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Material specifications should conform to [http://www.raqsb.mto.gov.on.ca/techpubs/OPS.nsf/0/2ccb9847eb6c56738525808200628de1/$FILE/OPSS%201860%20Apr12.pdf Ontario Provincial Standard Specification (OPSS) 1860 for Class II geotextile fabrics].
Material specifications should conform to [http://www.raqsb.mto.gov.on.ca/techpubs/OPS.nsf/0/2ccb9847eb6c56738525808200628de1/$FILE/OPSS%201860%20Apr12.pdf Ontario Provincial Standard Specification (OPSS) 1860 for Class II geotextile fabrics].
*Fabrics should be woven monofilament or non-woven needle punched.
*Fabrics should be woven monofilament or non-woven needle punched.
*Woven slit film and non-woven heat bonded fabrics should not be used as they are prone to clogging.
*Woven slit film and non-woven heat bonded fabrics should not be used, as they are prone to clogging.
<p>Primary considerations are:
<p>Primary considerations are:
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