FIELD PERFORMANCE OF CCA TYPE-C NON-PRESSURE-TREATED NORTHERN WHITE CEDAR (THUJA-OCCIDENTALIS L.) SAPWOOD

Round posts of northern white cedar (Thuja occidentalis L.) non-pressu re-treated with a solution of 3 percent CCA type C were installed at a test site in Austin Cary Forest near Waldo, Florida in November 1978. When inspected in March 1996, samples with a CCA retention of 3.72 kg /m(3) showed almost no decay and no evidence of termite attack. Untrea ted samples and samples brush-coated with 3 percent CCA failed by the 12th year inspection. Samples with retentions of 1.21 or 0.80 kg/m(3) CCA showed beginning signs of decay and termite damage after 18 years of exposure.