B09_PRWI_317499_Amd_02_-_QA_Document_0002.pdf

Question Set Set Number Date Specification Question Response

1 7/25/2022 65/132 C‐6 Plans call for a Geotechnical Company to perform borings prior to placement of septic & pumping tanks and pumping station, Is this the

Contractors responsibility to hire and complete the borings and geotechnical investigation?

Yes. Contractor is responsible for geotechnical testing.

2 7/25/2022 62,63,64 / 132 C‐3 to C‐5 Are as‐builts or photos available for the tanks and structures that are called out to be removed and/or abandoned?

As‐builts are not available. Photos of Cabin Camp 3 will be provided with the forthcoming Addendum No. 2. Note:

Structures are typical precast concrete customary to conventional sewage treatment systems

3 7/25/2022 Instructions for Submission of

Offers

Section D.7. Page size shall be 8.5x11 inches, with no less than one (1) inch margins. Pages shall be single‐spaced, using no less than 12‐ point font. Please advise that the "Project Experience" form is does not have 1‐inch margins or12‐point font. Please confirm that we do not need to reformat this page for submission.

Reformating the Government Provided "Project Experience" form is not required for submission.

4 7/25/2022 Instructions for Submission of

Offers VOLUME 1, Technical Proposal Factors. Please confirm the name and order of technical proposal factors.

VOLUME 1 Factors are as follows: Factor 1 ‐ Project Experience | Factor 2 ‐ Schedule | Factor 3 ‐ Technical

Approach | Factor 4 ‐ Key Personnel Experience | Factor 5 ‐ Past Performance

5 7/25/2022 Instructions for Submission of

Offers Is the proposal due at 1:00 PM Eastern time or 1:00 Mountain (local) time?

Proposal due time of 1300 (1:00pm) is in Eastern Time NOT Mountain Time. The SAM.gov posting shows the correct time of 1300 (1:00pm) Eastern Time.

6 7/25/2022 Instructions for Submission of

Offers

May previously completed PPQ forms be submitted with the proposal if they contain the same information as the forms utilized for this proposal submission?

Previously Completed PPQ Forms may be submitted as long as they contain the same information and the PPQ form is for a corresponding project as directed in the Solicitation for PPQ submissions.

7 7/25/2022 Instructions for Submission of

Offers

The contractor needs time to review RFI responses and adjust our proposal accordingly, may the bid date be extended an additional 2 weeks?

Amendment 0001 was issued on July 25, 2022 for a 1‐week extension. A two week extension is not possible.

8 7/25/2022 92/132 Upper right note says to remove stumps to 12” below ground, does this include the primary area of the absorption trenches? Yes.

9 7/25/2022 99/132 Reference to the typical trench detail on drawing C‐24, is the typical trench detail actually located on drawing C‐25? Yes. Remove and Replace reference on 99 of 132 with "Typical absorption trench. See sheet C‐25 detail"

10 7/25/2022 99/132 Are we to assume all circles with northings and eastings are a "MOSTER D‐BOX" as shown on C‐25?

There are 3 monster D Boxes on sheet 99/132 and one Master D‐box. The master D‐Box is located at 3+63 at the discharge of the pumpstation. 3 lines leave and each lead to a Monster D‐Box.

11 7/25/2022 99/132 What are the bedding/backfill requirements for the 4" PVC header pipe? Please provide a detail/section. Header pipe is backfilled with native earth excavated for installation

12 7/25/2022 99/132

Note states that all absorption trenches are ‘ typical 100 feet’ This is not correct. Actually, there are none that are 100 feet long. Using the provided coordinates the longest one is 96.8 feet long and that is from the center of the monster box. The majority of the trenches are either not perpendicular or at some odd angle to the main run. To maintain the 9 feet separation the fittings used will all need to be the same, making most of the trenches shorter. Please provide a new drawing or verify that less than 100' is the typical.

Absorption trenches are aligned with existing contour. Trenches are installed with min.9'c‐c spacing. All absorption trenches are 100 LF, constructed in accordance with VDH regulations

13 7/25/2022 103/132 Plans omit a profile of the proposed Lift Station and the invert elevation. Please provide the invert elevation. Invert = 229.42. See sheets 103 and 100 of 132

14 7/25/2022 112/132 Plans omit a profile of the proposed Lift Station and the invert elevation. Please provide the invert elevation. Invert = 229.42. See sheets 103 and 100 of 132

15 7/25/2022 111/132 The detail for the drop manhole is shown with a cone top. The 2 drop manholes on this project have flat tops, please provide detail of drop manhole with flat top.

For drop manholes, install a flat top manhole per Prince William County Service Authority detail S‐19. Standards are located in Appendix B on this site: https://www.pwcsa.org/utility‐standards‐manual‐effective‐April‐1‐2021.

Cast in frame and cover shall be US Foundry USF763 by Capital Foundry or approved equal.

16 7/25/2022 111/132 Plans require 1 joint of ductile iron pipe entering the drop manholes. What class DIP? Minimum Class 52.

17 7/25/2022 112/132 Plans show what looks like rock around the mounting pedestal, it is unlabeled with no stated limits. Please clarify. #57 Stone with Underlying Filter Fabric. Provide minimum bedding of 6‐inches with 12‐inches extension.

18 7/25/2022 112/132 Plans show a rail system for the pumps but this system is not shown on the profile given. Are we to provide a rail system for the pumps, if so, please indicate on the profile of the pump station.

As per drawings, provide Z‐Rail system 39‐0129 or approved equal. Guide rail top bracket shall be located on same side as discharge piping shown.

19 7/25/2022 62/132 & 92/132 Plans utilize different symbols indicating the removal of pipe between these two drawings. Please revise and provide consistent labeling for clarity.

Plan sheet 62 will be revised as Addendum.

20 7/25/2022 62/132 The symbol for abandoning and removing pipe are the same, please revise removal sheet for clarity. Plan sheet 62 will be revised as Addendum.

21 7/25/2022 62/132 Plans show the symbol for capping the existing pipe yet there is a note to remove that pipeline. Please clarify. Plan sheet 62 will be revised as Addendum.

22 7/25/2022 62/132

Plans show the 6” clay gravity sewer up to the 3rd manhole from the pump station is labeled to be abandon. Beyond that manhole there is no indication as to whether it is to be abandon or removed. Please provide clarification as to what get removed and what get abandoned.

Plan sheet 62 will be revised as Addendum

23 7/25/2022 63/132 Are we to assume that all of the gravity sewer pipe is to be abandoned? Gravity pipe is unlabeled with hash marks. Plan sheet 63 will be revised as Addendum

24 7/25/2022 63/132

Plans show 4 drain fields which we assume are existing. You want us to cap all the pipe going into & out of the distribution boxes. Does this mean when we install the new drain field we will intersect & cross the existing drain field pipe? This does not sound like a good construction procedure.

Plan sheet 63 will be revised as Addendum

25 7/25/2022 63/132 Plans have no indication whether the gravity sewer line from a manhole that is to be removed to building #70 is to be abandon, removed, or left alone. Please clarify.

Plan sheet 63 will be revised as Addendum

26 7/25/2022 63/132 Plans show removing a grease trap with no pipe going into or out of the structure. Assuming there is pipe, what size is it and does it get abandoned or removed?

The existing pipe is 4‐inch PVC and shall be removed as necessary for installation of the new sewerage system.

27 7/25/2022 63/132 & 64/132 At the match line the 2" PVC force main stops short on 63 and on drawing 64 there is no pipe shown. Please clarify. We assume there is a force main/gravity line leaving the lift station (not shown). Is this pipe to be abandoned or removed?

2‐inch PVC force main leaves the existing pump station. This pipe shall be removed as necessary for installation of new station and force main. Any piping not requiring removal for this installation shall be plugged/capped. Pipe removal and abandonment is incidental to the work.

28 7/25/2022 63/132 On the right side of the drawing there is to be a SSMH removed with pipe leaving the edge of the drawing but no continuation shown. Is this the limit of work? There are 2" PVC and 6" Clay pipes shown connecting to the MH but no indication of what to do with them.

Plan sheet 63 will be revised as Addendum

29 7/25/2022 64/132 Please verify there is no pipe connecting building 85A to any sewer system. No

30 7/25/2022 65/132 What size is the pipe from building #101? 6‐inch PVC. See drawing no. 70 of 132.

31 7/25/2022 66/132 What size is the pipe between building #60 and the new septic tank? 6‐inch PVC. See drawing no. 70 of 132.

32 7/25/2022 66/132 We see no sewer line connection from building #95 to the new sewer system. Please clarify. Building sewer is present. Plan will be revised in Addendum

33 7/25/2022 65/132 & 68/132 On drawing 65 it calls out for a tank/pump station but on drawing 68, it is called out as a Dosing Station. Which is correct?

Dosing station and pump tank are the same for this project. We are dosing the drain field with a pump tank.

Please remove dosing station and replace with Pump Tank for consistency.

34 7/25/2022 71/132 Is Manhole #14 a drop manhole? It is not indicated as such. Please clarify.

Yes. Manhole #14 is a drop manhole. Manhole #5 is also a drop manhole. Will be noted in forthcoming

Addendum

35 7/25/2022 68/132 & 73/132 The profile of the Dosing Station/Tank/Pump Station show a bottom of structure below elevation 120 on drawing 68 and above elevation 120 on drawing 73. Please verify the bottom elevation of this structure.

Inside bottom elevation = 119.7. Outside bottom elevation + 119.20. See drawing no. 80 of 132.

36 7/25/2022 67/132 & 79/132 Drawing 79 shows a 2” drain for the fiberglass grinder pump but there is no evidence of its location or length on drawing 67. Please provide The 2‐inch ARV vault drain connects to the fiberglass wet well. Length is approximately 4 linear feet.

37 7/25/2022 79/132 The air relief vault is NTS and there is no dimension on the base rock underneath the concrete structure. Please provide. 12‐inch extension and 10‐inch depth.

38 7/25/2022 81/132 Plans fail to provide the finish grade on the 1000 Septic Tank, please provide. Finished Grade Elev.= 171.50

39 7/25/2022 60/132 & 82/132 On drawing 82 the sanitary sewer cleanout details refer to DWV for an adapter but on drawing 60 under abbreviations there is no DWV.

What does DWV stand for?

Drain Waste, and Vent. The Adapter transitions SDR 35 to Sch 40 PVC.

40 7/25/2022 84/132 Air Release structure, plans fail to dimension the limits of the #57 rock on a NTS detail. Please provide. Provide 12‐inch extension.

41 7/25/2022 10/132 Call out #10 states to remove concrete sidewalk but the area referred to is indicating it is asphalt pavement (near entrance). Please clarify.

Based on a review of the existing conditions, the existing sanitary sewer to be removed lies with the existing concrete pad.

42 7/25/2022 10/132 Note 3: This note says to removal all sanitary sewer lines except as noted, we see one sewer reach is to be abandoned. Remove all others? Does this include the sewer line that runs under the porch?

We recommend the contractor to abandon the sewer line noted under the porch and remove all other areas.

43 7/25/2022 10/132 In the corner of the gravel parking lot near the Manager’s Resident there are several x’s for removal but none of the existing facilities are labeled. Please provide details of what is to be removed in this area.

The utilities in question can be found on the existing conditions plan (Sheet C‐101, 7 of 132).

44 7/25/2022 7/132 In the far upper right corner of the drawing you indicate two cleanouts but there is no pipe shown attached to these cleanouts. Please clarify.

There are numerous sanitary sewer cleanouts shown on the existing conditions plan that were surveyed. These cleanouts are providing sewer service via laterals for the various trailer sites. We don't have design plans for the laterals so the actual laterals are not identified on the plans.

45 7/25/2022 10/132 & 24/132 On drawing 10 the existing sanitary sewer from MH #3 to MH #10 shows to remain in place. On drawing 24 the same line shows a new

8” sewer. Which is correct?

The contractor is instructed to remove the existing sanitary sewer between Manholes #3 and #10.

46 7/25/2022 10/132 & 24/132 On drawing 10, Keynote #8 says to remove the MH leading into the Pump station but on drawing 24 it shows no new MH. Please clarify.

The manhole is to be replaced with new structure #F1 as shown on the profiles and structure table.

47 7/25/2022 24/132 The new sewer line between the MH leading into the Pump Station and MH 14 does not have a size called out. Please provide. The size of the line is 8" as shown on the profile.

48 7/25/2022 24/132 The 2 yard hydrants that are located in the Manager’s parking lot (1” per drawing) is coming off a ¾” mainline. Is this correct? It will drastically reduce the pressure.

The contractor is instructed to install 1 ‐1/2" PVC through the second hydrant connection after which the size of the PVC shall remain 3/4" diameter as shown on the plans.

49 7/25/2022 54/132 Detail 4: There are several sewer cleanouts that are not next to the mainline sewer (up to 8 feet). Please provide a detail that will take these distances into consideration.

The detail will be revised in accordance with Comment #52 to reflect varying sizes of the main sewer line. All laterals shall be 4" diamter and the contractor will be responsible for installing the lateral with a minimum slope of

2% from the cleanout to the main connection.

A

Amendment 0002

Posted: 07/28/2022

50 7/25/2022 24/132 The connection between the 1” pipe for the yard hydrant and the 4” main line should be a 4” x 1” tee or a 4” x 1” saddle? Yard hydrant connections for the individual trailer sites shall be with a corporation valve and saddle connection.

51 7/25/2022 8/132 What size is the existing sewer between MH #10 & MH #11? Existing sewer line is 8" diameter.

52 7/25/2022 52/132 Detail 4: There are 7 different connections to 8” main line pipe, not only 4 “ & 6”, please provide details for each.

Detail #4 will be revised to properly reflect a standard 4" lateral connection to either a 8" , 6" , or 4" sewer main.

All laterals will be installed with the cleanout configuration shown in the detail and lateral connection to main as shown in the detail. All laterals will maintain at least 2% slope from the cleanout to the connection at the main.

53 7/25/2022 3/132

Temporary facilities are unclear as to location, power supply, and ownership. Is there a desired location for a trailer? What are the requirements, if any, for client trailers? Is there a power source on site for temporary facilities. If so, is the contractor responsible to carry the cost for the power? If not, is the contractor to assume generator power for temporary facilities?

During the work at the RV Campground, the contractor shall setup a field office at the RV campground. Full utilities are available at various sites but these utilities may be temporarily interrupted due to the proposed work at the RV Camp. The contractor shall coordinate with the NPS before connecting to any utilities in the RV

Campground. Any relocation of the field office from the original approved location and utilities will also require

NPS approval.

Once the RV camp work is complete, the NPS and contractor will coordinate a location on the south side of the park for a field office. There are several possible locations with varying degrees of utility service, but at a minimum, each location will have access to power.

The Contractor will be responsible for all costs associated with any temporary utilities including power, water, sewer, and communications. Contractor will be responsible for coordinating all temporary utilities connections with NPS and/or utility provider.

54 7/25/2022 Instructions for Submission of

Offers

Please provide clarity on the state taxes that need to be carried by the contractor. Are state sales taxes exempt? If not, when must they be paid?

This solicitation and resulting award will follow the requirements outlined in FAR Clause 52.229‐3 ‐ FEDERAL, STATE,AND LOCAL TAXES (FEB 2013).

55 7/25/2022 3/132 The RV site is a substantial distance from the laydown shown on the plans. What is the location for laydown for the RV site?

The contractor is advised that the whole RV Campground site will be available for use as a laydown and staging area for its activities associated with the RV Campground project only.

56 7/25/2022 3/132 Is there a power source in the staging area that the contractor may utilize. No available power source in staging area.

57 7/25/2022 52/132

Do all of the storm, sanitary, and water utilities have to follow the utility trench detail shown on sheet 52 of 132. This detail requires the aggregate to be backfilled up to finished grade. There is a note on the detail that says “Stone at the surface to be replaced with turf for non‐asphalt areas.” What is the requirement for the “turf” that will replace the stone?

Trenches shall be backfilled with stone in all paved areas as shown in the detail. For turf areas, the top 6 inches of stone shall be replaced with topsoil and seeded.

58 7/25/2022 Manhole sizes seem to have been omitted, can you provide diameters for all the sanitary structures? All Sanitary manholes are a 48" diameter except for the all drop manholes shall be 60" inside diamater.