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PublicationNo. 57400WA-14-0120
SKOOKtM INLET SURVEY
Donald U. PetersonRichard A. WagnerCharlesD. Ziebell
Supervisor,Survey & ResearchSenior BiologistBiologist
WASBDDTON POLLUTION CONIUCL CCN4ISSION
FebruarythroughAugust, 19%?
SKOOKUH IWLET SURVEY
Purpose oI~ the Survey
Since the spring ci’ 19=6,southernPuget Sound has been sampled extensively
fo the presence of sulfite waste liquor, presumably discharged from the Rayonier
Kicorporated operation at Shelton. ~ith recent improvements and modifications,
the analytical test for SWL ~s or~ ~iria11y developed by Pearl and Benson has in—
dic~ited consistent positive results in Oyster Bay, Skookum Inlet and other ~re~s
immediately adj~icent to the eritr~rnce of Haxnmersly Inlet,
The question h~s arisen as to the validity of these low concentrations and
whether or not such results could be due to “b~ckgraund” influences such as run-.
off from wooded ~re~s, lenchinr5 from log storage are~is, etc.
In ~n attempt to resolve this problem, ~ schedule of surveys w~s established
for Skookum Inlet to correspond with e series of shut—downs ~t the pulp mill.
Four stations were established in the Inlet (see Figure 1), ~nd s~mple3 were
collected tit the surface, mid—depth end bottom 2t e~=ch station. Sampling w~s con-
ducted only during the flood pha5e of the tide. Thirteen sampling trips were m&ie
during the course oI~ the survey; all stations being covered in trips 1 through 6,
3t~tions 26 and 26-A only in trips 7 through 12, and Station 26 only in trip 13.
923 s~mp1es were collected and analyzed for SVJL and chloririity.
Operations at the Rayonier, Thcorpcr&~ed. mill have been on an intermittent
basis for several months due to maAet conditions. There have been several shu±—
downs for varying periods of tii1~ ~nd two such periods were covered during the course
of the su~ey. Fo11awin~ i~ ~ list of shut~downs; those starred occurred during
the survey pe~4od.
December 23, 1~Vij Lo December31, 19j3 — inclusive
July 3, i9i( to July 17, 19~6 — inclusive
Septeraber2) 1~K to September ~, 19~6 — inclusive
November 1 , 19j6 tQ November 27, 19~6 — inclusiveP~ige 1
December 23, 1956 to January 6, 1957 - inclusive
~-February 2L, 1957 to Narch 17, 1957 — inclusive
.~April 20, 19=7 to Hay 19, 1957 - inclusive
~~June10, 1957 to June 30, 1957 - inclusive
August 9, 1957 to present date
The purpose of the eu vey then, was: To determine if a decrease in SWL
concentrations in Skookum Inlet would occur during a shut-down period with a
correspondingincreasein SIlL concentrations after the mill reeurnedoperations.
Analytical Procedure
All determinations for sulfite waste liquor concentrations were made by the
Pearl Benson method as modified by £. P. Collias of the OceanographyDepartmentof
the University of .Jash’ngton. The instrument used to measure colorimetric reactionr:
was a Beckman spectrophotomete , l4odel LU, set at a wave length of L20 millimicrons.
Survey flesults
All analytical results of the survey are reported in the tables at the end of
this report. The graphs (see Fioures 2 through 5) represent an average of the
bottom, mid—depth and surface concentrations for each sampling time. With one
exception, a complete lood p~ase of the tide was sampled on each day. Due to
operational difficulties, only a three—hour period was covered on Narch 19.
The bar graph (Pigore 6) indicates the average concentrations of all samples
collected at Station 26—A on each sampling day. Figures 7 and 8 depict the tidal
ranges and times for each sampling day. The period of sampling time is shown by ehc~
vertical dashed lines on each tidal chart.
As can be seen visuall2r fro the graphs, there is a definite correlation
between SIlL concentrations in Skookum Inlet and mill operations at Shelton. A
shut—down of mill operations results in a decrease in SJL concentrations; a start-
up brings bout an increase, There appears to be a definite time—lag invol-Ted: i .0.,
a noticeable reduction in SIlL concontrations in the Inlet does not occui~ immediately
after a shut—down. The available data is not complete and continuous enough to
accurately determine the lag period, but there appears to be up to a wok’s lapse
of time before a definite decreaseoccurs. Similarly, a lag occurs when the mill
restates operations; MEL concentrations continue to drop for several days following
a start—up.
By avenging all the results for each station on each day of stpling, the
following figures are obtained: (data for Station 264 is also shown graphically
in Figure 6).
DATE 264 26—B 26 26—C
*2—27 3S 3.7 3.7 3.8#3—Is 2.lz 1.9 1.8 1.8*3~l3 2.3 2.6 2.ls 2.33—19 2.2 2.1 1.8- ls-23—28 2.0 2.9 2.8 2.6b—12 2.6 2.6 2.li 2~2
2.6*Ij..29 2.1 16*5—10 1.7 1.85-2l~ 1.1 1.25—27 0.5 0.86—? 3.2 2.97—8 1.0*4*
* Mill not operating
** 8 days after the June 10—30 shut—down
Although variations appear in the data, the overall trend is definite; i.e.,
a reduction in MEL concentrations during periods of shut-down and a rise after
mill operations resume.
Conclusions
The data obtained fran the Skookim Inlet survey demonstratesa positive
3orrelation between the Rayonier operation at Shelton and the Intensity of
colortuetric reactions of samples obtained from Skookum Inlet.
To accurately determine the background colorimetric reaction of the waters of
southern Puget Sound, further data will be obtained during the current extended
inoperative period of the mill.
Page 3
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