETHANE (TNEMEC ELASTO-

SHIELD TG SERIES 265 OR EQUAL).

5. APPLY TACK COAT OF MODIFIED POLYURETHANE FLEXIBLE LINER (TNEMEC ELASTO-

SHIELD SERIES 264 OR EQUAL) 8’ ON THE PIPE AND 8’ ON THE WALL; EMBED

FIBERGLASS SCRIM (TNEMEC SERIES 261 OR EQUAL) AND SATURATE WITH

ADDITIONAL MODIFIED POLYURETHANE FLEXIBLE LINER TO ACHIEVE A MINIMUM DFT

OF 50 – 60 MILS.

6. PREPARE SURFACES AND PROVIDE COATING SYSTEM COMPONENTS IN ACCORDANCE

WITH COATING SYSTEM MANUFACTURER’S INSTRUCITONS.

TROWEL-GRADE

MODIFIED

POLYURETHANE MODIFIED

POLYURETHANE LINING

SYSTEM

TYPICAL ADHESIVE ANCHOR DETAIL

NOT TO SCALE

DIAMETER AS

REQUIRED

ANCHOR LENGTH

AS REQUIRED

EMBEDMENT

DEPTH AS

REQUIRED

EQUIPMENT / SUPPORT TO

BE ANCHORED

COATING SYSTEM

SEALANT (TYP.)

NOTES:

1. REMOVE ALL EXISTING ADHESIVE ANCHORS FOR EQUIPMENT TO BE REPLACED BY

CORE DRILLING OR OTHER APPROVED METHOD IN ACCORDANCE WITH ANCHOR

MANUFACTURER’S INSTRUCTIONS.

2. PROVIDE NEW ADHESIVE ANCHORS SIZE AS REQUIRED BY TREATMENT EQUIPMENT

MANUFACTURER IN ACCORDANCE WITH ANCHOR MANUFACTURER’S INSTRUCTIONS.

3. PROVIDE CHEMICAL RESISTANT POLYSULFIDE SEALANT AROUND ANCHOR WHERE IT

PENTRATES THE PROPOSED COATING SYSTEM IN ACCORANCE WITH THE COATING

SYSTEM MANUFACTURER’S INSTRUCTIONS.

DETAIL - 2

ADHESIVE ANCHOR

DMVA Project#: 42210054

EXISTING SLUDGE PIPING REMOVAL

/ REPLACEMENT PLAN

NOT TO SCALE

DETAIL - 3

NOTES:

1. REMOVE EXISTING 3” DUCTILE IRON SLUDGE PIPING, INSULATION, HEAT TRACE,

ANCHORS AND RELATED COMPONENTS TO FACILITATE TANK COATING SYSTEM WORK.

MAINTAIN AND PROTECT EXISTING FLANGED SLUDGE PIPING SPOOLS AND WALL

SEALS TO REMAIN WHERE PIPING PASSES THROUGH WALLS.

2. PROVIDE TEMPORARY WATERTIGHT CAPS ON EXISTING SLUDGE PIPING TO REMAIN IN

SERVICE.

3. PROVIDE NEW 3” DUCTILE IRON (CEMENT LINED, CLASS 53) SLUDGE PIPING, GASKETS

AND STAINLESS STEEL HARDWARE. PROVIDE NEW PIPE SUPPORTS MATCHING

EXISTING. PROVIDE NEW HEAT TRACE AND CONNECT TO EXISTING JUNCTION BOXES.

PROVIDE NEW PIPE INSULATION AND INSULATION ENCASEMENT MATCHING

EXISTING.

SBR #2

DIGESTER #2

EXISTING SLUDGE

PIPING TO BE

REMOVED AND

REINSTALLED

DMVA Project#: 42210054

EXISTING AERATION PIPING PLAN

NOT TO SCALE

DETAIL - 4

NOTES:

1. MAINTAIN AND PROTECT EXISTING AERATION PIPING AND RELATED COMPONENTS TO

FACILITATE COATING SYSTEM WORK.

2. AERATION PIPING AND RELATED COMPONENTS MAY BE REMOVED AND REINSTALLED

TO FACILITATE WORK AT NO ADDITIONAL COST.

3. IF PIPING IS REMOVED, PROVIDE TEMPORARY AIRTIGHT CAPS ON EXISTING PIPING TO

REMAIN IN SERVICE. REINSTALL REMOVED PIPING AND COMPONENTS WITH NEW

SUPPORTS AND HARDWARE MATCHING EXISTING MATERIALS.

EXISTING

AERATION PIPING

DMVA Project#: 42210054