21R1339 Note 7.pdf
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- Solicitation number
- N6274221R1339
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This document contains questions and answers regarding solicitation number N6274221R1339 for the FY18 MCON P-103 Water Well Field project at US NAVSUPACT ANDERSEN, GUAM. The project involves construction of a water well system including raw water transmission lines, water treatment, water storage, water transfer pump facility, power and communications systems, and treated water transmission lines. Two well sites will include generator buildings while other sites will have electrical buildings. The water system will supply water primarily to the Marine Corps Base Guam. Questions addressed piping materials and fittings, exterior coatings for ductile iron pipe, testing methods for sand content, drilling test wells, and whether mechanical pipe restraints can replace concrete thrust blocks.
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Other files
| File | Type | Posted |
|---|---|---|
| 21R1339_AMD5.pdf | ||
| 21R1339 Note 11.pdf | ||
| 21R1339 Note 10.pdf | ||
| 21R1339_AMD4.pdf | ||
| 21R1339 Note 9.pdf | ||
| 21R1339_AMD3.pdf | ||
| 21R1339 Note 8.pdf | ||
| 21R1339_AMD2.pdf | ||
| 21R1339_AMD2_Drawings.pdf | ||
| 21R1339 Note 6.pdf | ||
| 21R1339 Note 5.pdf | ||
| 21R1339_AMD1.pdf | ||
| 21R1339_AMD1_Drawings.pdf | ||
| P103 SV Sign-in.pdf | ||
| 21R1339 Note 4.pdf | ||
| 21R1339 Note 3.pdf | ||
| 21R1339 Note 2.pdf | ||
| 21R1339 Note 1.pdf | ||
| 21R1339-RFP.pdf | ||
| P-103 Water Well Field_Specifications.pdf | ||
| P-103 Water Well Field_DWGS.pdf | ||
| 21R1339-JA_Redacted.zip | ZIP file |
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Text version
Notice No. 7
7 September 2021
PRE-PROPOSAL QUESTIONS & ANSWERS
RFP N62742-21-R-1339
FY18 MCON P-103 WATER WELL FIELD US NAVSUPACT ANDERSEN, GUAM
NOTE: The following questions and answers are provided for INFORMATION ONLY. The RFP remains unchanged unless it is amended in writing on a Standard Form 30.
REVISED RESPONSES FROM NOTICE NO. 5 DATED 31 AUGUST 2021
20. Ref. Section 1.2.4.1, p. Description of specific methods employed to test for sand. Is sand content percentage testing during constant rate/final pump test being asked for? Will parameter measurements such as turbidity suffice?
REVISED ANSWER: Section 33 11 13 subpart 3.3.4 will be added to state that the test for sand content must be performed with a centrifugal sand sampler. The centrifugal sand sampler is referenced in AWWA A100 Appendix E. See forthcoming amendment.
21. Ref. Section 1.2.4.2. 100mm test well, upper aquiclude, case, grout and seal the boring, use test well to determine flow & water quality etc. The test well may be converted to the permanent well. There is no upper aquiclude at this site. Cannot case, grout and seal a test well that may be converted to a larger diameter permanent well. Drilling a 12” open (pilot) test hole for capacity testing has previously been done successfully.
REVISED ANSWER: Section 33 11 13 subpart 1.2.4.2 will be revised. The 100 mm diameter test well will be revised to a 300 mm test boring. A pump test in the open borehole will be performed to evaluate its potential as a production well. If appropriate based on the pump test, the borehole will be completed as a production well. If not, the borehole will be sealed and abandoned. See forthcoming amendment.
NOTICE NO. 7
70. Ref. 33 11 00 Part 3.2.1.2.c. Part 3.2.1.2.c Exterior Protection does not provide the exterior coating requirements for buried or above grade ductile iron pipe. Please confirm that the exterior coating may be standard factory applied asphaltic coating in accordance with AWWA C151 is acceptable for both buried and exposed above ground DI Pipe.
DEPARTMENT OF THE NAVY
NAVAL FACILITIES ENGINEERING SYSTEMS COMMAND, PACIFIC
258 MAKALAPA DRIVE, SUITE 100
JOINT BASE PEARL HARBOR HICKAM, HAWAII 96860-3134
ANSWER: Specification Section 33 11 00 Paragraph 3.2.1.2.c requires buried ductile iron pipe to be encased in polyethylene film in accordance with AWWA C105. Section 33 11 00 Paragraph 2.1.1.1.1 requires conformance with AWWA C151. AWWA C151 Section 4.4.1 requires “The outside coating used under normal conditions shall be a shop-applied coating approximately 1-mil (25-mm) thick”. The pipe manufacturer’s standard exterior coating including asphaltic coating is acceptable.
71. Ref. 33 11 00 Part 2.2.1 Part 2.2.1, Please confirm if mechanical pipe restraints will be allowed in lieu of concrete thrust blocks.
ANSWER: Mechanical pipe restraints are not allowed in lieu of concrete thrust blocks. Provide concrete thrust blocks in accordance with Specification Section 33 11 00 Paragraph 2.2.1.
72. Ref. Drawings CI405 and CI407 Please provide the 25mm jockey pump water line material and fittings required.
ANSWER: Provide ASTM D1785 Schedule 40 pipe with ASTM D2466 Schedule 40 solvent weld fittings in accordance with Specification Section 33 11 00 Paragraph 2.1.1.2.2.1.
End of Notice
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