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1 <br /> <br />1 <br /> <br />1 <br /> <br /> <br />t <br />1 <br />1 <br />1 <br /> <br />1 <br /> <br /> <br />1 <br /> <br /> <br />September 28, 1998 <br />M. Any liner replacement that is required due to damage from the Contractor's <br />operations or negligence to adequately protect the liner during installation will be <br />made at no additional cost to the Owner. <br />N. Slack length in the HDPE liner shall be determine by the installer based on the <br />temperature at the time of installation to allow for cold weather contraction. <br />3.3 FIELD SEAM TESTING/QUALITY CONTROL <br />A. The installer shall employ on-site physical non-destructive continuous testing on all <br />field seams to ensure watertight homogeneous seams in accordance with ASTM D- <br />4437. Acceptable methods are: <br />1. Vacuum Chamber Test <br />2. Double Seam Pressurization Test (for HDPE or LLDPE material with double <br />wedge seam) <br />3. Ultrasonic (High Frequency) Pulse Echo Testing <br />4. Mechanical Point Stressing (qualitative measure of edge bonding only) <br />B. A quality control technician shall inspect each seam. Any area showing a defect <br />shall be clearly marked in the field and repaired in accordance with approved <br />procedures. The locations and types of defects shall be indicated on the QA/OC <br />drawings. <br />C. A test seam 2 feet long shall be run each day, prior to liner seaming and under the <br />same conditions as exist for the seaming. The test seam shall be marked with date, <br />ambient temperature, and welding machine number. Sample coupons shall be cut <br />from the test seam and pulled in shear and peel. The tensile yield strength of all <br />seams shall be a minimum of 90 percent of the tensile yield strength of the parent <br />material. Failure of the seam in peel shall exhibit Film Tear Bond (FTB). Random <br />samples shall be removed from the seams of the installed sheeting at an average <br />frequency of one per 500 feet of seam, at locations designated by the Owner's <br />Representative. These samples shall also be tested in shear and peel. Shear <br />strength of seams for 60-mil HDPE shall be equal to or greater than 120 pounds per <br />in (Ibs/in) and the peel strength shall be equal to or greater than 75 Ibs/in when <br />tested in accordance with ASTM D-4437. Any seams failing such tests shall be <br />repaired using approved methods, and retested, to the satisfaction of the Owners <br />Representative. <br />3.4 WARRANTY AND GUARANTEE <br />A. The manufacturer/installer shall guarantee the liner installation for a period of two <br />years, during which time the liner materials and workmanship specifically provided <br />t J \5661\SPECSFNL WPD <br />Geosynthetic Liners <br />02770-4 <br />