Addendum_20230905_0008.pdf
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- Attached to
- MORU 272051 WWTP Solicitation
- Solicitation number
- 140P2023R0125
About this file
This document is an addendum to the solicitation for the MORU 272051 WWTP project. Key details include:
The addendum provides 38 revisions to the technical specifications for the wastewater treatment plant project. Revisions include changing compressor specifications from reciprocating to rotary screw, increasing the design pressure for compressed air systems, adding acceptable manufacturers for various pumping and treatment equipment, revising warranty periods, and modifying testing procedures. The solicitation number is 140P2023R0125 and is issued by the National Park Service for a wastewater treatment plant located at an unspecified National Park site. Responses are due by the date specified in the amended solicitation documents.
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Text version
MORU 257051 National Park Service 9/5/23
AMENDMENT #8
CHANGES TO SPECIFICATIONS
8.1 Section 40 12 00 – Compressed Air System (Bid Option 3): Paragraph 1.1.A.1.a, Delete
“Reciprocating” and Replace with “Rotary Screw”.
8.2 Section 40 12 00 – Compressed Air System (Bid Option 3): Delete Paragraph 2.2.A.1.c and Replace with “Modular desiccant dryer”.
8.3 Section 40 12 00 – Compressed Air System (Bid Option 3): Paragraph 2.2.B.1.d, Delete “65 db” and Replace with “69 db”.
8.4 Section 40 12 00 – Compressed Air System (Bid Option 3): Paragraph 2.3.C, Delete “150 psi” and
Replace with “200 psi”.
8.5 Section 40 61 13 – Process Control System General Requirements: Delete Paragraph 1.2.B.1.b.
8.6 Section 43 11 33 – Rotary Lobe Blowers: Paragraph 2.4.C.3, Delete “and blower system as a whole”.
8.7 Section 43 23 31 – Pumping Equipment - Liquid Chemical Feed Skids - Peristaltic: Paragraph
2.1.A.1, Delete “500 Series and 600 Series” and Replace with “QDOS Series”.
8.8 Section 43 25 13 – Pumping Equipment – Submersible End-Suction Sewage Pumps: Add Paragraph
2.1.A.4. “Pentair – Hydromatic”.
8.9 Section 46 13 01 – Fiberglass Covers – Dome Type: Paragraph 2.2.A.1, Delete “Contact molded or hand-laid up fiberglass materials shall not be acceptable as structural components.”
8.10 Section 46 13 01 – Fiberglass Covers – Dome Type: Paragraph 2.2.A.1, At the end of the paragraph
Add “or open molding.”
8.11 Section 46 13 01 – Fiberglass Covers – Dome Type: Paragraph 2.2.A.2.b, Delete “50%” and
Replace with “30%”.
8.12 Section 46 13 01 – Fiberglass Covers – Dome Type: Delete Paragraphs 2.2.A.3.a through 2.2.A.3.f.
and Replace with the following minimum values:
a. Tensile Strength (ASTM D 638) 15,000 psi min.
b. Compressive Strength (ASTM D 695) 15,000 psi min.
c. Flexural Strength (ASTM D 790) 15,000 psi min.
d. Modulus of Elasticity (ASTM D 790) 1x106 psi min.
e. Glass Content 30% min.
f. Coefficient of Linear Expansion 15x10-6 in/in/F
8.13 Section 46 13 01 – Fiberglass Covers – Dome Type: Delete Paragraphs 2.2.A.4 and 2.2.A.5.
8.14 Section 46 13 01 – Fiberglass Covers – Dome Type: Delete Paragraphs 2.2.A.7 through 2.2.A.12.
8.15 Section 46 13 01 – Fiberglass Covers – Dome Type: Delete Paragraphs 2.2.A.14 through 2.2.A.17.
8.16 Section 46 13 01 – Fiberglass Covers – Dome Type: Add Paragraphs 2.2.A.18.c. “East Aeration
Basin: 4” low pressure air pipe penetration.” and Paragraph 2.2.A.18.d. “East Clarifier: 4" roof penetration for sludge sampling pole.”
8.17 Section 46 13 01 – Fiberglass Covers – Dome Type: Delete Paragraphs 2.2.A.20.b. and 2.2.A.20.c.
8.18 Section 46 13 01 – Fiberglass Covers – Dome Type: Add Paragraphs 2.2.A.21:
“Doors: 3’-0” wide and 6’-8” high, FRP construction.
a. Aeration Basin: Quantity 2 (1 at each end section).
b. Clarifier: Quantity 1
8.19 Section 46 13 01 – Fiberglass Covers – Dome Type: Add Paragraphs 2.2.A.22, “Louvers: Aeration
Basin: 12” x 14” aluminum louver, Quantity 1.
8.20 Section 46 13 01 – Fiberglass Covers – Dome Type: Add Paragraphs 2.3.A.1.a.1)a, “Cover to be walking height at the perimeter. Minimum height at sidewalls is 6’-0”.”
8.21 Section 46 13 01 – Fiberglass Covers – Dome Type: Add Paragraphs 2.3.A.1.a.2)a, “Cover to be walking height from access door to center of dome. Minimum height at access door continuous to dome center is 7’-0”.”
8.22 Section 46 13 01 – Fiberglass Covers – Dome Type: Delete Paragraph 3.3.A. and Replace with
“Covers shall be weatherproof. Any areas of water penetration shall be repaired by the installing contractor.”
8.23 Section 46 33 33 – Liquid Polymer Feed Equipment: Paragraph 1.3.A, Delete “4 (four)” and Replace with “2 (two)”.
8.24 Section 46 33 33 – Liquid Polymer Feed Equipment: Paragraph 2.3.F.1, Delete “average input power less than 6 amps” and Replace with “maximum FLA draw not to exceed 15 amps”.
8.25 Section 46 33 33 – Liquid Polymer Feed Equipment: Delete Paragraph 2.4.A.1. A standalone transfer pump is not required and may be integral to the polymer pump.
8.26 Section 46 43 24 – Spiral Scraper Circular Secondary Clarifier Equipment: Add Paragraph
2.4.H.1.a. “Cycloidal drives are an acceptable drive mechanism alternative.”
8.27 Section 46 43 24 – Spiral Scraper Circular Secondary Clarifier Equipment: Add Paragraph
2.4.H.2.b. “Fabricated steel is an acceptable alternative.”
8.28 Section 46 43 24 – Spiral Scraper Circular Secondary Clarifier Equipment: At the end of Paragraph
2.4.H.3. “or grease.”
8.29 Section 46 43 24 – Spiral Scraper Circular Secondary Clarifier Equipment: Add Paragraph
2.4.H.9.c.2) “Precision bearings are an acceptable alternative.”
8.30 Section 46 51 32 – Flexible Membrane Diffusers: Add Paragraph 2.1.A.3. “SSI Aeration Inc.”.
8.31 Section 46 66 56 – Ultraviolet (UV) Disinfection System Equipment: Paragraph 1.1.A.1, Delete, “high intensity” and “complete with an automatic mechanical cleaning system and variable output lamp drivers”.
8.32 Section 46 66 56 – Ultraviolet (UV) Disinfection System Equipment: Paragraph 1.4.B, Delete, “or thirty-six (36) calendar months from shipment, whichever comes first.”
8.33 Section 46 66 56 – Ultraviolet (UV) Disinfection System Equipment: Delete Paragraphs 1.4.C and
1.4.D. The general warranty applies to drivers and sensors.
8.34 Section 46 66 56 – Ultraviolet (UV) Disinfection System Equipment: Add Paragraphs 2.1.A.3.a, “Acceptable alternate manufacturer (may require power supply revisions): Xylem - Wedeco”
8.35 Section 46 66 56 – Ultraviolet (UV) Disinfection System Equipment: Paragraphs 2.3.C.3. Delete
“.or thirty-six (36) calendar months from shipment, whichever comes first”.
8.36 Section 46 66 56 – Ultraviolet (UV) Disinfection System Equipment: Delete Paragraphs 2.3.N.6., 2.3.N.7. and 2.3.N.8.
8.37 Section 46 66 56 – Ultraviolet (UV) Disinfection System Equipment: Delete Paragraphs 2.4. The equipment does not require a control panel.
8.38 Section 46 66 56 – Ultraviolet (UV) Disinfection System Equipment: Paragraphs 3.2.E. Delete
“three (3) 8-HR days and a maximum of five (5) 8-HR days and two trips” and replace with “one
(1) 8-HR day”.
8.39 Section 46 66 56 – Ultraviolet (UV) Disinfection System Equipment: Delete Paragraphs 3.4.B.5.b., 3.4.B.5.d., 3.4.B.5.e., and 3.4.B.5.h.
8.40 Section 46 66 56 – Ultraviolet (UV) Disinfection System Equipment: Delete Paragraph 3.4.C. and
Replace with “Performance Testing: Three acceptable E. coli samples. Sample analysis will be conducted at Owner’s laboratory or an independent laboratory at Owner’s discretion at Owner’s expense.”
8.41 Section 46 66 56 – Ultraviolet (UV) Disinfection System Equipment: Paragraph 3.6.A. Delete “two
(2) full days” and replace with “one (1) full day”.
8.42 Section 46 66 56 – Ultraviolet (UV) Disinfection System Equipment: Delete Paragraphs 3.6.E.7., 3.6.E.9, and 3.6.E.10.
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