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CC`� R E ` I while rain is falling, or when there is water on the surface to be covered . Once the rain has rL stopped and water has been removed from the tacked surface to the satisfaction of the Engineer and the temperature of the mixture caught in transit still meets the requirements as specified in 330-9 . 1 . 2 , the Contractor may then place the mixture caught in transit. 330-9 . 1 .4 Speed of Paver : Establish the forward speed of the asphalt paver based on the rate of delivery of the mix to the roadway but not faster than the optimum speed needed to adequately compact the pavement . 330-9 . 1 . 5 Number of Crews Required : For each paving machine operated, use a separate crew, each crew operating as a full unit . The Contractor ' s CTQP Paving Level H technician in charge of the paving operations may be responsible for more than one crew but must be physically accessible to the Engineer at all times when placing mix . 330-9 . 1 . 6 Checking Depth of Layer : Check the depth of each layer at frequent intervals , and make adjustments when the thickness exceeds the allowable tolerance . When making an adjustment, allow the paving machine to travel a minimum distance of 32 feet to stabilize before the second check is made to determine the effects of the adjustment. 330-9 . 1 .7 Hand Spreading : In limited areas where the use of the spreader is impossible or impracticable , the Contractor may spread and finish the mixture by hand. 330-9 . 1 . 8 Straightedging and Back-patching : Straightedge and back-patch after obtaining initial compaction and while the material is still hot. 330-9 . 2 Requirements Applicable to Courses Other Than Leveling . 330-9 .2 . 1 Spreading and Finishing : Upon arrival , dump the mixture in the approved mechanical spreader, and immediately spread and strike -off the mixture to the full width required, and to such loose depth for each course that, when the work is completed, the required weight of mixture per square yard, or the specified thickness , is secured. Carry a uniform amount of mixture ahead of the screed at all times . 330-9.2 .2 Thickness and Spread Rate of Layers : Construct each course of Type SP mixtures in layers of the thickness shown in Section 334 . When the deficiency of the average spread rate for the total course pavement thickness measured in accordance with 330-2 . 2 exceeds the following maximum spread rate tolerance, address the deficient area in accordance with 330 - 12 . 5 . 1 . Structural Course (non- friction) a. For pavement of a design thickness of 2 - 1 /2 inches or more : plus or minus 50 lbs per sy. b . For pavement of a design thickness of less than 2 - 1 /2 inches : plus or minus 25 lbs per sy. 2 . Friction course a. For open grade friction course : plus or minus 15 lbs per sy. b . For dense grade friction course : plus or minus 25 lbs per Sys As an exception, the Engineer may allow the Contractor to leave areas in place if it is determined by the Engineer that the deficiency is not a significant detriment to the pavement quality . A reduction to the pay item quantity will be made in accordance with 330 - 12 . 5 . 2 . 330-9 .2 .3 Laying Width : If necessary due to the traffic requirements , lay the mixture in strips in such a manner as to provide for the passage of traffic . As an option, where the road is closed to traffic , lay the mixture to the full width with machines traveling in echelon . - 73 - FPID ( S ) : 423186 - 1 - 5 8 - 01