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(psi). This pressure shall be maintained during cement emplacement and the cement set up period <br />for 8 hours following the grout stage completion. Clear water shall be circulated within the casing from <br />bottom to top to cool the casing during the set-up period. <br /> <br /> <br />If tremie pipe method will be used to grout the liner casing. Can a K- Packer be used with a minimum <br />of two grout lifts? Also, if cool water is to be introduced into the liner to avoid excessive heat it will not <br />be possible to pressurize the well to 60PSI. Please confirm final line casing size. <br /> <br />Response: K-packer can be used with a minimum of two lifts. Final liner size is 18-inch in lieu of <br />the 20-inch diameter. <br /> <br />7.Grout <br /> <br />Section 03400 Part 1.2 <br />B. Provide bulk cement units weight tickets for verification of cement quantities pumped. <br /> <br />Section 03400 Part 2.1 <br />B. Ready-mixed cement will not be allowed for this project unless otherwise approved by the OWNER <br />or ENGINEER. <br /> <br />Bulk weight tickets are provided by ready mix services. Please clarify if we are able to use to use bulk <br />mix cement? <br /> <br />Response: Contractor is allowed to use bulk mix cement. <br /> <br /> <br />8.Section 03200 <br /> <br />Section 1.2 Subpart B <br />B. Casing liner and dimensions are provided in the well construction specifications or details. The well <br />casing liner shall be at a minimum, poly vinyl chloride (PVC) Schedule 40 where PVC casing liner is <br />required. <br /> <br />Section 2.2-part A <br />Certa-Lok SOR 17 locked coupling PVC casing or equivalent. Any equivalent casing selected must <br />be shown to have sufficient joint and tensile strength, internal pressure rating, resistance to collapse <br />and ability to withstand all stresses of construction. Any alternates must be approved in advance by <br />the ENGINEER. <br /> <br />Reference is made to two different types of casing. Can we assume SCHD 40 PVC bell end casing <br />will be used? This type of pipe will reduce cost and will be sufficient for the casing depths at the site. <br />Also note the largest diameter SOR 17 has a pipe of ID of 15" while 18" DIA SHCD 40 PVC has an ID <br />of approx. 16.8". <br /> <br />Response: 18" DIA SHCD 40 PVC shall be used. <br /> <br />North Bay Road Drainage Improvements <br />Invitation to Bid No. 18-04-01 <br />Response to Questions Page 2 <br /> <br />