7. Sampling
7.1 Lot Sample—As a lot sample for acceptance testing,
take at random the number of rolls of geotextile directed in an
applicable material specification or other agreement between
the purchaser and the supplier. Consider rolls of geotextile to
be the primary sampling units. If the specification requires
sampling during manufacture, select the rolls for the lot sample
at uniformly spaced time intervals throughout the production
period.
NOTE 4—An adequate specification or other agreement between the
purchaser and the supplier requires taking into account the variability
between rolls of geotextile and between specimens from a swatch from a
roll of geotextile so as to provide a sampling plan with a meaningful
producer’s risk, consumer’s risk, acceptable quality level, and limiting
quality level.
7.2 Laboratory Sample—Take for the laboratory sample a
full roll width sample extending a minimum of 1 m along the
selvage from each sample roll such that the requirements of
Section 9 can be met. Take a sample that will exclude material
from the outer wrap of the roll or the inner wrap around the
core unless the sample is taken at the production site, at which
point inner and outer wrap material may be used.