54 



1 MARVIN ALLUM 



2 CHAIRMAN STEIN: You may proceed, Mr. Allum. 

 S MR. ALLUM: Thank you. 



4 OYSTER LARVAE STUDIES 



5 The Project conducted tv>o investigations 



6 using the larvae of the Pacific oyster as the test organisms. 



7 One of these studies was a field sample study to measure 



8 the response of the oyster larvae to surface water samples 



9 collected throughout each of the four study areas, and 



10 the other study was conducted to determine the effects 



11 on the larvae of the various individual waste streams 



12 from each of the mills and thus determine the relative 



13 toxicity of the waste components at each mill. The 



14 effluents of oil refineries at Mark Point near Anacortes 



15 were also tested by this method. 



16 The field sample study was initiated in 



17 May 1963 and was terminated in August of 1965. Surface 



18 samples of water in the field samples were collected at 



19 monthly intervals from various stations in the four study 



20 areas. Extra sets of samples were collected from some of 



21 these stations on July 6, after a three-day 4th of July 



22 holiday, in which production was shut down, and again in 



23 November of 1964, during the period when most of the mills 



24 in the study areas were closed because of a labor strike, 



25 to evaluate water quality changes occurring during the mill 



