REV15278

• Permit No: M1980244
• IBM Index Class Name: Revision
• Doc Name: RELEVANT SECTIONS FROM FINAL REPORT CRESSON PROJECT QUALITY ASSURANCE MONITORING AND TEST RESULTS
• Type & Sequence: TR33
• Media Type: D
• Archive: No

3. CONTRACTOR shall place Drain Cover Fill in a single 24-inch loose lift.
The tracked equipment shall operate only over previously-placed Drain
Cover Fill. CONTRACTOR shall not operate equipment directly on
geosynthetics. Only a dozer with a ground pressure not exceeding 8.7 psi
can be used to place Drain Cover Fill. A CAT 12G motor grader, or
equivalent approved by CERTIFYING ENGINEER, can be used for Drain
Cover Fill final grading. Equipment used for placement will not be allowed
[o pivot on one track (i.e., no abrupt or sharp turnsl. There shall be no
downhill placement on slopes steeper than 4H:1 V. Material can be placed
along contours if buttressed from below. Motor graders shall not be
allowed to make abrupt turns, brake suddenly, or dig blade in which
results in the tires spinning on the Drain Cover Fill surface.
4. Highway compatible Rubber tired construction equipment shall not be
allowed to travel over the geomembrane or on top of Solution Collection
piping unless a thickness of at least 45 inches of Drain Cover Fill has been
placed over the geomembrane and on [op of Solution Collection piping.
The CONTRACTOR will be required to demonstrate to the MANAGER,
DESIGN ENGINEER and CERTIFYING ENGINEER that the equipment and
procedures used are not detrimental to the geomembrane and piping, at no
cast to CC&V. Off road haul truck traffic shall require a minimum of 60
inches for Cat 773 (or equivalent) of Drain Cover Fill placed over the
geomembrane and solution collection piping, and a minimum of 120 inches
for CAT 777 for equivalent) of Drain Cover Fill placed over the
geomembrane and solution collection piping.
5. When placing Drain Cover Fill the maximum acceptable drop height is 3
feet.
6. CONTRACTOR shall operate equipment in a manner that is protective of
underlying geosynthetics. If MANAGER or CERTIFYING ENGINEER
suspects the occurrence of any damage to the underlying geosynthetics,
MANAGER will instruct CONTRACTOR to remove Drain Cover Fill to
expose the geosynthetics. CONTRACTOR shall uncover, repair any
observed damage of the underlying geosynthetics, in accordance with the
repair requirements of Sections 02776.0 and 02777.0 of these
SPECIFICATIONS, and recover, at no cost to CC&V.
7. CONTRACTOR shall place Drain Cover Fill at a rate such that no single
area of 350,000 square feet of geomembrane liner is exposed to
ultraviolet light for more than 180 days.
8. CONTRACTOR shall provide close continuous monitoring at the point of
placement during the placement of the Drain Cover Fill over geosynthetics.
9. CONTRACTOR shall verify the final thickness of Drain Cover Fill to
determine compliance with this SPECIFICATION. CONTRACTOR shall
record verification location, elevation, and thickness. CQA Monitor shall
witness all verification measurements. CONTRACTOR will submit a
method of verifying Drain Cover Fill depth to MANAGER for approval.
Grade markers shall be placed an a 50 foot by 50 foot grid with additional
points required for breaks in grade. CONTRACTOR shall remove all grade
markers under supervision of COA Monitor after verification measurements
have been approved by MANAGER and CERTIFYING ENGINEER and will
hackfill holes with Drain Cover Fill. Areas with deficient thickness shall be
Section 02200 Page 14 of 15 March Z, 1999
Earthworks GolderAssodates Revision 6