25
Publication No. 57400 WA-14-0120 SKOOKtM INLET SURVEY Donald U. Peterson Richard A. Wagner Charles D. Ziebell Supervisor, Survey & Research Senior Biologist Biologist WASBDDTON POLLUTION CONIUCL CCN4ISSION February through August, 19%?

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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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