Results of treatment

Results of treatment -
(1) Penetration and retention. The quality control supervisor shall test or supervise the testing of each treated charge for penetration and retention.
(2) Method of sampling. When testing penetration and retention, a borer core shall be taken from a minimum of 20 arms in each treating charge. The borings shall be taken from any face except the top face at a point as close to the end as possible, being at least 3 inches from the end of the arm and no closer than 3 inches from the edge of the holes. The bored holes shall be plugged with treated plugs. Borings from laminated arms shall not be taken from the same laminate unless there is an end joint separation.
(3) Preservative penetration. All of the sapwood present in Douglas-fir and southern yellow pine arms shall be completely penetrated with preservative. Preservative penetration in the heartwood of Douglas-fir arms shall be not less than 3 inches longitudinally from the edge of holes and ends, and at least 3/16 inch from the surface of any face.
(4) Preservative retention. Preservative retention in the outer 0.6 inch for Douglas-fir arms and in the outer one inch of southern yellow pine arms shall be not less than the following:
(1) Penetration and retention. The quality control supervisor shall test or supervise the testing of each treated charge for penetration and retention.
(2) Method of sampling. When testing penetration and retention, a borer core shall be taken from a minimum of 20 arms in each treating charge. The borings shall be taken from any face except the top face at a point as close to the end as possible, being at least 3 inches from the end of the arm and no closer than 3 inches from the edge of the holes. The bored holes shall be plugged with treated plugs. Borings from laminated arms shall not be taken from the same laminate unless there is an end joint separation.
(3) Preservative penetration. All of the sapwood present in Douglas-fir and southern yellow pine arms shall be completely penetrated with preservative. Preservative penetration in the heartwood of Douglas-fir arms shall be not less than 3 inches longitudinally from the edge of holes and ends, and at least 3/16 inch from the surface of any face.
(4) Preservative retention. Preservative retention in the outer 0.6 inch for Douglas-fir arms and in the outer one inch of southern yellow pine arms shall be not less than the following:

Source

7 CFR § 1728.201


Scoping language

None
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