Red pine coupons treated with chromated copper arsenate (CCA-C), ammoniacal copper arsenate (ACA), modified ammoniacal coper arsenate, ammoniacal copper zinc arsenate (ACZA) and ammoniacal zinc arsenate (AZA) to various retention levels have been in service for 14 years at the West Vancouver marine test site. Similar coupons treated with CCA-C, ACA and creosote have been in service for apporximately 8 years at Shediac Bridge and Whitehead Island, the two marine test sites in New Brunswick. This report summarizes the performance results to date ant attempts to compare relative performances of the various preservatives in Atlantic and Pacific coastal waters.