_REVISION - M1980244 ‎(30)‎

• Permit No: M1980244
• IBM Index Class Name: Revision
• Doc Name: Appendix E
• From: Cripple Creek & Victor Gold
• To: DMG
• Type & Sequence: AM8
• Media Type: D
• Archive: No

A. CONTRACTOR shall test a minimum of one destructive test sample per five hundred (500)
feet of seam length from a location specified by CERTIFYING ENGINEER.
CONTRACTOR shall not be informed in advance of [he sample location. The samples shall
be taken centered over the seam and prioritized as follows:
1. A minimum of one sample per day;
2. All areas identified as suspect during seaming non-destructive testing/monitoring,
and in unusual working conditions.
3. A minimum of one sample for each geomembrane seamer.
4. A minimum of one sample every five hundred (500) feet of seaming
B. Samples shall be cut by CONTRACTOR as the seaming progresses. Sampling locations
shall be determined by CERTIFYING ENGINEER. CQA Monitor must witness the
obtainment of all destructive test samples by CONTRACTOR. CONTRACTOR shall mark
all samples with their seam number, date, welding machine number, welding technician
identification, extruder and nozzle/wedge temperature, and ambient air temperature.
CONTRACTOR shall document the date, time, roll and seam number, ambient temperature,
and pass or fail description. All holes in the geomembrane resulting from obtaining the seam
samples shall be immediately repaired. All patches shall be vacuum tested.
C. The samples shall be a minimum twelve (12) inches wide by twenty-four (24) inches long with
the seam centered lengthwise. The sample shall be cut into two equal length pieces, half to be
given to CC&V and the other half kept by CONTRACTOR.
D. CONTRACTOR shall cut and test ten (10) one (1) inch wide specimens from his sample. All
testing shall be conducted at room temperature (60° F - 80° F) CONTRACTOR shall test
five (5) specimens for seam shear strength and five (5) for peel strength. Both inside and
outside tracks of fusion seams will be tested for peel strength. To be acceptable, four (4) out
of the five (5) specimens must pass according to criteria established in Article 2.01. Any
specimen that fails through the weld or at [he weld/sheet interface shall be considered a
failure, unless the weld strength exceeds the sheet strength, as discussed in Section 2776,
Item 2.01. The tensiometer shall have a grip separation of four (4) inches plus the width of the
seam. The seam is to be centered between the clamps. The grip separation rates for LLDPE
are twenty (20) inches per minute for shear and twenty (20) inches per minute for peel. These
tests shall not fail according to the criteria in Article 2.01.
E. CQA Monitor must witness the testing of all destructive samples. Destructive tests will be
performed within two (2) days of the samples being obtained.
Failing tests shall be subjected [o additional testing until a passing area is found. A passing
area is defined as a seam(s) bounded at each end by a passing destructive test. Seams will be
tracked in each direction until a passing destructive test is found or until a previous passing
destmctive lest is reached. Seams will be tracked according to the welding apparatus and the
machine operator. The following procedures shall apply whenever a sample fails the field
destructive test:
1. CONTRACTOR can retrace the welding path to an intermediate location (at a
minimum of ten (10) feet from the location of the failed test), at CERTIFYING
ENGINEER discretion, and take a small sample for an additional field test. [f this
test passes, then the seam shall be cap stripped between that location and the original
. failed location. If the test fails, the process shall be repeated.
Section 02776 Page 18 of 20 October 25, 2000
Geomembrane Golder Associates Revision 8
D:WHASEIV PSSA CERtWPPENDICIESUPPENDIX E TECHNICAL SPECIFICATIONS\W}:!p99p1)p61R8 DOC