Questions_and_Answers.pdf

1: On sheet ES-116, a line is shown coming out of the 2-5” duct bank as if to be the primary feed for TX-SL2. However, no separate primary conduit is identified in the duct bank, just the 2-5” ducts. Please clarify.

A: 2-5” from MH300A to MH373. 2-4” from MH373 to TX-SL2.

2. Plans say all primary duct banks are 2-5”. Sheet ES-505 says ducts going to pad mounted transformers can be 2-4”. Using 2-4” for transformer primary feeds is mentioned elsewhere in the bid documents. Please clarify.

A: 2-4” conduits to transformers is allowed; 2-5” conduits everywhere else.

3. 8’x8’ octagon manholes, as shown on the plans, are not a standard available item in pre- cast concrete. Are 8x8 square precast manholes acceptable? Be advised that if octagon manholes are required, they will take 3-4 months to manufacture and will impact the schedule by delaying project start.

A: Yes, 8x8 square is acceptable.

4. Regarding the “MOUNTING” column in the light fixture schedule on sheet E-506, please provide catalog data on the existing 30’ street light poles we are to match.

A: The round, tapered aluminum poles are by P&K Tubular Products.

5. Regarding Keyed Note 1 on sheet E-506, please state the quantity of LED fixtures the contractor will have to provide. Refer to “ADDITIONAL QUANTIES AS NEEDED”. Please provide the exact quantity required as a basis for bid.

A: Fixtures are indicated on design documents. The statement in question means to provide new fixtures in addition to the reused fixtures. SAFB can provide the quantity of existing fixtures to be reused.

6. Several of the Civil sheets with profiles show new duct banks crossing roads with neither boring or cutting and patching indicated. Are we to assume all road crossings will be by horizontal boring as implied by Key Note 1 on the ES sheets?

A: Yes.

7. All civil drawings show bores with call out “PVC Casing”. The industry standard is steel casings. Are steel casings acceptable?

A: Yes, if more economical.

8. Considering the depth of the new duct banks shown on the civil drawings we believe the 12” separation between the Primary and Communications duct bank to be excessive. Typical separation between Power and Communication ducts is six inches. Is six-inch separation between primary and communication ducts acceptable?

A: No.

9. Detail 1 on sheet E-503 indicates rebar “WHERE REQUIRED (SEE SPECS). We cannot find where rebar in the duct banks is mentioned in the specs. Please clarify where rebar is required in the duct banks. At most military bases, rebar is required only in duct banks under pavement.

A: Correct – rebar is only required in duct banks under pavement.

10. Regarding Detail 3, Sheet E-504: Can precast manholes be provided with duct terminators cast in a recessed window? Duct entries are much more water tight when provided in this manner.

11. Sheet ES-111 at switch VS703 there is a line shown as “EXISTING CIRCUIT #3 CROSS- TIE”. It appears we are to intercept the existing underground circuit #3 and re-terminate at switch VS703. Please clarify.

A: Yes, re-terminate to switch.

12. Do we replace the cable?

13. How far away is the next termination point?

A: Riser pole at 5th & Ave J

14. The manhole designations on sheet ES-114, south of Manhole 430B, are not the same as shown on sheet E604. Please clarify.

A: Sheet ES-114:

Change label for elec MH from ‘MH370A’ to ‘MH371A’.

Sheet E-604:

Change label for elec MH from ‘MH370C’ to ‘MH340A’

Change label for elec MH from ‘MH370B’ to ‘MH 371A’

15. Regarding Sheet E-501, Detail 1, upper note 4, what is meant by “MINIMUM OF 5 CU

ANCHOR RODS”?

A: Referring to the 5 ground rods of the grounding ring.

16. We cannot find the concrete strength requirements on the plans or specs. Please provide concrete strength requirements for the project.

A: The concrete strengths are broken down as follows:

• Specification 33 71 02, Section 2.11, electrical ductbank encasement = 3,000 psi

• Specification 33 71 02, Section 2.11, concrete encasement for all other electrical components = 4,000 psi

• Specification 33 71 02, Section 2.12, electrical cast-in-place structures = 3,500 psi (as this specification references Spec 03 31 01.00 10 which calls for 3,500 psi)

• Specification 32 13 13.06 Portland Cement for Road and Site Facilities and Specification 32 16 13 Concrete Sidewalks and Curbs and Gutter, concrete strength = 3,500 psi

17. Regarding Section 26 13 00, Para 2.2a, is every 600a 15KV NLB to have a 600-200a reducing interface bushing?

A: Reducing interface bushing is not typical on base.

18. Are all loop-fed pad mounted transformers required to have six 15KV insulated bushing standoffs and caps?

A: No, but all unused bushing must have insulating caps.

19. Section 33 71 023, Para 2.1.6 says PVC inner ducts are acceptable. Various communications duct bank notes on ES-101 to ES-120 state that (3) 3x3 Maxcell inner ducts shall be provided in one duct. Please clarify.

A: All innerduct shall be 3x3 Maxcell.

20. When comparing detail 7 on sheet C-501 with paragraphs 3.5.4 and 3.5.8.1 of section 33 71 02 it is difficult to determine the intended method of boring. For this application, we suggest installing a steel casing with Schedule 40 PVC conduits supported by bore spacers, then filling the bore interstices with a sand cement slurry or grout afterword. Please advise if this is acceptable.

A: Yes if more economical

21. Detail 1 on sheet E-503 shows a 2” spacing between like ducts. Section 33 71 02, para

3.5.9 says 3” spacing. Which is correct?

A: The specification is correct.

22. This project will have several million dollars of stored materials such as 15KV cable, pad mounted transformers, and pad mounted switches as well as PVC duct. Will the government pay for stored materials?

A: No, you will be paid for these items once they have been installed and the project inspector indicates with your progress report for that particular week.

23. Pleases state the actual system voltage and whether the system is delta or wye configuration.

This information is needed to price the pad mounted transformers correctly.

A: 12470/7200 delta

24. Please state the fuse ratings for the new pad mounted switch tap positions.

A: 120A for #2

25. Is there a staging area for material and where?

A: Yes, there will be a staging area for the materials after the contract is awarded and once a NTP/Pre-Construction is conduced. The location of the staging area will be determined after contract award and the Government will make every effort to make it in close proximity of the work area for Circuit 7.

26. Will a construction trailer be allowed and where?

A: Yes, a construction trailer will be allowed. The location of the trailer will be determined after

27. The RFP calls for Part I, Part II, and Part III. Is it desired that these are submitted in three separate binders, or as three tabbed sections in one binder?

A: No Government preference.

28. On the site lighting drawing fixture schedule, it calls for Sheppard to provide some of the fixtures that are apparently in their store room. It also calls for the contractor to provide the fixtures that Sheppard does not have available. Please provide a total estimated number of fixtures Sheppard has on hand as well as a manufacturer and part number for the poles we are to match.

A: Currently Government has 36 fixtures (Cree RW9339, 480V bronze) stored.

29. Currently the wage determinations provided on this project are for low voltage wages? The work primarily consists of High Voltage work. Please confirm if the wage rates below are correct.

ELECTRICIAN Excluding Low Voltage Wiring......................$ 23.84 3.5%+8.40 Low Voltage Wiring Only.................................................$ 23.84 3.5%+8.40

A: High voltage work is included in the excluding low voltage determination.

30. In areas that trenching is required will the GC be able to utilize directional boring to produce cost savings for the government and require less patching and repairing?

A: Yes.

31. Will the government allow air/vacuum potholing in lieu of hand digging for existing utilities.

This method has been utilized extensively and found to be the best way to avoid potentially damaging underground utilities & communication lines while performing this work. (Example:

http://www.ultrasafedig.com/air-vac/ <http://www.ultrasafedig.com/air- vac/> )

32. Has a site visit been conducted. If so can you please post the sign in sheet for reference.

A: Yes. The sign-in sheet is available on FBO.

33. Is the GC able to salvage any items on this project or will the Government request certain items to remain on base like utility poles, wire etc.?

A: Return to the Government transformers from the following facilities: 400A, 400B, 430, 450, 540, 551, 558, 632, 634A, 690, & 740.

34. Will the government be providing existing as-builts of site underground utilities prior to bid closing?

35. Will the contractor be responsible for marking and verifying all underground utilities?

SECTION 01 00 00 Page 5 Para 1.9.1: "Notify the contracting officer at least 72 hours prior to starting excavation work. Contractor is responsible for marking and verifying all utilities not marked."

36. Can the Government provide the contractor with a list of the areas/buildings that outages and connections will need to be scheduled outside of regular working hours? SECTION 01 00 00 Page 5 Para 1.9.1 "Utility outages and connections required during the prosecution of work that affect existing systems shall be arranged for at the convenience of the Government and shall be scheduled outside the regular working hours or on weekends." Contractor shall not be entitled to additional payment for utility outages and connections required to be performed outside the regular work hours.

A: No, every necessary outage shall be scheduled individually during construction with the Government.

37. Will ground penetrating radar, electromagnetic or sonic scanning be required as shown in the paragraph below? SECTION 01 00 00 Page 5 Para 1.10 LOCATION OF UNDERGROUND UTILITIES Obtain digging permits prior to start of excavation by contacting the Contracting Officer 15 calendar days in advance. Scan the construction site with ground penetrating radar and electromagnetic or sonic equipment, and mark the surface of the ground, pier deck or paved surface where existing underground utilities or utilities encased in pier structures are discovered.

Verify the elevations of existing piping, utilities, and any type of underground or encased obstruction not indicated to be specified or removed but indicated or discovered during scanning in locations to be traversed by piping, ducts, and other work to be conducted or installed. Verify elevations before installing new work closer than nearest manhole or other structure at which an adjustment in grade can be made.

38. Will the contractor be responsible for coordinating with other base organizations to get approval and completion of the AF Form 103? SECTION 01 00 01 Page 1 Para 1.2:

WORK CLEARANCE REQUEST a. The Contractor shall obtain and process an AF Form 103, Base Civil Engineer Work Clearance Request. The Contractor shall go to the work order service desk (Self Help, Building 1402) in order to start the AF Form 103, and then coordinate with the other base organizations to properly complete the form and get it approved. One copy of the approved AF Form 103 shall be provided to the project inspector prior to commencement of any work for the project.

39. Will the contractor be responsible for pressure washing locate marks placed by Base CE and other utility locate subcontractors? SECTION 01 00 01 Page 1 Para 1.2 WORK CLEARANCE REQUEST e. Special care and coordination shall be taken in any high- visibility area so as not to unnecessarily damage surfaces. The Contractor shall consult with the CE representative before any markings are placed in these areas. In all high- visibility locations, the paint used to locate utilities will be fully removed from sidewalks, pavements, and plazas at the end of the project.

The Contractor shall be responsible for any damage.

40. We will have a great deal of material and equipment on this project. Are laydown / staging areas going to be made available? SECTION 01 00 01 Page 3 Para 1.10 CONTRACTOR STORAGE/LAYDOWN YARD There is no designated Contractor Storage/Laydown Yard provided at SAFB. To the extent possible and when possible, the Contractor is encouraged to use the job site for staging materials. The Contractor is advised that an off-base storage/staging area may be useful for execution of some projects. Security shall be the responsibility of the Contractor in all cases. The Government has no liability for materials or equipment that becomes lost or damaged. SECTION 01 50 00 Page 6 Para 3.4.3 Storage Area Upon Contractor's request, the Contracting Officer will designate an area for the Contractor's use and storage of trailers, equipment, and materials. This area may not be in close proximity of the construction site but will be within the installation boundaries. Fencing of materials or equipment will not be required at this site; however, the Contractor is responsible for cleanliness and orderliness of the area used and for the security of any material or equipment stored in this area. Utilities will not be provided to this area by the Government.

A: Yes, there will be a staging area for the materials after the contract is awarded and once a NTP/Pre-Construction is conduced. The location of the staging area will be determined after

41. Will sniffers be acceptable instead of forced air ventilation? SECTION 01 35 26 Page 18

3.9 WORK IN CONFINED SPACES b. Forced air ventilation is required for all confined space entry operations and the minimum air exchange requirements must be maintained to ensure exposure to any hazardous atmosphere is kept below its' action level.

42. If water is to be provided by government will an air gap be acceptable instead of a backflow preventer? SECTION 01 50 00 Page 2 Para 1.4 BACKFLOW PREVENTERS CERTIFICATE Certificate of Full Approval from FCCCHR List, University of Southern California, attesting that the design, size and make of each backflow preventer has satisfactorily passed the complete sequence of performance testing and evaluation for the respective level of approval. Certificate of Provisional Approval will not be acceptable. Para 1.4.1 Backflow Tester Certificate Prior to testing, submit to the Contracting Officer certification issued by the State or local regulatory agency attesting that the backflow tester has successfully completed a certification course sponsored by the regulatory agency. Tester must not be affiliated with any company participating in any other phase of this Contract. Para 1.4.2 Backflow Prevention Training Certificate Submit a certificate recognized by the State or local authority that states the Contractor has completed at least 10 hours of training in backflow preventer installations. The certificate must be current.

43. Can the environmental manager perform other tasks i.e. QC or SSHO? SECTION 01 57

20.00 10 Page 5 Para 1.9 CONTRACTOR'S ENVIRONMENTAL MANAGER Designate an on-site Environmental Manager responsible for overseeing the environmental goals for the project and implementing procedures for environmental protection. Para 1.9.1 Duties The Environmental Manager shall be responsible for the following: a. Compliance with applicable federal, state, and local environmental regulations, including maintaining required documentation. b. implementation of the Waste Management Plan. c. Implementation of the Indoor Air Quality (IAQ) Management Plan. d. Implementation of the Environmental Protection Plan. e. Environmental training for Contractor personnel in accordance with their position requirements. f. Monitoring and documentation of environmental procedures. Para 1.9.2 Qualifications Minimum five (5) years' construction experience on projects of similar size and scope; minimum two (2) years' experience with environmental procedures similar to those of this project; familiarity with Environmental Management Systems (EMSs); familiarity with environmental regulations applicable to construction operations.

44. There are trees that are in the alignment path and over excavation/bench areas of the project excavation. What type size and number of trees are to be provided by the contractor? SECTION 01 57 20.00 10 Page 13 Para 3.2.6 Tree and Plant Protection Protect as specified in Division 2 EXISTING CONDITIONS and as specified. Prior to start of construction, tag each tree and plant scheduled to remain. In the event of damage to tree or plant, the Contractor will replace the damaged tree or plant as directed by the Contracting Officer. SECTION 01 57 20.00 10 Attachment 1 Page 10 Para 5.19 TREES, SHRUBS, AND HEDGES: The contractor shall supply and plant replacement trees, shrubs and hedges damaged due to project related activities. Smaller plants including shrubs, hedges or trees up to 5" DBH, damaged due to project related activity or during planting shall be replaced with plants of equal or greater size, type, and value (including historic value). Larger trees damaged during construction shall be recompensed by a number of smaller trees based on DBH or with an aggregate area of noon shade equal to the noon shade area of the larger tree. The contractor shall stake and berm trees using standards published by the local County Extension Office. All trees must be planted between 1November and 1 April unless otherwise authorized by the CO.

A: Number and type of trees provided will be the same as the number and type of trees damaged.

45. Will four sets of cylinders be acceptable instead of 6? Breaking one at 7 days, one at 28 days and holding two in reserve. SECTION 03 31 01.00 10 Page 12 Para 3.3.1.6 Compressive- Strength Specimens Obtain samples and test concrete for quality control during placement.

Sample fresh concrete for testing in accordance with ASTM C172/C172M. Make six test cylinders. Test concrete for compressive strength at 7 and 28 days for each design mix and for every 100 cubic yards of concrete. Test two cylinders at 7 days; two cylinders at 28 days; and hold two cylinders in reserve.

46. In areas that we are excavating and may undermine an existing building or foundation, will shoring need to be designed by a registered engineer? SECTION 31 23 00.00 20 Page 6 Para

3.1.1 Shoring and Sheeting Provide shoring trench boxes where indicated. In addition to Section 25 A and B of EM 385-1-1 and other requirements set forth in this contract, include provisions in the shoring and sheeting plan that will accomplish the following: a. Provide for the safety of all personnel at all times. b. Prevent undermining of pavements, foundations and slabs. c. Prevent slippage or movement in banks or slopes adjacent to the excavation.

47. Is dry boring the only method the government will accept? SECTION 31 23 00.00 20 Page 11 Para 3.10.2 PVC Case Conduits Install casing by dry boring and jacking method as follows:

Para 3.10.2.1 Hole for Pipeline Casing Mechanically bore holes and case through the soil with a cutting head on a continuous auger. Do not use water or other fluids in connection with the boring operation.

A: Wet boring is acceptable.

48. Can the specification listed below be changed to one American Concrete Institute (ACI) Flatwork Finisher certified craftsman on site overseeing the placement crews?SECTION 32 13

13.06 Page 4 Para 1.5.2 Contractor Qualifications Unless waived by the Contracting Officer, the Contractor shall meet one of the following criteria: a. Contractor shall have at least one National Ready Mixed Concrete Association (NMRCA) certified concrete craftsman and at least one American Concrete Institute (ACI) Flatwork Finisher Certified craftsman on site, overseeing each placement crew during all concrete placements. b. Contractor shall have no less than three NRMCA certified concrete installers and at least two American Concrete Institute (ACI) Flatwork Finisher Certified installers, who shall be on site working as members of each placement crew during all concrete placement.

49. Can the destructive testing listed in the following specification be removed and replaced with visual inspection at the time of placement? SECTION 32 13 13.06 Page 16 Para 3.7.6 Test for Pavement Thickness Full depth cores of 4 inch diameter shall be taken of concrete pavement every 2000 square feet to measure thickness.

50. Do the cable supports (RACKS, ARMS AND INSULATORS) need to be hot dip galvanized? SECTION 33 71 02 Page 16 Para 2.13 CABLE SUPPORTS (RACKS, ARMS, AND INSULATORS) The metal portion of racks and arms must be zinc-coated after fabrication.

A: To clarify, this Para is asking for hot-dipped galvanized with Zinc – not Zinc electroplating.

51. Will conduit cleaning and mandreling be required as shown below? SECTION 33 71 02 Page 20 Para 3.5.3 Conduit Cleaning As each conduit run is completed, for conduit sizes 3 inches and larger, draw a flexible testing mandrel approximately 12 inches long with a diameter less than the inside diameter of the conduit through the conduit. After which, draw a stiff bristle brush through until conduit is clear of particles of earth, sand and gravel; then immediately install conduit plugs. For conduit sizes less than 3 inches, draw a stiff bristle brush through until conduit is clear of particles of earth, sand and gravel; then immediately install conduit plugs.

52. Can the 120” cover depth to the top of conduit in non-paved areas be reduced? Also see question 27. SECTION 33 71 02 Page 22 Para 3.5.8.1 Directional Boring Under Paved Roads HDPE conduits must be installed below the frost line and as specified herein. For distribution voltages greater than 1000 volts and less than 34,500 volts, depths to the top of the conduit must not be less than 48 inches in pavement-covered areas and not less than 120 inches in non-pavement-covered areas. For distribution voltages less than 1000 volts, depths to the top of the conduit must not be less than 48 inches in pavement- or non-pavement-covered areas. For branch circuit wiring less than 600 volts, depths to the top of the conduit must not be less than 24 inches in pavement- or non-pavement-covered areas.

A: Yes, in unpaved areas 36” to top of conduit encased in concrete for voltages 1000 volts and greater.

53. In some locations through paved and unpaved areas, the depth of the duct bank and the alignment of other utilities will make it necessary to slope the excavation 1.5 to 1, since a trench box cannot be utilized and to comply with OSHA safety requirements. This will cause the area excavated at the surface to be over 40’ in some places and over 60’ when spoil stockpiles are considered. Decreasing the depth will decrease the area disturbed and will save a considerable amount of time and money, especially in the paved areas. Can the electrical duct banks be raised to a shallower elevation?

A: Yes, 36” to top of conduit in unpaved areas.

54. We would like to encase the communication and power conduit in the same concrete by closing the distance between them.

55. Is it necessary to separate the Communication and Power 12" min. with the primary power concrete encased?

56. When the note says "manhole shall be abandoned in place". Does the cover and ring remain also?

57. Will the street lighting conduit be placed in the road bore casings or are they to be open cut across the roads as shown?

A: In bore casings

58. On drawing page C-102, sheet 4 of 124, proposed duct bank alignment A-1, shows two lines marked EPU(ID) between the manhole at STA 1+00 and the manhole at STA 3+35.49. This condition is shown on many other locations on the drawings. Is this to be two separate duct banks or additional conduit encased in the new duct bank?

A: Can be a common DB for power conduits. Indicated as two lines to designate the circuit going out to two different locations as indicated on the site plan(s).

59. There is no general conditions line item on the construction cost estimate, where do you want us to include it?

A: Government suggests a new line. Please note, the construction cost estimate sheet is only a reccomendation and contractor may add/delete as they determine neccesary.

60. There will be many Road Closures/parking lot closures will Gov’t be flexible?

A: Yes. (Every necessary closure shall be scheduled individually with the Government.)

61. Several Paths need to be realigned to avoid foundations and old growth trees, is the Gov’t flexible?

62. Does a Safety Officer have to be present at each excavation location?

A: As required by the CO.

63. If directional boring is more economical than open cut will the Gov’t accept modification to the drawings?

64. Sheet 106, E-501. All 4 details say "TYPICAL". Do you want us to price the grounding per these details?

A: No. Pad-mounted switches: provide 2 ground rods (2-3/4”x10’) in each cable compartment (4 total); readings must be lower than 25 ohms.

65. Sheet 107, E-502. All details say "TYPICAL". Do we price the grounding, pads, etc., per these TYPICAL details?

Sheet 108, E503. TYPICAL Hand Hole detail. 8" thick walls and 12" deep gravel pit under it.

Do we price per this TYPICAL detail?

Sheet 108, E-503. TYPICAL Man Hole detail. Shows 10" thick walls. Do we price per TYPICAL detail?

The paragraph shown below states that system coordination, recommended ratings and settings of protective devices, and design analysis shall be accomplished by a registered electrical engineer. Is this to be included in the Scope of work and pricing for this project? Section 26 28

01.00 10 Para 1.4.1 System Coordinator System coordination, recommended ratings and settings of protective devices, and design analysis shall be accomplished by a registered professional electrical power engineer with a minimum of 3 years of current experience in the coordination of electrical power systems. Submit verification of experience and license number, of a registered Professional Engineer as specified above. Experience data shall include at least five references for work of a magnitude comparable to this contract, including points of contact, addresses and telephone numbers.

Sheet 4 thru 34 of 124, all have the same excavation notes that will require additional cost for design. Do we make a new breakdown bid line item for it, or add it in with the excavation costs?

A: The construction cost estimate sheet is only a reccomendation and contractor may add/delete as they determine neccesary.

66. Sheet 108, E-503. Typical duct bank detail. Is reinforcement steel required throughout the full length of the duct bank, or just 20ft out of the manhole?

A: Reinforcement is only required under paved surfaces.

67. The duct bank trench elevations are averaging 8 to 9ft deep. This will make the inside height of the Man Holes approximately 10 to 11ft. Can we decrease the duct bank trenching depth?

A: Yes, 36” to top of conduit in unpaved areas.

68. Some of the existing transformer pads get replaced prior to the new transformer being set in place. This will require the outage to be for several days. Will this become an issue for the building occupants?

A: Yes. (Every necessary outage shall be scheduled individually with the Government.)

69. Will the Government supply temporary generators for buildings during extended shut downs of the power?

70. How many grounding rods are required for Transformers?

A: Provide 2 ground rods (2-3/4”x10’) one on primary side and one on secondary side; readings must be lower than 25 ohms.

71. How many grounding rods are required for Switch gears?

A: Provide 4 ground rods (4-3/4”x10’) two in each cable compartment; readings must be lower than 25 ohms.

The following questions are still pending review and will be answered at a later date via amendment and posting to FBO.

In paved areas are we to cut out the existing paving to install the additional grounding shown on the drawings.

Are there areas to be excavated that are in known ground water contamination plumes which will require special handling?

Can the slump range shown be changed to 4”+ 1”? SECTION 32 16 13 Page 3 Para 2.1.2 Slump The concrete slump shall be 2 inches plus or minus 1 inch where determined in accordance with

ASTM C143/C143M.

Does the directional boring Certificate of Conformance need to be completed by a surveyor?

SECTION 33 71 02 Page 7 Para 1.4.4 Directional Boring Certificate of Conformance Provide certification of compliance with the registered Professional Engineer's design requirements for each directional bore, including: HDPE conduit size and type, bend radius, elevation changes, vertical and horizontal path deviations, conductor size and type and any conductor derating due to depth of conduit. Record location and depth of all directional-bore installed HDPE conduits using Global Positioning System (GPS) recording means with "resource grade" accuracy.

Note 2, page 4 thru 34, on the drawings allows for the communication conduits and the electrical conduit to merge into the same bore casing.

In the statement of work, Para 5.3, it says that the following items require the same reporting and approval requirements as Hazardous Materials. Is this correct? Para 5.3 Hazardous Materials (HM): The contractor shall comply with all local, state and federal rules and regulations dealing the handling, storage and use of HM. A product, chemical or substance is a HM if listed or described in 49 CFR 172.101 and 40 CFR 302-304. Additionally, all paints, thinners, adhesives, refrigerants, solvents, acids, petroleum products (such as greases, oils, or other lubricants), compressed gases or similar materials are subject to the same reporting and approval requirements as HM, defined above.

Can this be removed from the specifications or do we need to use zinc-coated, rigid steel, jacked into place? SECTION 33 71 02 Page 21 Para 3.5.4 Jacking and Drilling Under Roads and Structures Conduits to be installed under existing paved areas which are not to be disturbed, and under roads and railroad tracks, must be zinc-coated, rigid steel, jacked into place. Where ducts are jacked under existing pavement, rigid steel conduit must be installed because of its strength.

To protect the corrosion-resistant conduit coating, predrilling or installing conduit inside a larger iron pipe sleeve (jack-and-sleeve) is required. For crossings of existing railroads and airfield pavements greater than 50 feet in length, the predrilling method or the jack-and-sleeve method will be used. Separators or spacing blocks must be made of steel, concrete, plastic, or a combination of these materials placed not farther apart than 4 feet on centers.

Can the density testing of bedding and backfill in trenches be decreased to one test per 100 linear feet per lift? SECTION 31 23 00.00 20 Page 12 Para 3.12.2.3 Density Tests Bedding and backfill in trenches: One test per 50 linear feet in each lift.

Can the density testing of bedding and backfill in trenches using an ASTM D1556 density test be decreased to one test per 30 ASTM D6938 density tests? SECTION 31 23 00.00 20 Page 12 Para

3.12.2.3 Density Tests Test density in accordance with ASTM D1556, or ASTM D6938. When ASTM D6938 density tests are used, verify density test results by performing an ASTM D1556 density test at a location already ASTM D6938 tested as specified herein. Perform an ASTM D1556 density test at the start of the job, and for every 10 ASTM D6938 density tests thereafter.

We have conflicting requirements for the PSI of the duct bank concrete is it to be 3000 psi or 3500 psi? SECTION 03 31 01.00 10 Page 3 Para 1.2.3 Concrete Strength Provide specified compressive strength of 3500 psi at 28 days: SECTION 33 71 02 Page 13 Para 2.11 CAST-IN- PLACE CONCRETE Provide concrete in accordance with Section 03 31 01.00 10 CAST-IN- PLACE STRUCTURAL CONCRETE FOR CIVIL WORKS. In addition, provide concrete for encasement of underground ducts with 3000 psi minimum 28-day compressive strength.

Concrete associated with electrical work for other than encasement of underground ducts must be 4000 psi minimum 28-day compressive strength unless specified otherwise.