01-26-98
B BORROW AND B BORROW FOR STRUCTURE BACKFILL
On contracts which require B borrow or B borrow for structure backfill, the Contractor shall have the option of either providing this material from a CAPP source or supplying the material from a pit meeting the requirements of 211 and with contractor gradation control. Thus, the Contractor has three options for supplying B borrow or B borrow for structure backfill from a pit.
(1)Establish a CAPP producer yard at the pit site;
(2)Contractor has gradations performed at a
recognize testing laboratory; or(3)Contractor has gradations performed by a CAPP
certified aggregate technician.
The frequency of gradation control for the Contractor shall be in accordance with the Department's Manual for Frequency of Sampling and Testing. The sampling and testing of the B borrow material shall be in accordance with applicable sections of 904 for fine and coarse materials. The costs of the contractor gradation control, including equipment, sampling, testing, etc. shall be included in the cost of the B borrow.
The Department testing may consist of random verification samples taken at the contract site.
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