GRCA_North_Rim_Q_and_A_Amend_0005_07.13.18.pdf

Question and Answer

Spreadsheet

140P2018R0076 /

GRCA 160057

Question No. Sheet or Reference Question Response Amendment Answered

1 C401

What is the testing (if any) requirements for the RW piping to be lined in Bid Option #2?

a. Hydrostatic Pressure test in accordance with ASTM F1216.

b. Disinfection and testing per specification 33 11 00 Section 3.13.

2 C239, C305

The new plan set page 115 missing a detail that is called out on the drawings.

On the previous drawings for this page there was a block in the bottom left corner of the drawing E C239 C305

See attached sheets for reference:

GRCA 160057 - C239.pdf GRCA 160057 - C305.pdf

3 C401

Based upon Specification for CIPP, we must have information for design parameter and calculations and eventual pricing - _______ normal operating pressure of 8” RW piping, ______surge pressure of 8” RW piping, _____ vacuum pressure of RW piping (if any), _____ max. depth of RW piping, ______number and size of service on RW piping, ______number of bends and type (22.5, 45, 90, tee, etc.).

For proposal assume section (200+00 to 207+93) to utilize pipe bursting due to possible size reduction. The rest to be CIPP with the following parameters:

1. RW Information

a. Maximum operating Pressure of 8” RW piping -

100 PSI

b. Surge Pressure of 8” RW Piping

- Estimated at 275 PSI

c. Vacuum Pressure – will be answered in a future amendment

d. Max Depth of RW Piping -Depth of RW piping is unknown. Assume it is 3.5’ depth

e. Number and size of service on RW Piping

i. 10 Fire Hydrants with an assumed 6” service.

ii. 1 Drain lateral – assumed 4”

iii. 2 Backflow Preventer – 8” (Size from Phase 1 As-Builts)

iv. 2 ARV – Assumed 2”

v. XX amount of valves - will be answered in a future amendment

f. Number of Bends and Types – Check Drawings for surveyed alignment