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• <br /> • <br /> Table 2 -- Description of Waste Storage Pond Liners <br /> (See table 1 for conditions requiring a liner). <br /> Class Description <br /> A Compacted earth consisting of material of which 50% or more " <br /> " passes the #200 sieve, a plasticity index P.I. <br /> and a resulting ( ) of 7 or more,. ��+ - <br /> permeability of 1x10-7 cm/sec (2.83x10-4 ft/ <br /> day) or less. Minimum thickness is 24" on pond sides, 18 _ <br /> Y _ inches on bottom, _and compacted to 90% of standard proctor <br /> F density. <br /> Compacted earth consisting of material of which 50% or more <br /> passes the #200 sieve, and which has a P.I. of 7 or more. <br /> Minimum thickness is 30" on pond sides; 24 inches on pond <br /> bottom, and compacted with maximum 6" lifts in a manner that <br /> every point on the surface of each lift is traversed by not <br /> less than one tread width of the loaded equipment (or equiva- <br /> lent compaction). <br /> C '` Reinforced concrete containing a minimum. <br /> ' <br /> of 6"x6" x 1� <br /> welded wire fabric with 5" thickness of concrete. Concrete ato <br /> be 3000 psi minimum. Water stops must be utilized at all con- <br /> struction joints. <br /> D Flexible membrane with minimum thickness of 20 mil . _ <br /> liner applicable only when in soils with 25% or more passing `- <br /> #200 sieve and no bedrock within 3 feet of the finer. ) <br /> E Flexible membrane with minimum thickness of 30 mil . <br /> Class D and E liners will require manufacturer's statement on life ex ec <br /> Installation to be with company supervision. P tancy. <br /> USDA-SCS-Wisconsin <br /> Section IU <br /> Technical Guide <br /> 10/83 <br />