Questions_and_Answers_v2.pdf

In paved areas are we to cut out the existing paving to install the additional grounding shown on the drawings. Yes, cut the existing paving as needed to install the grounding shown on plans.

Replace removed pavement to match existing.

Are there areas to be excavated that are in known ground water contamination plumes which will require special handling? Refer to geotechnical report for ground conditions.

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. Yes, the slump range can be changed to 4” +/- 1” as long as it meets strength.

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

Bid per specifications , an engineer. 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. Yes, concur.

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? Yes, bid per specifications. 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? Bid per specifications. 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? Bid per specifications. 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? Bid per specifications. 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? 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.