Alaska
:Jnited States	Region 10	Idaho
Tnvironnental Protection	1200 Sixih Avenue	Oregon
Ageic,>	Seattle WA 98101	Washington
Environmental Services Division	January, 1985
&EPA Lake Union
Sediment Investigation
Seattle, Washington
March 20-21, 1984

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-1-
^10- ^
INTRODUCTION
1/ Lake Union is an inland, freshwater lake located in the heart of the
City of Seattle. To the northwest, it is connected to Puget Sound via
the Fremont cut of the Lake Washington Ship Canal. To the northeast it
is joined to Portage Bay, whose waters mix with those of Union Bay and
Lake Washington through the Montiake cut.
The Montiake channel was completed in 1916 as part of a plan to promote
better flushing of Lake Washington and simultaneously provide a
navigable waterway between Lake Washington and the Sound. As part of
the plan, the Cedar River was diverted to the southern end of Lake
Washington, and the Hiram M. Chittenden Locks were constructed at the
mouth of Salmon Bey.
Today, this interconnected system of lakes and channels is a much
utilized passageway and recreational area. Numerous commercial and
pleasure craft ply its waters and are moored along its shores.
Particularly in Lake Union, marinas, houseboats, and commercial docks
abound; extensive morage and drydock facilities of the West Coast fleet
of the National Oceanic and Atmospheric Administration occupy its
southeastern shore.
The area immediately surrounding the lake is heavily industrialized. A
1943 report (Foster, 1943.2) published by the Washington State
Pollution Commission listed 45 industries on the shores of Lake Union
and the Lake Washington Ship Canal, in addition to the previously
mentioned marinal and boatyards (20 of which were listed as sources of
pollution). These included 10 machine shops and metal foundaries; 10
lumber and plywood mills; 12 fuel and oil storage and service
facitities; 8 companies dealing in sand, gravel, concrete or asphalt;
the Seattle City Light Power Plant on the southeastern shore; and the
Seattle Gas Plant on the northern shore. The last-mentioned
establishment was listed as one of the worst sources of lake water
pollution, routinely discharging oily wastes through inadequate filters
and occasionally spilling large quantities of oil so that the surface of
the water was covered and fish were killed in its vicinity. Today, it
is no longer in operation, having been turned over to the city in 1963
for conversion to a public park.
1/ Tomlinson, R.D., et al. 1977. A baseline study of the water quality,
sediment, and biota of Lake Union. METRO, Seattle
U Foster, Richard F. 1943. Sources of pollution in Lake Washington Canal
and Lake Union. Wash. State Poll. Comm., Poll. Series Bull. No. 28, 24
pp.
Property of U.S. Environmental
Protection Ac;ancv Library OivlP-l04
'm 26 -2016
1200 Sixth Avsnue, Seattle, WA 98101

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-2-
Concern over the past activities at Gas Works initiated a limited preliminary
field investigation of the surface soils. Results from this survey confirmed
high levels of polynuclear aromatic hydrocarbons. Due to the close
association of Gas Works and Lake Union the Lake Union sediment investigation
was therefore initiated. The obhective of this study was to sample the
surface sediments of Lake Union and to determine the level and extent of
contamination, if any.
STUDY SCOPE
The study covered the area within Lake Union with special emphasis given to
the bottom sediments just south of Gas Works Park. The survey area and
station locations are shown in Figures 1, 2 and 3. Twenty sediment samples
were collected along seven transects radiating out from Gas Works Park. Three
water and sediment samples were collected along the southeast shore of Gas
Works Park. Ten additional sediment samples were collected from other
locations of interest within Lake Union.
During the period of March 20 to 21, 1984, 33 sediments and 3 water samples
were collected from Lake Union. This study was conducted to obtain data on
the concentration and distribution of contaminants in the Lake Union bottom
sediments.
The results are presented in appendices of this report.
SAMPLING AND ANALYTICAL PROCEDURES
SAMPLING PROCEDURE
Two sediment samples were collected per station using a .1 meter Van Yeen grab
sampler. The sediment (approximately the top 10 cm.), not in direct contact
with the interior of the sampler was transferred to the sample containers with
stainless steel spatulas.
The grab sampler was thoroughly rinsed with Lake Union water between stations
and the spatulas were rinsed with deionized water between samples. The
samples were then sealed in pint glass containers with teflon lined lids. At
the end of the survey one set of samples was shipped to the EPA Lab located at
Manchester, Washington to be analyzed for metals, the second sample set was
shipped to Meed Compuchem for organic analyses.
SUMMARY OF ANALYTICAL METHODS
Procedures for metals. Samples of dry sediment were digested with a mixture
of nitric acid and hydrogen peroxide until the organic matter was destroyed.
The metals were determined by Atomic Absorption Spectrometry using a graphite
furnace or flame following EPA methods. Mercury was determined on a wet
sample by manual cold vapor technique, similar to that described by EPA METHOD
245.5.

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Figure 1
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-------
Figure 2
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Station Map

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Figure 3
Note: Distances in feet from shore are given for stations 2 through 21.
n Near shore stations, water and sediment samples collected.
Station Map

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-6-
Procedures for cyanides. Cyanides were distilled, and the distillate analyzed
by automated spectrophotometer following EPA METHODS.
Procedures for solids (percent). Samples were dried at 103-105 degrees C
according to EPA METHODS.
Procedures for organic compounds. Samples were analysed at an EPA contract
lab using approved EPA methods.
RESULTS
All of the sediment samples collected were analyzed for inorganic and organic
chemicals. The concentration of selected chemicals are reported in Appendices
A and B. Appendix A contains a complete listing of all results including the
minimum quantifiable limits for chemicals that were not detected. Appendix B
contains the same data as Appendix A with the exclusion of those below the
minimum quantifiable limits. All data are displayed on a dry weight basis.
Appendix C contains the depth, percent solids and a qualitative description of
the sediment found at each station.
PROPOSED ADDITIONAL STUDIES
There is considerable concern about the level of total polynuclear aromatic
hydrocarbons (PNA's) found in the sediments of Lake Union. Observed values of
PNA's, obtained during the March 20-21, 1984 field survey, were evaluated to
determine if they were adequate to characterize the extent of the problem.
The evaluation of these data, described in detail in Appendix F, focused on
two aspects of the monitoring program. The first was the value of the data
for determining the nature of the process leading to the present distribution
of total PNA's. The second was determining the uncertainty associated with
estimated levels.
The results of the evaluation show that the monitoring design used in the
original study was reasonably good in terms of identifying the underlying
process. The design would, however, be improved by extending the spatial
coverage to the south and west, as shown in Figure F-11. For the measurements
obtained during the March 1984 field study, the uncertainty of estimated
values within the sampled area was found to be fairly high. The estimated
standard deviation of the log-transformed data was on the order of one. This
means that one standard deviation of the actual (untransformed) estimates is
about one order of magnitude. That is, an upper bound of an estimate would be
ten times the estimated value, while a lower bound would be one-tenth of the
estimate. The uncertainty of the average value at a point, for the type of
error found in the data, can be reduced by taking replicates at each station.
In the log-transformed space, the reduction in the standard deviation is
proportional to 1/ n , where n is the number of replicates.
In summary, an adequate monitoring program for identifying the underlying
process would include the spatial coverage shown in Figure F-11. Reduction of

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-7-
uncertainty of the estimated average value at any point would require the
collection of replicate samples.
To determine the depth of contaiminated sediments Acoustic sub-bottom
profiling of the Lalce Union bottom sediments is recommended. Using a 3.5 kHz
acoustic profiler sub-bottom tracklines would be run the length of Lake
Union. Data from the tracklines would be used to construct contour maps that
would show sediment thickness, density changes and areas of high
accumulation. A radar raging system would be used for navigational control.
Navigational accuracy would be +- 2 meters. Deep cores should be collected at
several locations to establish ground truth for the sub-bottom contours.

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APPENDIX A
COMPLETE LISTING OF CHEMICAL CONCENTRATIONS ON A DRY WEIGHT BASIS
INCLUDING THE MINIMUM QUANTIFIABLE LIMITS

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INORGANICS — METALS
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON
STA WELL ITR		
STATION DESCRIPTION NUM DEPTH M NUM DATE TIME AL*
#01
S
12151
840320
0808
102
S
12152
840320
0830
#03
S
12153
840320
0845
#04
S
12154
840320
0900
#05
S
12155
840320
0913
#06
S
12156
840320
0925
#07
S
12157
840320
0938
#08
S
12158
840320
0955
#09
S
12159
840320
1030
#10
S
12160
840320
1045
#1 1
S
12161
840320
1120
#12
S
12162
840320
1135
#13
S
12163
840320
1325
#14
S
12164
840320
1340
#15
S
12165
840320
1345
#16
S
12166
840320
1355
#17
S
12167
840320
1410
#18
S
12168
840320
1420
#19
S
12169
840320
1430
#20
S
12170
840320
1445
#21
s
12171
840320
1455
#22
s
12172
840320
1515
#23
s
12173
840320
1525
#24
s
12174
840320
1530
#25
s
12175
840320
1545
#26
s
12176
840320
1555
#27
s
12177
840320
1600
#28
s
12178
840320
1612
#29
s
12179
840320
1620
#30
s
12180
840320
1630
#31 OFF LEFT BUSH
s
12181
840321
0810
#31 OFF LEFT BUSH
w
12182
840321
0810
#32 NEAR CONCRETE BLOCK
s
12183
840321
0820
#32 NEAR CONCRETE BLOCK
w
12184
840321
0820
#33 MIDWAY BLOCK & PIER
s
12185
840321
0840
#33 MIDWAY BLOCK & PIER
w
12186
840321
0840
TRANSPORT BLANK

12187
840321

U NOT DETECTED
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
ANALYSES: EPA LAB — MANCHESTER
UNITS: SEDIMENT MG/KG (PPM) DRY WEIGHT BASIS
WATER MG/L (PPM)
	METALS PARAMETERS	
CR	BA* BE	CO* CU	FE* Nl
155.5 I
1 .45 I
1 168 I
1 62.7 1
155.1 1
1 .39 I
1 192 1
1 291 1
152.3 1
1 .35 1
1 205 I
1 71.0 I
161.5 I
1 .48 I
1 162 I
1 73.3 1
132.9 1
1 .33 I
1 134 I
1 265 I
157.0 I
1 .45 I
1 174 1
1 97.6 1
154.1 I
1 .33 1
1 169 I
1 56.4 I
135.9 1
1 .31 1
1 79 I
1 223 1
148.5 1
1 .34 I
1 158 1
1 94.5 I
153.8 1
1 .40 1
1 163 I
1 64.0 1
132.4 1
1 .26 I
1 72 I
1 202 I
147.6 I
1 .35 1
1 152 I
1 125 I
122.1 I
1 .20 I
1 24 I
1 47.1 I
147.6 I
1 .41 1
1 138 1
1 130 1
161.6 1
1 .42 1
1 250 I
1 72.8 I
126.0 I
1 .21 I
1 104 I
1 88.0 1
136.3 1
1 .34 I
1 120 I
1 162 I
156.7 1
1 .46 1
1 171 1
1 132 I
147.4 1
1 .31 1
1 186 I
1 91.6 I
162.6 I
1 .48 I
1 181 I
1 85.8 1
145.2 1
1 .37 I
1 175 1
1 141 1
159.2 1
1 .50 1
1 301 I
1 70.8 1
164.8 I
1 .50 I
1 230 I
II10 I
183.7 1
1 .51 I
1 375 1
1 94.5 1
186.6 1
1 .50 1
1 484 I
I 92.0 I
174.4 1
1 .44 1
1 587 1
1 69.1 1
175.1 1
1 .80 I
1 124 1
1 93.2 I
165.5 1
1 .62 I
1 184 I
1 78.6 1
167.6 I
1 .56 I
1 242 |
1 71.4 I
170.3 I
1 .55 1
1 121 1
1 84.8 1
117.4 1
1 .22 I
1 23 I
1 98.9 I
1 .001 I
1 .0002 Ul
1 .0581
1 .0621
113.9 1
1.15 I
1 88 I
1 89.7 1
113 1
1 .2 Ul
1 200 I
1 220 1
118.1 1
1 .25 I
1 32 |
1 206 1
1 .013 1
1 .0002 Ul
1 .0781
1 .6131
1 .OOOIUI
1 .0002 Ul
1 .0371
1 .0121

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INORGANICS — METALS
U
M
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON
STA WELL ITR
STATION DESCRIPTION NUM
DEPTH M
NUM
DATE
TIME
#01
S
12151
840320
0808
#02
S
12152
840320
0830
#03
S
12153
840320
0845
#04
S
12154
840320
0900
#05
s
12155
840320
0913
#06
s
12156
840320
0925
#07
s
12157
840320
0938
#08
s
12158
840320
0955
#09
s
12159
840320
1030
#10
s
12160
840320
1045
#11
s
12161
840320
1120
#12
s
12162
840320
1135
#13
s
12163
840320
1325
#14
s
12164
840320
1340
#15
s
12165
840320
1345
#16
s
12166
840320
1355
#17
s
12167
840320
1410
#18
s
12168
840320
1420
#19
s
12169
840320
1430
#20
s
12170
840320
1445
#21
s
121 71
840320
1455
#22
s
12172
840320
1515
#23
s
12173
840320
1525
#24
s
12174
840320
1530
#25
s
12175
840320
1545
#26
s
12176
840320
1555
#27
s
12177
840320
1600
#28
s
12178
840320
1612
#29
s
12179
840320
1620
#30
s
12180
840320
1630
#31 OFF LEFT BUSH
s
12181
840321
0810
#31 OFF LEFT BUSH
w
12182
840321
0810
#32 NEAR CONCRETE BLOCK
s
12183
840321
0820
#32 NEAR CONCRETE BLOCK
w
12184
840321
0820
#33 MIDWAY BLOCK & PIER
s
12185
840321
0840
#33 MIDWAY BLOCK & PIER
w
12186
840321
0840
TRANSPORT BLANK

12187
840321

NOT DETECTED
COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
ANALYSES: EPA LAB — MANCHESTER
UNITS: SEDIMENT MG/KG (PPM) DRY WEIGHT BASIS
WATER MG/L (PPM)
METALS PARAMETERS
ZN
B*
V* AG

AS
SB

SE

456 1

12.45

34.5
.9
1
.4

431 1

10.27

284
.3
1
.2

482 1

11.21

53.5
.5
1
.2

450 1

10.60

27.6
.3
1
.3

293 1

10.18

39.0
.1
1
.2

427 1

1 1.82

36.5
.4
1
.5

416 1

13.02

55.5
.4
1
.5

210 1

10.33

12.8
.1
1
.2
U
352 I

11.15

26.9
.4
1
.3

420 1

10.31

33.1
.3
1
.4

153 1

10.47

21.7
.2
1
.2
U
336 1

12.45

35.0
.2
1
.2

70 1

10.06

3.6
.1
Ul
.2
u
327 1

12.49

27.5
.3
1
.3

485 I

13.77

31.9
.1
Ul
.5

175 1

10.61

11.7
.3
1
.2
u
250 I

1 1.59

22.1
.3
1
.2

382 I

12.68

26.2
.1
Ul
.2
u
350 1

12.64

31.0
.5
1
.2

454 I

13.99

28.7
.1
Ul
.7

285 I

1 1.04

18.3
.7
1
.6

648 1

12.23

85.0
.1
1
.2

476 1

1 1.53

23.0
. 1
1
.6

708 1

10.54

42.5
.1
Ul
.8

740 1

1 1.95

33.0
.1
Ul
.2

1058 1

13.18

168
6.4
1
.5

177 1

11.02

10.4
.2
1
.6

512 1

16.91

20.2
.3
1
.2
u
668 I

15.65

28.0
.2
1
.4

276 1

14.47

12.6
.1
1
.4

71 1

1 .02
U
5.7
4.9
1
.2
u
.0471

1 .0002
U
.OOIU
.001
1


51 1

1 .02
U
13.2
25.0
1
.2
u
100 1

1 .2
U
25
7
1
1
u
75 I

1 .02
U
6.7
.1
1
.2
u
.0711

1 .0002
U
.048
.001
1


.0011

1 .0002
u
.OOIU
.OOOIUI



-------
INORGANICS ~ METALS
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON
STA WELL ITR
STAT 1 ON DESCR1PT1ON NUM
DEPTH M NUM
DATE
TIME
#01
S
121 51
840320
0808
#02
S
12152
840320
0830
#03
S
12153
840320
0845
#04
S
12154
840320
0900
#05
S
12155
840320
0913
#06
S
12156
840320 0925
#07
S
12157
840320
0938
#08
S
12158
840320
0955
#09
S
12159
840320
1030
#10
S
12160
840320
1045
#11
S
12161
840320
1120
#12
S
12162
840320
1135
#13
S
12163
840320
1325
#14
S
12164
840320
1340
#15
S
12165
840320
1345
#16
S
12166
840320
1355
#17
S
12167
840320
1410
#18
S
12168
840320
1420
#19
S
12169
840320
1430
#20
S
12170
840320
1445
#21
s
121 71
840320
1455
#22
s
12172
840320
1515
#23
s
12173
840320
1525
#24
s
12174
840320
1530
#25
s
12175
840320
1545
#26
s
12176
840320
1555
#27
s
12177
840320
1600
#28
s
12178
840320
1612
#29
s
12179
840320
1620
#30
s
12180
840320
1630
#31 OFF LEFT BUSH
s
12181
840321
0810
#31 OFF LEFT BUSH
w
12182
840321
0810
#32 NEAR CONCRETE BLOCK
s
12183
840321
0820
#32 NEAR CONCRETE BLOCK
w
12184
840321
0820
#33 MIDWAY BLOCK & PIER
s
12185
840321
0840
#33 MIDWAY BLOCK & PIER
w
12186
840321
0840
TRANSPORT BLANK

12187
840321

U NOT DETECTED
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
ANALYSES: EPA LAB — MANCHESTER


UNITS:
SEDIMENT
MG/KG (PPM)
DRY WEIGHT BA



WATER

MG/L (PPM)

— M
E T
A L S PAR
A M E T
E
R S	

TL

HG SN*
CD

PB PHENOLIC CN
1
Ul
1.1361
12.1

397 1
1 .78 Ul
1
Ul
2.6261
1 1.5

416 1
11680 1
1
1
1.4831
12.2

541 I
1168 1
1
i
1.4181
12.1

324 1
1 5.8 1
1
Ul
I.I 141
11.4

296 1
II190 1
1
1
1.3561
12.0

288 I
1 96.6 1
1
Ul
1.3981
12.3

512 I
1 17.7 1
1
Ul
.5871
1 1.0

158 1
1 6.5 1

1
.9831
11.7

471 I
1 21.7 1
1
1
1.3251
12.4

377 1
1 .78 Ml
1
1
.4941
10.2

101 1
1 3.8 1
2
1
.7801
12.1

319 1
1 16.5 1
1
Ul
.0511
10.3

28 I
1 .24 1
1
Ul
.7981
1 1.9

263 1
1 1.4 1
1
1
1.255 1
12.0

466 1
1 .83 Ml
2
1
.3111
10.8

284 1
1 8.0 1
1
Ul
.5701
11.0

199 I
1 5.3 1
3
1
1.1 771
10.3

277 1
1 4.6 1
1
Ul
.7751
11.5

403 I
1 7.3 1
1
Ul
1.0601
12.3

31 1 1
1 4.1 1
1
Ul
1.3891
10.4

185 I
1 1.4 1
2
1
1.0321
11.8

508 1
1 3.9 1
1
Ul
1.1621
10.6

304 I
11.5 1
1
Ul
3.1731
12.2

455 I
1 1.2 I
1
Ul
4.2931
10.5

441 I
1 .72 1
1
1
2.6191
10.2

720 I
1 1.2 1

1
.4581
10.1

60 I
1 .43 1
1
1
1.5551
12.0

381 1
1 I.I 1
1
Ul
2.3161
12.3

572 I
1 1.9 1

1
1.2271
11.2

262 I
1 .93 1
1
Ul
.0341
1 .2

126 I
1 15 1
001
Ul
1
1 .0002

.0781
1 .43 1
1
Ul
.7571
1 .1

962 I
1215 1

Ul
1.48 1
1 .2
U
1225 1
1 7.2 1
1
Ul
.0591
1 .3

37 I
1 5.0 1
001
Ul
1
1 .0002

.0781
1 .05 1
001
Ul
1
1 .0002
U
.0191
1 .005UI

-------
ORGANIC ANALYSES
LAKE UNION SEDIMENT SUKVEY
SEATTLE, WASHINGTON
U NOT DETECTED -- VALUE SHOWN IS THE MINIMUM QUANTIFIABLE LIMIT
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
ANALYSES: MEED COMPUCHEM
UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
ACID COMPOUNDS
STATION DESCRIPTION
STA
NUM
WELL
DEPTH
OTR
M NUM
DATE
TIME
2,4,6
TRI
CHLORO
PHENOL

p-
CHLORO
-M-
CRESOL

2-
CHLORO
PHENOL
2,4,DI
CHLORO
PHENOL

2,4,DI
METHYL
PHENOL

2-
NITRO
PHENOL

4-
NITRO
PHENOL

2»4,D1
NITRO
PHENOL
#01


S
J3I0I
840320
0808
3100
U
6200
U
3100
U
3100
U
3100
U
6200
U
31000
u
15500 Ul
#02


S
J3I02
840320
0830
21000
U
42000
U
21000
u
21000
u
21000
u
42000
u
210000
u
105000 Ul
#03


S
J3I03
840320
0845
6700
U
13400
u
6700
u
6700
u
6700
u
13400
u
67000
U
33500 Ul
#04


S
J3I04
840320
0900
5000
U
10000
u
5000
u
5000
u
5000
u
10000
u
50000
U
25000 Ul
#05


S
J3I05
840320
0913
2500
U
5000
u
2500
u
2500
u
2500
u
5000
u
25000
U
12500 Ul
#06


S
J3I06
840320
0925
5000
U
10000
u
5000
u
5000
u
5000
u
10000
u
50000
U
25000 Ul
#07


S
J3I07
840320
0938
5300
U
10600
u
5300
u
5300
u
5300
u
10600
u
53000
U
26500 Ul
*08


S
J3I08
840320
0955
2200
U
4400
u
2200
u
2200
u
2200
u
4400
u
22000
U
11000 Ul
#09


S
J3I09
840320
1030
4560
U
9120
u
4560
u
4560
u
4560
u
9120
u
45600
U
22800 Ul
#10


S
J3110
840320
1045
5200
U
10400
u
5200
u
5200
u
5200
u
10400
u
52000
U
26000 Ul
#11


s
J3III
840320
1120
70000
u
140000
u
70000
u
70000
u
70000
u
140000
u
700000
U
350000 Ul
#12


s
J3II2
840320
1135
4720
u
9440
u
4720
u
4720
u
4720
u
9440
u
47200
U
23600 Ul
#13


s
J3I 13
840320
1325
1000
u
2000
u
1000
u
1000
u
1000
u
2000
u
10000
U
5000 Ul
#14


s
J3I 14
840320
1340
23000
u
46000
u
23000
u
23000
u
23000
u
46000
u
230000
U
115000 Ul
#15


s
J3115
840320
1345
2200
u
4400
u
2200
u
2200
u
2200
u
4400
u
22000
U
11000 Ul
#16


s
J3II6
840320
1355
37000
u
74000
u
37000
u
37000
u
37000
u
74000
u
370000
U
185000 Ul
#17


s
J3117
840320
1410
43000
u
86000
u
43000
u
43000
u
43000
u
86000
u
430000
u
215000 Ul
#18


s
J3I 18
840320
1420
2200
u
4400
u
2200
u
2200
u
2200
u
4400
u
22000
u
11000 Ul
#IS


s
J3119
840320
1430
3730
u
7460
u
3730
u
3730
u
3730
u
7460
u
37300
u
18650 Ul
#20


s
J3I20
840320
1445
5600
u
11200
u
5600
u
5600
u
5600
u
11200
u
56000
u
28000 Ul
#21


s
J3I2I
840320
1455
50000
u
100000
u
50000
u
50000
u
50000
u
100000
u
500000
u
250000 Ul
#22


s
J3I22
840320
1515
6000
u
12000
u
6000
u
6000
u
6000
u
12000
u
60000
u
30000 Ul
#23


s
J3I23
840320
1525
5100
u
10200
u
5100
u
5100
u
5100
u
10200
u
51000
u
25500 Ul
#24


s
J3I24
840320
1530
5100
u
10200
u
5100
u
5100
u
5100
u
10200
u
51000
u
25500 Ul
#25


s
J3I25
840320
1545
5500
u
11000
u
5500
u
5500
u
5500
u
11000
u
55000
u
27500 Ul
#26


s
J3I26
840320
1555
3100
u
6200
u
3100
u
3100
u
3100
u
6200
u
31000
u
15500 Ul
#27


s
J3I27
840320
1600
900
u
1800
u
900
u
900
u
900
u
1800
u
9000
u
4500 Ul
#28


s
J3I28
840320
1612
1480
u
2960
u
1480
u
1480
u
1480
u
2960
u
14800
u
7400 Ul
#29


s
J3I29
840320
1620
2300
u
4600
u
2300
u
2300
u
2300
u
4600
u
23000
u
16500 Ul
#30


s
J3I30
840320
1630
1300
u
2600
u
1300
u
1300
u
1300
u
2600
u
13000
u
6500 Ul
#31 OFF LEFT BUSH


s
12181
840321
0810
100
u
10
u
20
u
50
u
50
u
50
u
300
u
300 Ul
#31 OFF LEFT BUSH


w
12182
840321
0810
1
u
#
IU

2U

5U
#
5U
.
5U
3
u
3 Ul
#32 NEAR CONCRETE BLOCK


s
12183
840321
0820
1000
u
100
u
200
u
500*
u
500
u
500
u
3000
u
3000 Ul
#32 NEAR CONCRETE BLOCK


w
12184
840321
0820
3
u
.
3U

6U
2
u
2
u
2
u
6
u
6 Ul
#33 MIDWAY BLOCK 4 PIER


s
12185
840321
0840
500
u
50
u
100
u
250
u
250
u
250
u
1500
u
1500 Ul
#53 MIDWAY BLOCK 4 PIER


w
12186
840321
0840
20
u
2
u
4
u
10
u
10
u
10
u
60
u
60 Ul
TRANSPORT BLANK


s
J3I34
840321

400
u
800
u
400
u
400
u
400
u
800
u
4000
u
2000 Ul
TRANSPORT BLANK



12187
840321

. 3U

IU

IU
.
2U

2U

2U
1
u
1 Ul

-------
ORGANIC ANALYSES
NOT DETECTED — VALUE SHOWN IS THE MINIMUM QUANTIFIABLE LIMIT
COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
ANALYSES: MEED COMPUCHEM
UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
	ACID COMPOUNDS	
4.6.DI PENTA
STA WELL OTR	NITRO 0 CHLORO
STATION DESCRIPTION
NUM DEPTH M NUM
DATE
TIME
CRESOL

PHENOL

PHENOL
101
S
J3I0I
840320
0808
6200
U
6200
U
3100
Ul
#02
S
J3I02
840320
0830
42000
U
42000
u
21000
Ul
#03
S
J3I03
840320
0845
13400
u
34000
u
6700
Ul
#04
S
J3I04
840320
0900
10000
u
10000
u
5000
Ul
#05
S
J3I05
840320
0913
5000
u
5000
u
20922
1
#06
S
J3I06
840320
0925
10000
u
10000
u
5000
Ul
#07
S
J3I07
840320
093U
10600
u
375560

5300
Ul
#08
S
J3I08
840320
0955
4400
u
4400
u
2200
Ul
#09
S
J3I09
840320
1030
9120
u
9120
u
4560
Ul
#10
S
J3II0
840320
1045
10400
u
10400
u
5200
Ul
#1 1
S
J3111
840320
1120
140000
u
140000
u
70000
Ul
#12
S
J3I 12
840320
1135
9440
u
9440
u
4720
Ul
#13
S
J3II3
840320
1325
2000
u
2000
u
1000
Ul
#14
S
J3I 14
840320
1340
46000
u
46000
u
23000
Ul
#15
S
J3115
840320
1345
4400
u
4400
u
2200
Ul
#16
s
J3II6
840320
1355
74000
u
74000
u
37000
Ul
#17
s
J3II7
840320
1410
86000
u
86000
u
43000
Ul
#18
s
J3118
840320
1420
4400
u
4400
u
2200
Ul
#19
s
J3119
840320
1430
7460
u
7460
u
3730
Ul
#20
s
J3I20
840320
1445
11200
u
11200
u
5600
Ul
#21
s
J3I2I
840320
1455
100000
u
100000
u
50000
Ul
#22
s
J3I22
840320
1515
12000
u
12000
u
6000
Ul
#23
s
J3I23
840320
1525
10200
u
10200
u
5100
Ul
#24
s
J3I24
840320
1530
10200
u
10200
u
5100
Ul
#25
s
J3I25
840320
1545
11000
u
II000
u
5500
Ul
#26
s
J3I26
840320
1555
6200
u
6200
u
3100
Ul
#27
s
J3I27
840320
1600
1800
u
1800
u
900
Ul
#28
s
J3I28
840320
1612
2960
u
2960
u
1480
Ul
#29
s
J3I29
840320
1620
4600
u
4600
u
2300
Ul
#30
s
J3I30
840320
1630
2600
u
2600
u
1300
Ul
#31 OFF LEFT BUSH
s
12181
840321
0810
500
u
30
u
20
Ul
#31 OFF LEFT BUSH
w
12182
840321
0810
5
u
#
3U

2UI
#32 NEAR CONCRETE BLOCK
s
12183
840321
0820
5000
u
300
U
200
Ul
#32 NEAR CONCRETE BLOCK
w
12184
840321
0820
20
u

9U

6U1
#33 MIDWAY BLOCK 4 PIER
s
12185
840321
0840
2500
u
150*
u
100
Ul
#33 MIDWAY BLOCK & PIER
w
12186
840321
0840
100
u
6
u
4
Ul
TRANSPORT BLANK
s
J3I34
840321

800
u
800
u
400
Ul
TRANSPORT BLANK

12187
840321

2
u
.
IU
.
IUI
U
M
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON

-------
ORGANIC ANALYSES
NOT DETECTED — VALUE SHOWN IS THE MINIMUM QUANTIFIABLE LIMIT
COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
ANALYSES: MEED COMPUCHEM
UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
	PESTICIDES	

STA WELL
OTR






CHLOR-

4,4'-

4,4'-

4,4'-
A-ENDO

B-ENDO

STATION DESCRIPTION
NUM DEPTH M
NUM
DATE
TIME
ALDRIN

DIELDRIN
DANE

DDT

DDE

DDD
SULFAN

SULFAN

101
S
J3I0I
840320
0808
30.8
U
30.8
U
30.8
u
30.8
u
30.8
u
30.8
u
30.8
u
30.8
Ul
#02
S
J3I02
840320 0830
624
U
624
U
624
u
624
u
624
U
624
U
624
u
624
Ul
#03
S
J3I03
840320 0845
336
U
336
U
336
U
336
U
336
U
336
U
336
U
336
Ul
#04
S
J3I04
840320 0900
40
U
40
U
40
U
40
u
40
U
143
M
40
U
40
Ul
#05
S
J3I05
840320 0913
488
U
488
U
488
U
488
u
488
U
488
U
488
U
488
Ul
#06
S
J3I06
840320 0925
504
U
504
U
504
U
504
u
504
U
504
U
504
U
504
Ul
#07
S
J3I07
840320
0938
36.64
U
36.64
U
36.64
U
36.64
u
36.64
U
36.64
U
36.64
U
36.64
Ul
#06
S
J3I08
840320 0955
18
U
18
U
18
U
18
u
18
U
18
U
18
U
18
Ul
#09
S
J3I09
840320
1030
456
U
456
u
456
U
456
u
456
U
456
U
456
U
456
Ul
#10
S
J3II0
840320
1045
116
U
116
u
116
U
116
u
116
U
116
U
116
U
116
Ul
#11
S
J3III
840320
1120
348
U
348
u
348
U
348
u
348
U
348
U
348
U
348
Ul
#12
S
J3I 12
840320
1135
236
u
236
u
236
U
236
u
236
U
236
U
236
U
236
Ul
#13
S
J3113
840320
1325
100
u
100
u
100
U
100
u
100
U
100
U
100
U
100
Ul
#14
S
J3114
840320
1340
180
u
180
u
180
U
180
u
180
U
853
M
180
U
180
Ul
#15
S
J3II5
840320
1345
176
u
176
u
176
U
176
u
176
U
176
U
176
U
176
Ul
#16
S
J3116
840320
1355
40
u
40
u
40
U
40
u
40
U
40
U
40
U
40
Ul
#17
S
J3117
840320
1410
216
u
216
u
216
U
216
u
216
U
216
U
216
U
216
Ul
#18
S
J3II8
840320
1420
21.5
u
21.5
u
21.5
u
21.5
u
21.5
U
21.5
U
21.5
U
21.5
Ul
#19
s
J3119
840320
1430
388
u
388
u
388
u
388
u
388
u
388
U
388
U
388
Ul
#20
s
J3I20
840320
1445
488
u
488
u
488
u
488
u
488
u
488
U
488
u
488
Ul
#21
s
J3I2I
840320
1455
26.4
u
26.4
u
26.4
u
26.4
u
26.4
U
26.4
U
26.4
u
26.4
Ul
#22
s
J3I22
840320
1515
31
u
31
u
31
u
31
u
31
U
31
U
31
u
31
Ul
#23
s
J3I23
840320
1525
25.6
u
25.6
u
25.6
u
25.6
u
25.6
u
25.6
U
25.6
u
25.6
Ul
#24
s
J3I24
840320
1530
25
u
25
u
25
u
25
u
25
u
25
U
25
u
25
Ul
#25
s
J3I25
840320
1545
25.3
u
25.3
u
25.3
u
25.3
u
25.3
u
25.3
U
25.3
u
25.3
Ul
#26
s
J3I26
840320
1555
30.8
u
30.8
u
30.8
u
30.8
u
30.8
u
30.8
u
30.8
u
30.8
Ul
#27
s
J3I27
840320
1600
10.6
u
10.6
u
10.6
u
10.6
u
10.6
u
10.6
u
10.6
u
10.6
Ul
#28
s
J3I28
840320
1612
14.8
u
14.8
u
777

14.8
u
14.8
u
14.8
u
14.8
u
14.8
Ul
#29
s
J3I29
840320
1620
23.3
u
23.3
u
23.3
u
23.3
u
23.3
u
23.3
u
23.3
u
23.3
Ul
#30
s
J3I30
840320
1630
13.4
u
13.4
u
13.4
u
13.4
u
13.4
u
13.4
u
13.4
u
13.4
Ul
#31 OFF LEFT BUSH
s
12181
840321
0810
20
u
20
u
20
u
20
u
20
u
20
u
20
u
20
Ul
#31 OFF LEFT BUSH
W
12182
840321
0810
1
u
1
u
1
u
1
u
1
u
1
u
1
u
1
Ul
#32 NEAR CONCRETE BLOCK
s
12183
840321
0820
10
u
10
u
10
u
10
u
10
u
10
u
10
u
10
Ul
#32 NEAR CONCRETE BLOCK
w
12184
840321
0820
10
u
10
u
10
u
10
u
10
u
10
u
10
u
10
Ul
#33 MIDWAY BLOCK & PIER
s
12185
840321
0840
20
u
20
u
20
u
20
u
20
u
20
u
20
u
20
Ul
#33 MIDWAY BLOCK & PIER
w
12186
840321
0840
10
u
10
u
10
u
10
u
10
u
10
u
10
u
10
Ul
TRANSPORT BLANK
s
J3I34
840321

4.0
u
4.0
u
4.0
u
4.0
u
4.0
u
4.0
u
4.0
u
4.0
Ul
TRANSPORT BLANK

12187
840321

1
u
1
u
1
u
1
u
1
u
1
u
1
u
1
Ul
U
M
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON

-------
ORGANIC ANALYSES
U NOT DETECTED — VALUE SHOWN IS THE MINIMUM QUANTIFIABLE LIMIT
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
LAKE UNION SEDIMENT SURVEY	ANALYSES: MEED COMPUCHEM
SEATTLE, WASHINGTON	UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
	PESTICIDES	
ENDO	HEPTA

STA
WELL
OTR


SULFAN



ENDRIN

HEPTA

CHLOR







G-BHC

STATION DESCRIPTION
NUM
DEPTH M
NUM
DATE
TIME
SULFATE
ENDRIN

ALDEHYDE
CHLOR

EPOXIDE
A-BHC
B-BHC

D-BHC

LINDANE
#01

S
J3I0I
840320
0808
30.8
U
30.8
U
30.8
U
30.8
U
30.8
U
30.8
U
30.8
U
30.8
U
30.8
Ul
#'02

S
J3I02
840320
0830
624
u
624
U
624
U
624
U
624
U
624
U
624
U
624
U
624
Ul
#03

S
J3I03
840320
0845
336
u
336
U
336
U
336
U
336
U
336
U
336
U
336
U
336
Ul
#04

S
J3I04
840320
0900
40
u
40
U
40
U
40
U
40
U
40
U
40
U
40
U
40
Ul
#05

S
J3I05
840320
0913
488
u
488
U
488
U
488
U
488
U
488
U
488
U
488
U
488
Ul
#06

S
J3I06
840320 0925
504
u
504
U
504
U
504
U
504
U
504
U
504
U
504
U
504
Ul
#07

S
J3I07
840320
0938
36.64
u
36.64
U
36.64
U
36.64
U
36.64
U
36.64 U
36.64
U
36.64
U
36.64
Ul
#08

S
J3I08
840320 0955
18
u
18
U
18
U
18
U
18
U
18
u
18
U
18
U
18
Ul
#09

S
J3I09
840320
1030
456
u
456
U
456
U
456
U
456
U
456
u
456
U
456
U
456
Ul
#10

S
J3II0
840320
1045
116
u
116
U
116
U
1 16
U
116
U
116
u
116
U
116
U
116
Ul
#1 1

S
J311 1
840320
1120
348
u
348
U
348
U
348
U
348
U
348
u
348
U
348
U
348
Ul
#12

S
J3112
840320
1135
236
u
236
U
236
U
236
U
236
U
236
u
236
U
236
U
236
Ul
#13

S
J3II3
840320
1325
100
u
100
U
100
U
100
u
100
U
100
u
100
U
100
U
100
Ul
#14

S
J3I 14
840320
1340
180
u
180
U
180
U
180
u
180
U
180
u
180
U
180
U
180
Ul
#15

S
J3115
840320
1345
176
u
176
u
176
U
176
u
176
U
176
u
176
U
176
U
176
Ul
#16

S
J3116
840320
1355
40
u
40
u
40
U
40
u
40
U
40
u
40
U
40
U
40
Ul
#17

S
J3117
840320
1410
216
u
216
u
216
U
216
u
216
U
216
u
216
U
216
U
216
Ul
#18

S
J3118
840320
1420
21.5
u
21.5
u
21.5
U
21.5
u
21.5
U
21.5
u
21.5
u
21.5
U
21.5
Ul
#19

S
J3119
840320
1430
388
u
388
u
388
U
388
u
388
U
388
u
388
u
388
U
388
Ul
#20

S
J3I20
840320
1445
488
u
488
u
488
U
488
u
488
U
488
u
488
u
488
u
488
Ul
#21

S
J3I2I
840320
1455
26.4
u
26.4
u
26.4
U
26.4
u
26.4
u
26.4
u
26.4
u
26.4
u
26.4
Ul
#22

S
J3I22
840320
1515
31
u
31
u
31
u
31
u
31
u
31
u
31
u
31
u
31
Ul
#23

S
J3I23
840320
1525
25.6
u
25.6
u
25.6
u
25.6
u
25.6
u
25.6
u
25.6
u
25.6
u
25.6
Ul
#24

s
J3I24
840320
1530
25
u
25
u
25
u
25
u
25
u
25
u
25
u
25
u
25
Ul
#25

s
J3I25
840320
1545
25.3
u
25.3
u
25.3
u
25.3
u
25.3
u
25.3
u
25.3
u
25.3
u
25.3
Ul
#26

s
J3I26
840320
1555
30.8
u
30.8
u
30.8
u
30.8
u
30.8
u
30.8
u
30.8
u
30.8
u
30.8
Ul
#27

s
J3I27
840320
1600
10.6
u
10.6
u
10.6
u
10.6
u
10.6
u
10.6
u
10.6
u
10.6
u
10.6
Ul
#28

s
J3I28
840320
1612
14.8
u
14.8
u
14.8
u
14.8
u
14.8
u
14.8
u
14.8
u
14.8
u
14.8
Ul
#29

s
J3I29
840320
1620
23.3
u
23.3
u
23.3
u
23.3
u
23.3
u
23.3
u
23.3
u
23.3
u
23.3
Ul
#30

s
J3I30
840320
1630
13.4
u
13.4
u
13.4
u
13.4
u
13.4
u
13.4
u
13.4
u
13.4
u
13.4
Ul
#31 OFF LEFT BUSH

s
12181
840321
0810
20
u
20
u
20
u
20
u
20
u
20
u
20
u
20
u
20
Ul
#31 OFF LEFT BUSH

w
12182
840321
0810
1
u
1
u
1
u
1
u
1
u
1
u
1
u
1
u
1
Ul
#32 NEAR CONCRETE BLOCK

s
12183
840321
0820
10
u
10
u
10
u
10
u
10
u
10
u
10
u
10
u
10
Ul
#32 NEAR CONCRETE BLOCK

w
12184
840321
0820
10
u
10
u
10
u
10
u
10
u
10
u
10
u
10
u
10
Ul
#33 MIDWAY BLOCK & PIER

s
12185
840321
0840
20
u
20
u
20
u
20
u
20
u
20
u
20
u
20
u
20
Ul
#33 MIDWAY BLOCK & PIER

w
12186
840321
0840
10
u
10
u
10
u
10
u
10
u
10
u
10
u
10
u
10
Ul
TRANSPORT BLANK

s
J3I34
840321

4.0
u
4.0
u
4.0
u
4.0
u
4.0
u
4.0
u
4.0
u
4.0
u
4.0
Ul
TRANSPORT BLANK


12187
840321

1
u
1
u
1
u
1
u
1
u
1
u
1
u
1
u
1
Ul

-------
ORGANIC ANALYSES
U NOT DETECTED — VALUE SHOWN IS THE MINIMUM QUANTIFIABLE LIMIT
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
LAKE UNION SEDIMENT SURVEY	ANALYSES: MEED COMPUCHEM
SEATTLE, WASHINGTON	UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
STA WELL OTR		PCB	TOXA- TCDD
STATION DESCRIPTION NUM DEPTH M NUM DATE TIME PCB-1242 PCB-1254 PCB-1221 PCB-1232 PCB-1248 PCB-1260 PCB-I0I6 PHENE DIOXIN
<(01
S
J3I0I
840320
0808
30.8
U
4466

30.8
U
30.8
U
30.8
U
30.8
U
30.8
U
30.8
Ul
#02
S
J3I02
840320 0830
624
U
624
U
624
U
624
U
624
U
624
U
624
u
624
Ul
#03
S
J3I03
840320
0845
336
U
336
U
336
U
336
U
336
U
336
U
336
u
336
Ul
#04
S
J3I04
840320
0900
40
U
40
U
40
U
40
U
40
u
40
U
40
u
40
Ul
#05
S
J3I05
840320
0913
488
U
468
U
488
U
488
U
488
u
488
U
488
U
488
Ul
#06
S
J3I06
840320
0925
504
U
504
U
504
U
504
U
504
u
504
U
504
U
504
Ul
#07
S
J3I07
840320
0938
36.64
U
36.64U
36.64
u
36.64
u
36.64
u
36.64U
36.64
U
36.64
Ul
#08
S
J3I08
840320
0955
18
U
18
U
18
u
18
u
18
u
18
U
18
U
18
Ul
#09
S
J3I09
840320
1030
456
u
456
U
456
u
456
u
456
u
456
U
456
U
456
Ul
#10
S
J3II0
840320
1045
116
u
1 16
U
116
u
116
u
116
u
116
U
116
U
116
Ul
#11
S
J3111
840320
1120
348
u
348
U
348
u
348
u
348
u
348
U
348
u
348
Ul
#12
S
J3112
840320
1135
236
u
236
U
236
u
236
u
236
u
236
U
236
u
236
Ul
#13
S
J3113
840320
1325
100
u
100
U
100
u
100
u
100
u
100
U
100
U
100
Ul
#14
S
J3114
840320
1340
180
u
180
U
180
u
180
u
180
u
180
U
180
U
180
Ul
#15
S
J3115
840320
1345
176
u
176
u
176
u
176
u
176
u
176
U
176
u
176
Ul
#16
S
J3116
840320
1355
40
u
40
u
40
u
40
u
40
u
40
u
40
U
40
Ul
#17
S
J3I 17
840320
1410
216
u
216
u
216
u
216
u
216
u
216
u
216
u
216
Ul
#18
S
J3I 18
840320
1420
21.5
u
21.5
u
21.5
u
21.5
u
21.5
u
21.5
u
21.5
u
21.5
Ul
#19
S
J3119
840320
1430
388
u
388
u
388
u
388
u
388
u
388
u
388
u
388
Ul
#20
S
J3I20
840320
1445
488
u
488
u
488
u
488
u
488
u
488
u
488
u
488
Ul
#21
S
J3I2I
840320
1455
26.4
u
26.4
u
26.4
u
26.4
u
26.4
u
26.4
u
26.4
u
26.4
Ul
#22
S
J3I22
840320
1515
31
u
31
u
31
u
31
u
31
u
31
u
31
u
31
Ul
#23
S
J3123
840320
1525
25.6
u
25.6
u
25.6
u
25.6
u
25.6
u
25.6
u
25.6
u
25.6
Ul
#24
s
J3I24
840320
1530
25
u
25
u
25
u
25
u
25
u
25
u
25
u
25
Ul
#25
s
J3I25
840320
1545
25.3
u
25.3
u
25.3
u
25.3
u
25.3
u
25.3
u
25.3
u
25.3
Ul
#26
s
J3I26
840320
1555
30.8
u
11550

30.8
u
30.8
u
30.8
u
30.8
u
30.8
u
30.8
Ul
#27
s
J3I27
840320
1600
10.6
u
10.6
u
10.6
u
10.6
u
638.4

10.6
u
10.6
u
10.6
Ul
#28
s
J3I28
840320
1612
14.8
u
14.8
u
14.8
u
14.8
u
14.8
u
814

14.8
u
14.8
Ul
#29
s
J3I29
840320
1620
23.3
u
23.3
u
23.3
u
23.3
u
23.3
u
1807

23.3
u
23.3
Ul
#30
s
J3I30
840320
1630
13.4
u
1002

13.4
u
13.4
u
13.4
u
13.4
u
13.4
u
13.4
Ul
#31 OFF LEFT BUSH
s
12181
840321
0810
10
u
10
u
10
u
10
u
10
u
10
u
10
u
40
Ul
#31 OFF LEFT BUSH
w
12182
840321
0810
10
u
10
u
10
u
10
u
10
u
10
u
10
u
40
Ul
#32 NEAR CONCRETE BLOCK
s
12183
840321
0820
10
u
10
u
10
u
10
u
10
u
10
u
10
u
40
Ul
#32 NEAR CONCRETE BLOCK
w
12184
840321
0820
10
u
10
u
10
u
10
u
10
u
10
u
10
u
40
Ul
#33 MIDWAY BLOCK & PIER
s
12185
840321
0840
10
u
10
u
10
u
10
u
10
u
10
u
10
u
40
Ul
#33 MIDWAY BLOCK & PIER
w
12186
840321
0840
10
u
10
u
10
u
10
u
10
u
10
u
10
u
40
Ul
TRANSPORT BLANK
s
J3I34
840321

4.0
u
4.0
u
4.0
u
4.0
u
4.0
u
4.0
u
4.0
u
4.0
Ul
TRANSPORT BLANK

12187
840321

10
u
10
u
10
u
10
u
10
u
10
u
10
u
40
Ul

-------
ORGANIC ANALYSES
U NOT DETECTED — VALUE SHOWN IS THE MINIMUM QUANTIFIABLE LIMIT
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
LAKE UNION SEDIMENT SURVEY	ANALYSES: MEED COMPUCHEM
SEATTLE, WASHINGTON	UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
	BASE / NEUTRALS	
BIS
1,2,4- HEXA HEXA 2-CHLORO 2-CHLORO 1,2-DI I,3-DI
STATION DESCRIPTION
STA WELL OTR
NUM DEPTH M NUM
DATE
TIME
ACENAPH
THENE
BEN
ZIDINE

TRICHLOR
BENZENE
CHLORO
BENZENE
CHLORO
ETHANE

EHTYL)
ETHER

NAPH
THALENE
CHLORO
BENZENE
CHLORO
BENZENE
*01
S
J3I0I
840320
0808
6200
U
24800
U
6200
u
6200
U
6200
U
6200
u
6200
u
6200
u
6200
Ul
#02
S
J3I02
840320
0830
42000
u
168000
U
42000
u
42000
u
42000
u
42000
u
42000
u
42000
u
42000
Ul
#03
S
J3I03
840320
0845
13000

52000
U
13000
u
13000
u
13000
u
13000
u
13000
u
13000
u
13000
Ul
#04
S
J3I04
840320
0900
5000
u
20000
U
5000
u
5000
u
5000
u
5000
u
5000
u
5000
u
5000
Ul
#05
S
J3I05
840320
0913
22190

10000
U
2500
u
2500
u
2500
u
2500
u
2500
u
2500
u
2500
Ul
#0b
S
J3I06
840320
0925
69410

20000
U
5000
u
5000
u
5000
u
5000
u
5000
u
5000
u
5000
Ul
#07
S
J3I07
840320
0938
11000
u
44000
U
11000
u
II000
u
11000
u
II000
u
II000
u
11000
u
11000
Ul
#08
S
J3I08
840320
0955
22080

8800
U
2200
u
2200
u
2200
u
2200
u
2200
u
2200
u
2200
Ul
#09
S
J3I09
840320
1030
4560
M
18240
U
4560
u
4560
u
4560
u
4560
u
4560
u
4560
u
4560
Ul
#10
s
J3110
840320
1045
5200
u
20800
U
5200
u
5200
u
5200
u
5200
u
5200
u
5200
u
5200
Ul
#11
s
J3111
840320
1120
70000
M
280000
u
70000
u
70000
u
70000
u
70000
u
70000
u
70000
u
70000
Ul
#12
s
J3112
840320
1135
76570

18880
u
4720
u
4720
u
4720
u
4720
u
4720
u
4720
u
4720
Ul
#13
s
J3II3
840320
1325
1890
M
50.4U
1000
u
1000
u
1000
u
1000
u
1000
u
1000
u
1000
Ul
#14
s
J3114
840320
1340
967300

92000
u
23000
u
23000
u
23000
u
23000
u
23000
u
23000
u
23000
Ul
#15
s
J3II5
840320
1345
2200
M
8800
u
2200
u
2200
u
2200
u
2200
u
2200
u
2200
u
2200
Ul
#16
s
J3116
840320
1355
37000
u
148000
u
37000
u
37000
u
37000
u
37000
u
37000
u
37000
u
37000
Ul
#17
s
J3I 17
840320
1410
4498600
520000
u
130000
u
130000
u
130000
u
130000
u
130000
u
130000
u
130000 Ul
#m
s
J3II8
840320
1420
129360

8800
u
2200
u
2200
u
2200
u
2200
u
2200
u
2200
u
2200
Ul
#19
s
J3119
840320
1430
73050

14920
u
3730
u
3730
u
3730
u
3730
u
3730
u
3730
u
3730
Ul
#20
s
J3I20
840320
1445
280140

22400
u
5600
u
5600
u
5600
u
5600
u
5600
u
5600
u
5600
Ul
#21
s
J3I2I
840320
1455
100000
M
400000
u
100000
u
100000
u
100000
u
100000
u
100000
u
100000
u
100000 Ul
#22
s
J3I22
840320
1515
238700

24000
u
6000
u
6000
u
6000
u
6000
u
6000
u
6000
u
6000
Ul
#23
s
J3I23
840320
1525
5100
u
20400
u
5100
u
5100
u
5100
u
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-------
ORGANIC ANALYSES
U NOT DETECTED — VALUE SHOWN IS THE MINIMUM QUANTIFIABLE LIMIT
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
LAKE UNION SEDIMENT SURVEY	ANALYSES: MEED COMPUCHEM
SEATTLE, WASHINGTON	UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
	BASE / NEUTRALS	
3,3'-	4-CHLORO 4-BROMO BIS(2-
1,4-DI DICHLORO 2,4- 2,6- 1,2-DI	PICNYL PHENYL CHLOROISO
STA WELL OTR	CHLORO BENZI DINITRO DINITRO PHENYLHY FLUOR PHENYL PHENYL PROPYL)
STATION DESCRIPTION
NUM DEPTH M NUM
DATE
TIME
BENZENE
DINE

TOLUENE
TOLUENE
DRAZAINE ANTHENE
ETHER

ETHER

ETHER

#01
S
J3I0I
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12400
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S
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84000
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#03
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26000
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26000
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26000
Ul
004
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5000
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10000
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10000
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10000
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10000
U140430
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Ul
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5000
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#06
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4400
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2200
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4400
Ul
#09
S
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840320
1030
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9120
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9120
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9120
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9120
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4560
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9120
Ul
#10
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1045
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10400
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10400
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10400
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5200
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10400
Ul
01 1
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70000
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#12
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#13
S
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1000
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#14
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46000
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46000
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#15
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4400
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#16
S
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840320
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74000
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74000
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74000
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74000
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#17
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#16
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#21
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#22
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#23
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#24
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-------
ORGANIC ANALYSES
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON
U NOT DETECTED — VALUE SHOWN IS THE MINIMUM QUANTIFIABLE LIMIT
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
ANALYSES: MEED COMPUCHEM
UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
STA WELL
OTR
BIS HEXA
2-CHLORO CHLORO
ETHOXY BUTA
HEXA
CHLOROCY
CLOPENT
BASE / NEUTRALS
ISO
NAPH
NITRO
N-	N-	N-
NITROSO NITROSO NITROSO
DIMETHYL DIPHENYL DIPROPYL
STATION DESCRIPTION
NUM DEPTH M NUM
DATE
TIME METHANE
DIENE

ADIENE

PHORONE
THALENE
BENZENE AMINE
AMINE

AMINE
*01
S
J3I0I
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6200
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6200
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6200
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6200
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J3I02
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42000
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42000
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42000
M
42000
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1 42000 U
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#03
S
J3I03
840320
0845
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13000
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13000
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13000
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1 13000
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26000 U
#04
S
J3I04
840320
0900
10000
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5000
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5000
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5000
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5000
U
5000
Ul
1 5000 U
10000 U
#05
s
J3I05
840320
0913
5000
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2500
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2500
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2500
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887600

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1 2500
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#06
s
J3I06
840320
0925
10000
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5000
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5000
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5000
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5000
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5000
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1 5000
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#07
s
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1 1000
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11000
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#08
s
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2200
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64400

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1 2200 U
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*09
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9120
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4560
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4560
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#10
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5200
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5200
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5200
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s
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840320
1 120
140000
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70000
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70000
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70000
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70000
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70000
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1 70000
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#12
s
J3112
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1135
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4720
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4720
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4720
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1 4720
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9440 U
#13
s
J3I 13
840320
1325
2000
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1000
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1000
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1000
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1638
M
1000
Ul
1 1000
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#14
s
J3114
840320
1340
46000
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23000
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23000
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23000
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1 23000
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#15
s
J3II5
840320
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2200
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1 2200
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#16
s
J3I 16
840320
1355
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37000
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37000
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37000
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37000
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#17
s
J3I 17
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130000
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130000
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#18
s
J3118
840320
1420
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2200
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2200
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53900

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1 2200
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#19
s
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3730
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3730
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3730
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1 3730
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s
J3I20
840320
1445
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5600
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5600
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5600
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1 5600
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#21
s
J3I2I
840320
1455
200000
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100000
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100000
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100000
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100000
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100000
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#22
s
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#23
s
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s
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5100
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s
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5500
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s
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#27
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840320
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900
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900
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#28
s
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w
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s
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-------
ORGANIC ANALYSES
U NOT DETECTED — VALUE SHOWN IS THE MINIMUM QUANTIFIABLE LIMIT
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
LAKE UNION SEDIMENT SURVEY	ANALYSES: MEED COMPUCHEM
SEATTLE, WASHINGTON	UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
	BASE / NEUTRALS	
BIS
2-ETHYL BENZYL Dl-N- Dl-N-	BENZO A	BENZO B

STA WELL

OTR


HEXYL
BUTYL

BUTYL

OCTYL

DIETHYL
DIMETHYL
ANTHRA

BENZO A
FLUORAN
STATION DESCRIPTION
NUM DEPTH
M NUM
DATE
TIME
PHTHALAT
PHTHALAT
PHTHALAT
PHTHALAT
PHTHALAT
PHTHALAT
CENE

PYRENE

THENE
#01

S
J3I0I
840320
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6200
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6200
U
6200
U
6200
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6200
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6200
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# 02

S
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42000
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#03

S
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13000
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13000
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13000
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#04

S
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5000
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5000
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5000
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5000
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5000
u
5000
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10000
u
IOOOOUI
#05

S
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2500
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2500
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2500
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2500
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126800

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#06

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#07

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-------
ORGANIC ANALYSES
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON
U NOT DETECTED -- VALUE SHOWN IS THE MINIMUM QUANTIFIABLE LIMIT
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
ANALYSES: MEED COMPUCHEM
UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)









-BASE
/ NEUTRAL
S










BENZO K





BENZO




DlBENZO
INDENO

STA
WELL
OTR


FLUORAN

ACENAPH
ANTHRA

GHI



PHENAN
A.H ANTH
1,2.3-CD
STATION DESCRIPTION
NUM
DEPTH M NUM
DATE
TIME
THENE
CHRYSENE
THYLENE
CENE

PERYLENE
FLUORENE
THRENE
RACENE

PYRENE
#01

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12400
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84000
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#03

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278520
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26000U
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J3I04
840320
0900
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5000
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10000
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#05

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177900

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221900
41210

145820
#06

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473250
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50480

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164060
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22000
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303600

16100

19320
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290700
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79800

684000

4560
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#10

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7308
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-------
LAKE UNION SEDIMENT INVESTIGATION
SEATTLE, WASHINGTON
MARCH 20 - 21, 1984
James. Hileman
John Yearsley
Jenny Anderson
ENVIRONMENTAL PROTECTION AGENCY, 1200 SIXTH AVENUE
SEATTLE, WASHINGTON, 98101
JANUARY 1985

-------
DISCLAIMER
This report has been reviewed by the U. S. Environmental Protection
Agency, and approved for public release. Approval does not signify that the
contents necessarily reflect the views or policies of the U. S. Environmental
Protection Agency, nor does mention of trade names or commercial products
constitute endorsement or recommendation for use.
ii

-------
TABLE OF CONTENTS
Page
Di sclaimer
Table of Contents
List of Figures
n
i i i
iv
INTRODUCTION
II. STUDY SCOPE
2
III. SAMPLING AND ANALYTICAL PROCEDURES
2
IV. SUMMARY OF ANALYTICAL METHODS
2
V
RESULTS
6
VI. PROPOSED ADDITIONAL STUDIES
6
APPENDIX A - COMPLETE LISTING OF CHEMICAL CONCENTRATIONS ON A DRY WEIGHT BASIS
INCLUDING THE MINIMUM QUANTIFIABLE LIMITS
APPENDIX B - COMPLETE LISTING OF CHEMICAL CONCENTRATIONS ON A DRY WEIGHT BASIS
EXCLUDING THOSE BELOW THE MINIMUM QUANTIFIABLE LIMIT
APPENDIX C - DEPTH, PERCENT SOLIDS, SEDIMENT DESCRIPTION AND LOCATION
APPENDIX D - PERMITS FOR DREDGING AND OTHER ACTIVITIES OFF SOUTH SHORE OF GAS
WORKS PARK
APPENDIX E - NOAA PUGET SOUND AREA SAMPLING SITES AND SUMMARY OF COMPARISON
DATA
APPENDIX F - RATIONAL FOR ADDITIONAL SAMPLING OF LAKE UNION
i i i

-------
LIST OF FIGURES
Page
FIGURE
1:
LOCATION MAP

3
FIGURE
2:
STATION LOCATION
MAP
4
FIGURE
3
STATION LOCATION
MAP
5
iv

-------
ORGANIC ANALYSES
U NOT DETECTED — VALUE SHOWN IS THE MINIMUM QUANTIFIABLE LIMIT
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
LAKE UNION SEDIMENT SURVEY	ANALYSES: MEED COMPUCHEM
SEATTLE, WASHINGTON	UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
	BASE / NEUTRALS	
STA WELL OTR	BENZO(A)ANTHRACENE/ BENZO(B)FLUORANTHENE/ ANTHRACENE/
STATION DESCRIPTION NUM DEPTH M NUM DATE TIME PYRENE CHRYSENE	BENZO(K)FLUORANTHENE PHENANTHRENE
#01
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#04
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#05
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#06
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#07
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-------
ORUANIC ANALYSES
NOT DETECTED — VALUE SHOWN IS THE MINIMUM QUANTIFIABLE LIMIT
COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
ANALYSES: MEED COMPUCHEM
UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
	VOLATILES	
CARBON	1,2- 1,1,1- 1,1- 1,1,2-
STA WELL OTR	ACRYLO	TETRA CHLORO DICHLORO TRICHLOR DICHLORO TRICHLOR
STATION DESCRIPTION NUM DEPTH M NUM DATE TINE ACROLEIN NITRILE BENZENE CHLORIDE BENZENE ETHANE ETHANE ETHANE ETHANE
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1 120
206

Ul
206

Ul
10.3 U
10.3
U
10.3
U
10.3
Ul
10.3
U
10.3
U
10.3
Ul
#12
S
J3II2
840320
1135
443

Ul
443

Ul
22.I5U
22.15
U
22.15
U
22.15
Ul
22.I5U
22.15
U
22.15
Ul
#13
S
J3I 13
840320
1325
58.
5
Ul
58.
5
Ul
3
U
3
U
3
U
3
Ul
3
U
3
U
3
Ul
#14
S
J3I 14
840320
1340
280

Ul
280

Ul
14
U
14
U
14
U
14
Ul
14
U
14
U
14
Ul
#15
S
J3I 15
840320
1345
264

Ul
264

Ul
13
U
13
U
13
U
13
Ui
13
U
13
U
13
Ul
#16
S
J3116
840320
1355
159

Ul
159

Ul
8
U
8
U
8
u
8
Ul
8
U
8
U
8
Ul
#17
S
J3117
840320
1410
271

Ul
271

Ul
13.5
U
13.5
U
13.5
u
13.5
Ul
13.5
U
13.5
U
13.5
Ul
#18
S
J3I 18
840320
1420
257

Ul
257

Ul
12.8
U
12.8
U
12.8
u
12.8
Ul
12.8
U
12.8
U
12.8
Ul
#19
S
J3119
840320
1430
240

Ul
240

Ul
12
U
12
U
12
u
12
Ul
12
U
12
U
12
Ul
#20
S
J3I20
840320
1445
282

Ul
282

Ul
14
U
14
u
14
u
14
Ul
14
U
14
U
14
Ul
#21
s
J3I2I
840320
1455
325

Ul
325

Ul
16.3
U
16.3
u
16.3
u
16.3
Ul
16.3
U
16.3
u
16.3
Ul
#22
s
J3I22
840320
1515
370

Ul
370

Ul
18.5
M
18.5
u
18.5
u
18.5
Ul
18.5
U
18.5
u
18.5
Ul
#23
s
J3I23
840320
1525
294

Ul
294

Ul
14.7
U
14.7
u
14.7
u
14.7
Ul
14.7
U
14.7
u
14.7
Ul
#24
s
J3I24
840320
1530
301

Ul
301

Ul
15
U
15
u
15
u
15
Ul
15
U
15
u
15
Ul
#25
s
J3I25
840320
1545
31b

ul
316

Ul
15.8
U
15.8
u
15.8
u
15.8
Ul
114

15.8
u
15.8
Ul
#26
s
J3I26
840320
1555
191

Ul
191

Ul
9.5
U
9.5
u
9.5
u
9.5
Ul
9.5
U
9.5
u
9.5
Ul
#27
s
J3I27
840320
1600
127

Ul
127

Ul
6.4
U
6.4
u
6.4
u
6.4
Ul
6.4
U
6.4
u
6.4
Ul
#28
s
J3I28
840320
1612
185

Ul
185

Ul
9.3
U
9.3
u
9.3
u
9.3
Ul
9.3
U
9.3
u
9.3
Ul
#29
s
J3I29
840320
1620
265

Ul
265

Ul
I3.25U
13.25
u
13.25
u
13.25
Ui
I3.25U
13.25
u
13.25
Ul
#30
s
J3I30
840320
1630
156.
5
ul
156.
5
Ul
7.8
U
7.8
u
7.8
u
7.8
Ul
7.8 M
7.8
u
7.8
Ul
#31 OFF LEFT BUSH
s
12101
840321
0810
12

Ul
6

Ul
2.4
U
2.4
u
2.4
u
2.4
Ul
2.4
U
2.4
u
2.4
Ul
#31 OFF LEFT BUSH
w
12182
840321
0810
10

Ul
5

Ul
2
U
2
u
2
u
2
Ul
2
U
2
u
2
Ul
#32 NEAR CONCRETE BLOCK
s
12183
840321
0820
700

Ul
350

Ul
140
M
140
u
140
u
140
Ul
140
U
140
u
140
Ul
#32 NEAR CONCRETE BLOCK
w
12184
840321
0820
10

Ul
5

Ul
2
U
2
u
2
u
2
Ul
2
U
2
u
2
Ul
#33 MIDWAY BLOCK & PIER
s
12185
840321
0840
12

Ul
6

Ul
2.3 M
2.3
u
2.3
u
2.3
Ul
2.3
u
2.3
u
2.3
Ul
#33 MIDWAY BLOCK & PIER
w
12186
840321
0840
10

Ul
5

Ul
2
U
2
u
2
u
2
Ul
2
u
2
u
2
Ul
TRANSPORT BLANK
s
J3I34
840321

50

Ul
50

Ul
2.5
U
2.5
u
2.5
u
2.5
Ul
2.5
u
2.5
u
2.5
Ul
TRANSPORT BLANK

12187
840321

10

Ul
5

Ul
2
U
2
u
2
u
2
Ul
2
u
2
u
2
Ul
U
M
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON

-------
ORGANIC ANALYSES
NOT DETECTED — VALUE SHOWN IS THE MINIMUM QUANTIFIABLE LIMIT
COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
ANALYSES: MEED COMPUCHEM
UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
	VOLATILES	
1,1,2,2-	2-CHLORO	TRANS-	TRANS-
TETRA	ETHYL	1,1- 1,2- 1,2- 1,3- CIS-1,3-
STA WELL OTR	CHLORO CHLORO VINLY CHLORO DICHLORO DICHLORO DICHLORO DICHLORO DICHLORO
STATION DESCRIPTION
NUM DEPTH M NUM
DATE
TIME
ETHANE

ETHANE

ETHER

FORM

ETHENE

ETHENE

PROPANE
PROPENE PROPENE
#01
S
J3I0I
840320
0808
19.25
U
19.25
U
19.25
u
19.25
U
19.25
U
19.25
U
19.25
U
19.25
Ul
38.5 Ul
#02
S
J3I02
840320
0830
26
U
26
U
26
U
26
U
26
U
26
U
26
U
26
Ul
52 Ul
#03
S
J3I03
840320
0845
17.65
U
17.65
U
17.65
U
17.65
U
17.65
U
17.65
U
17.65
u
17.65
Ul
35.3 Ul
#04
S
J3I04
840320
0900
15.25
U
15.25
U
15.25
U
15.25
U
15.25
U
15.25
U
15.25
u
15.25
Ul
30.5 Ul
#05
S
J3I05
840320
0913
25.75
U
25.75
U
25.75
U
25.75
U
25.75
U
25.75
U
25.75
u
25.75
Ul
51.5 Ul
#06
S
J3I06
840320
0925
31.6
U
31.6
U
31.6
u
31.6
U
31.6
U
31.6
U
31.6
u
31.6
Ul
63.1 Ul
#07
S
J3I07
840320
0938
22.75
u
22.75
U
22.75
u
22.75
U
22.75
U
22.75
U
22.75
u
22.75
Ul
45.5 Ul
#08
S
J3I08
840320
0955
11
u
11
U
II
u
11
U
11
U
11
U
11
u
11
Ul
22 Ul
#09
S
J3I09
840320
1030
14.25
u
14.25
U
14.25
u
14.25
U
14.25
U
14.25
U
14.25
u
14.25
Ul
28.5 Ul
#10
S
J3I10
840320
1045
15.3
u
15.3
U
15.3
u
15.3
U
15.3
U
15.3
u
15.3
u
15.3
Ul
30.5 Ul
#1 1
s
J3I11
840320
1120
10.3
u
10.3
U
10.3
u
10.3
U
10.3
U
10.3
u
10.3
u
10.3
Ul
20.6 Ul
#12
s
J3112
840320
1135
22.15
u
22.15
U
22.15
u
22.15
U
22.15
U
22.15
u
22.15
u
22.15
Ul
44.3 Ul
#13
s
J3II3
840320
1325
3
u
3
U
3
u
3
U
3
U
3
u
3
u
3
Ul
5.8 Ul
#14
s
J3II4
840320
1340
14
u
14
U
14
u
14
U
14
U
14
u
14
u
14
Ul
28 Ul
#15
s
J3I 15
840320
1345
13
u
13
U
13
u
13
U
13
U
13
u
13
u
13
Ul
26 Ul
#16
s
J3II6
840320
1355
8
u
8
U
8
u
8
U
8
U
8
u
8
u
8
Ul
16 Ul
#17
s
J3I 17
840320
1410
13.5
u
13.5
U
13.5
u
13.5
U
13.5
u
13.5
u
13.5
u
13.5
Ul
27 Ul
#18
s
J3118
840320
1420
12.8
u
12.8
U
12.8
u
12.8
U
12.8
u
12.8
u
12.8
u
12.8
Ul
25 Ul
#19
s
J3119
840320
1430
12
u
12
U
12
u
12
U
12
u
12
u
12
u
12
Ul
24 Ul
#20
s
J3I20
840320
1445
14
u
14
U
14
u
14
U
14
u
14
u
14
u
14
Ul
28 Ul
#21
s
J3I2I
840320
1455
16.3
u
16.3
U
16.3
u
16.3
U
16.3
u
16.3
u
16.3
u
16.3
Ul
32.6 Ul
#22
s
J3I22
840320
1515
18.5
u
18.5
U
18.5
u
18.5
U
18.5
u
18.5
u
18.5
u
18.5
Ul
37 Ul
#23
s
J3I23
840320
1525
14.7
u
14.7
U
14.7
u
14.7
U
14.7
u
14.7
u
14.7
u
14.7
Ul
29.4 Ul
#24
s
J3I24
840320
1530
15
u
15
u
15
u
15
U
15
u
15
u
15
u
15
Ul
30 Ul
#25
s
J3I25
840320
1545
15.8
u
15.8
u
15.8
u
15.8
u
15.8
u
15.8
u
15.8
u
15.8
Ul
31.6 Ul
#26
s
J3I26
840320
1555
9.5
u
9.5
u
9.5
u
9.5
u
9.5
u
9.5
u
9.5
u
9.5
Ul
19.1 Ul
#27
s
J3I27
840320
1600
6.4
u
6.4
u
6.4
u
6.4
u
6.4
u
6.4
u
6.4
u
6.4
Ul
12.8 Ul
#28
s
J3I28
840320
1612
9.3
u
9.3
u
9.3
u
9.3
u
9.3
u
9.3
u
9.3
u
9.3
Ul
18.5 Ul
#29
s
J3I29
840320
1620
13.25
u
13.25
u
13.25
u
13.25
u
13.25
u
13.25
u
13.25
u
13.25
Ul
26.5 Ul
#30
s
J3I30
840320
1630
7.8
u
7.8
u
7.8
u
7.8
u
7.8
u
7.8
u
7.8
u
7.8
Ul
15.6 Ul
#31 OFF LEFT BUSH
s
12181
840321
0810
2.4
u
2.4
u
2.4
u
2.4
u
2.4
u
2.4
u
2.4
u
2.4
Ul
2.4 Ul
#31 OFF LEFT BUSH
w
12182
840321
0810
2
u
2
u
2
u
2
u
2
u
2
u
2
u
2
Ul
2 Ul
#32 NEAR CONCRETE BLOCK
s
12183
840321
0820
140
u
140
u
140
u
140
u
140
u
140
u
140
u
140
Ul
140 Ui
#32 NEAR CONCRETE BLOCK
w
12184
840321
0820
2
u
2
u
2
u
2
u
2
u
2
u
2
u
2
Ul
2 Ul
#33 MIDWAY BLOCK & PIER
s
12185
840321
0840
2.3
u
2.3
u
2.3
u
2.3
u
2.3
u
2.3
u
2.3
u
2.3
Ul
2.3 Ul
#33 MIDWAY BLOCK & PIER
w
12186
840321
0840
2
u
2
u
2
u
2
u
2
u
2
u
2
u
2
Ul
2 Ul
TRANSPORT BLANK
s
J3I34
840321

2.5
u
2.5
u
2.5
u
2.5
u
2.5
u
2.5
u
2.5
u
2.5
Ul
2.5 Ul
TRANSPORT BLANK

12187
840321

2
u
2
u
2
u
2
u
2
u
2
u
2
u
2
Ul
2 Ul
U
M
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON

-------
ORGANIC ANALYSES
U NOT DETECTED — VALUE SHOWN IS THE MINIMUM QUANTIFIABLE LIMIT
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
LAKE UNION SEDIMENT SURVEY	ANALYSES: MEED COMPUCHEM
SEATTLE, WASHINGTON	UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
	VOLAT I LES	
METHYL	BROMO FLUORO DICHLORO CHLORO

STA
WELL
OTR


ETHYL

LENE

CHLORO

BROMO

BROMO

DICHLORO TRICHLOR
DlFLUORO DlBROMO
STATION DESCRIPTION
NUM
DEPTH M
NUM
DATE
TIME
BENZENE
CHLORIDE
METHANE
METHANE
FORM

METHANE
METHANE
METHANE
METHANE
#01

S
J3I0I
840320
0808
19.25
U
I9.25M
19.25
U
19.25
U
19.25
U
19.25
u
19.25
U
19.25
U
19.25 Ul
#02

S
J3I02
840320
0830
26
M
52
U
52
U
52
U
52
U
52
U
52
U
52
U
52 Ul
#03

S
J3I03
840320
0845
17.65
U
I7.65U
17.65
U
17.65
U
17.65
u
17.65
U
17.65
U
17.65
U
17.65 Ul
*04

S
J3I04
840320
0900
15.25
U
1244

15.25
U
15.25
U
15.25
u
15.25
U
15.25
U
15.25
U
15.25 Ul
#05

S
J3I05
840320
0913
621

25.75U
25.75
u
25.75
U
25.75
u
25.75
U
25.75
U
25.75
u
25.75 Ul
*06

S
J3I06
840320
0925
31.6
U
31.6
U
31.6
u
31.6
U
31.6
u
31.6
U
31.6
U
31.6
u
31.6 Ul
#07

S
J3I07
840320
0938
22.75
U
3664

22.75
u
22.75
U
22.75
u
22.75
U
22.75
M
22.75
u
22.75 Ul
#08

S
J3I08
840320
0955
11
U
83

1 1
u
1 1
U
11
u
11
U
II
U
II
u
11 Ul
#09

S
J3I09
840320
1030
14.25
U
I4.25M
14.25
u
14.25
U
14.25
u
14.25
u
14.25
M
14.25
u
14.25 Ul
#10

S
J3II0
840320
1045
15.3
U
1035

15.3
u
15.3
U
15.3
u
15.3
U
15.3
M
15.3
u
15.3 Ul
#11

S
J311 1
840320
1120
10.3
U
52.6

10.3
u
10.3
U
10.3
u
10.3
u
10.3
U
10.3
u
10.3 Ul
#12

S
J3I 12
840320
1135
22.15
U
22.I5U
22.15
u
22.15
U
22.15
u
22.15
u
22.15
U
22.15
u
22.15 Ul
#13

S
J3113
840320
1325
3
U
3
M
3
u
3
U
3
u
3
u
3
U
3
u
3 Ul
#14

S
J3114
840320
1340
14
U
159

14
u
14
u
14
u
14
u
14
M
14
u
14 Ul
#15

S
J3115
840320
1345
13
U
13
M
13
u
13
u
13
u
13
u
13
U
13
u
13 Ul
#16

S
J3116
840320
1355
8
u
51

8
u
8
u
8
u
8
u
8
M
8
u
8 Ul
#17

S
J3117
840320
1410
13.5
u
3957

13.5
u
13.5
u
13.5
u
13.5
u
13.5
U
13.5
u
13.5 Ul
#18

S
J3118
840320
1420
12.8
u
1132

12.8
u
12.8
u
12.8
u
12.8
u
12.8
U
12.8
u
12.8 Ul
#19

S
J3119
840320
1430
12
u
1023

12
u
12
u
12
u
12
u
12
M
12
u
12 Ul
#20

S
J3I20
840320
1445
14
u
1035

14
u
14
u
14
u
14
u
14
U
14
u
14 Ul
#21

S
J3I2I
840320
1455
16.3
u
507

16.3
u
16.3
u
16.3
u
16.3
u
16.3
U
16.3
u
16.3 Ul
#22

S
J3I22
840320
1515
454

1155

18.5
u
18.5
u
18.5
u
18.5
u
18.5
U
18.5
u
18.5 Ul
#23

S
J3I23
840320
1525
14.7
u
15360

14.7
u
14.7
u
14.7
u
14.7
u
14.7
U
14.7
u
14.7 Ul
#24

S
J3I24
840320
1530
15
u
15
M
15
u
15
u
15
u
15
u
15
U
15
u
15 Ul
#25

S
J3I25
840320
1545
15.8
u
15.8
M
15.8
u
15.8
u
15.8
u
15.8
u
158

15.8
u
15.8 Ul
#26

s
J3I26
840320
1555
9.5
u
57

9.5
u
9.5
u
9.5
u
9.5
u
9.5
U
9.5
u
9.5 Ul
#27

s
J3I27
840320
1600
6.4
u
193.0

6.4
u
6.4
u
6.4
u
6.4
u
6.4
U
6.4
u
6.4 Ul
#28

s
J3I28
840320
1612
9.3
u
99.9

9.3
u
9.3
u
9.3
u
9.3
u
9.3
U
9.3
u
9.3 Ul
#29

s
J3I29
840320
1620
13.25
u
187

13.25
u
13.25
u
13.25
u
13.25
u
13.25
u
13.25
u
13.25 Ul
#30

s
J3I30
840320
1630
7.8
u
127

7.8
u
7.8
u
7.8
u
7.8
u
7.8
M
7.8
u
7.8 Ul
#31 OFF LEFT BUSH

s
12181
840321
0810
2.4
u
2.4
U
2.4
u
2.4
u
2.4
u
2.4
u
2.4
U
2.4
u
2.4 Ul
#31 OFF LEFT BUSH

w
12182
840321
0810
2
u
2
U
2
u
2
u
2
u
2
u
2
U
2
u
2 Ul
#32 NEAR CONCRETE BLOCK

s
12183
840321
0820
140
u
140
U
140
u
140
u
140
u
140
u
140
U
140
u
140 Ul
#32 NEAR CONCRETE BLOCK

w
12184
840321
0820
2
u
2
U
2
u
2
u
2
u
2
u
2
U
2
u
2 Ul
#33 MIDWAY BLOCK 4 PIER

s
12185
840321
0840
2.3
u
2.3
U
2.3
u
2.3
u
2.3
u
2.3
u
2.3
U
2.3
u
2.3 Ul
#33 MIDWAY BLOCK & PIER

w
12186
840321
0840
2
u
2
u
2
u
2
u
2
u
2
u
2
U
2
u
2 Ul
TRANSPORT BLANK

s
J3I34
840321

5.0
u
2300

2.5
u
2.5
u
2.5
u
2.5
u
2.5
M
2.5
u
2.5 Ul
TRANSPORT BLANK


12187
840321

2
u
2
u
2
u
2
u
2
u
2
u
2
U
2
u
2 Ul

-------
ORGANIC ANALYSES
U NUI UtltUtL) — VALUt SHOWN lb IHt MINIMUM (JUANIIMAHLt LIMII
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
LAKE UNION SEDIMENT SURVEY	ANALYSES: MEED COMPUCHEM
SEATTLE, WASHINGTON	UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
		 VOLAT ILES			
TETRA
STA WELL OTR	CHLORO	TRICHLOR VINYL
STATION DESCRIPTION
NUM DEPTH M
NUM
DATE
TIME
ETHENE

TOLUENE
ETHENE

CHLORIDE
#01
S
J3I0I
840320
0808
19.25
U
19.25
U
19.25
U
19.25
Ul
*02
S
.13102
840320
0830
52
U
52
U
52
U
52
Ul
#03
S
J3I03
840320
0845
17.65
U
17.65
U
17.65
U
17.65
Ul
#04
S
J3I04
840320
0900
15.25
U
15.25
U
15.25
U
15.25
Ul
#05
S
J3I05
840320
0913
25.75
U
25.75
U
25.75
U
25.75
Ul
#06
S
J3I06
840320
0925
31.6
U
31.6
U
31.6
u
31.6
Ul
#07
S
J3I07
840320
0938
22.75
U
22.75
U
22.75
u
22.75
Ul
#08
S
J3I08
840320
0955
1 1
U
II
U
11
u
11
Ul
#09
S
J3I09
840320
1030
14.25
U
14.25
U
14.25
u
14.25
Ul
#10
S
J3II0
840320
1045
15.3
U
15.3
U
15.3
u
15.3
Ul
#11
S
J3I 1 1
840320
1120
10.3
U
10.3
U
10.3
u
10.3
Ul
#12
S
J3112
840320
1135
22.15
U
22.15
U
22.15
u
22.15
Ul
#13
s
J3113
840320
1325
3
U
3
U
3
u
3
Ul
#14
s
J3I 14
840320
1340
14
u
14
U
14
u
14
Ul
#15
s
J3II5
840320
1345
13
u
13
U
13
u
13
Ul
#16
s
J3II6
840320
1355
8
u
8
U
8
u
8
Ul
#17
s
J3117
840320
1410
13.5
u
13.5
u
13.5
u
13.5
Ul
#18
s
J3I 18
840320
1420
12.8
u
12.8
u
12.8
u
12.8
Ul
#19
s
J3I 19
840320
1430
12
u
12
u
12
u
12
Ul
#20
s
J3I20
840320
1445
14
u
14
u
14
u
14
Ul
#21
s
J3I2I
840320
1455
16.3
u
16.3
u
16.3
u
16.3
Ul
#22
s
J3I22
840320
1515
18.5
u
18.5
M
18.5
u
18.5
Ul
#23
s
J3I23
840320
1525
14.7
u
14.7
U
14.7
u
14.7
Ul
#24
s
J3I24
840320
1530
15
u
15
U
15
u
15
Ul
#25
s
J3I25
840320
1545
15.8
u
15.8
U
15.8
u
15.8
Ul
#26
s
J3I26
840320
1555
9.5
u
9.5
U
9.5
u
9.5
Ul
#27
s
J3I27
840320
1600
6.4
u
6.4
u
6.4
u
6.4
Ul
#28
s
J3I28
840320
1612
9.3
u
9.3
u
9.3
u
9.3
Ul
#29
s
J3I29
840320
1620
13.25
u
13.25
u
13.25
u
13.25
Ul
#30
s
J3I30
840320
1630
7.8
u
7.8
u
7.8
u
7.8
Ul
#31 OFF LEFT BUSH
s
12181
840321
0810
2.4
u
2.4
u
2.4
u
2.4
Ul
#31 OFF LEFT BUSH
w
12182
840321
0810
2
u
2
u
2
u
2
Ul
#32 NEAR CONCRETE BLOCK
s
12183
840321
0820
140
u
140
u
140
u
140
Ul
#32 NEAR CONCRETE BLOCK
w
12184
840321
0820
2
u
2
u
2
u
2
Ul
#33 MIDWAY BLOCK & PIER
s
12185
840321
0840
2.3
u
2.3
u
2.3
u
2.3
Ul
#33 MIDWAY BLOCK 4 PIER
w
12186
840321
0840
2
u
2
u
2
u
2
Ul
TRANSPORT BLANK
s
J3I34
840321

2.5
u
2.5
u
2.5
u
2.5
Ul
TRANSPORT BLANK

12187
840321

2
u
2
u
2
u
2
Ul

-------
APPENDIX B
COMPLETE LISTING OF CHEMICAL CONCENTRATIONS ON A DRY WEIGHT BASIS
EXCLUDING THOSE BELOW THE MINIMUM QUANTIFIABLE LIMIT

-------
INORGANICS ~ METALS
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON
STA WELL ITR
STAT 1 ON DESCR1PT1ON NUM
DEPTH M NUM
DATE
TIME
#01
S
12151
840320
0808
#02
S
12152
840320
0830
#03
S
12153
840320
0845
#04
S
12154
840320
0900
#05
S
12155
840320
0913
#06
S
12156
840320
0925
#07
S
12157
840320
0938
#08
S
12158
840320
0955
#09
S
12159
840320
1030
#10
S
12160
840320
1045
#11
S
12161
840320
1120
#12
S
12162
840320
1135
#13
S
12163
840320
1325
#14
S
12164
840320
1340
#15
S
12165
840320
1345
#16
S
12166
640320
1355
#17
S
12167
840320
1410
#18
S
12168
840320
1420
#19
S
12169
840320
1430
#20
S
12170
840320
1445
#21
S
121 71
840320
1455
#22
S
12172
840320
1515
#23
S
12173
840320
1525
#24
S
12174
840320
1530
#25
S
12175
840320
1545
#26
S
12176
840320
1555
#27
S
12177
840320
1600
#28
S
12178
840320
1612
#29
S
12179
840320
1620
#30
s
12180
840320
1630
#31 OFF LEFT BUSH
s
12181
840321
0810
#31 OFF LEFT BUSH
W
12182
840321
0810
#32 NEAR CONCRETE BLOCK
s
12183
840321
0820
#32 NEAR CONCRETE BLOCK
w
12184
840321
0820
#33 MIDWAY BLOCK 4 PIER
s
12185
840321
0840
#33 MIDWAY BLOCK 4 PIER
w
12186
840321
0840
TRANSPORT BLANK

12187
840321

ANALYSES: EPA LAB — MANCHESTER
UNITS: SEDIMENT MG/KG (PPM) DRY WEIGHT BASIS
WATER MG/L (PPM)
	METALS PARAMETERS	
CR	BA* BE	CO* CU	FE* Nl
55.5	I	I	.45	I	I	168	I	I 62.7
55.1	I	I	.39	I	I	192	I	I 291
52.3	I	I	.35	I	I	205	I	I 71.0
61.5	I	I	.48	I	I	162	I	I 73.3
32.9	I	I	.33	I	I	134	I	I 265
57.0	I	I	.45	I	I	174	I	I 97.6
54.1	I	I	.33	I	I	169	I	I 56.4
35.9	I	I	.31	I	I	79	I	I 223
48.5	I	I	.34	I	I	158	I	I 94.5
53.8	I	I	.40	I	I	163	I	I 64.0
32.4	I	I	.26	I	I	72	I	I 202
47.6	I	I	.35	I	I	152	I	I 125
22.1	I	I	.20	I	I	24	I	I 47.1
47.6	I	I	.41	I	I	138	I	I 130
61.6	I	I	.42	I	I	250	I	I 72.8
26.0	I	I	.21	I	I	104	I	I 88.0
36.3	I	I	.34	I	I	120	I	I 162
56.7	I	I	.46	I	1171	I	I 132
47.4	I	I	.31	I	I	186	I	I 91.6
62.6	I	I	.48	I	I	181	I	I 85.8
45.2	I	I	.37	I	I	175	I	I 141
59.2	I	I	.50	I	I	301	I	I 70.8
64.8	I	I	.50	I	I	230	I	I 110
83.7	I	I	.51	I	I	375	I	I 94.5
86.6	I	I	.50	I	I	484	I	I 92.0
74.4	I	I	.44	I	I	587	I	I 69.1
75.1	I	I	.80	I	I	124	I	I 93.2
65.5	I	I	.62	I	I	184	I	I 78.6
67.6	I	I	.56	I	I	242	I	I 71.4
70.3	I	I	.55	I	I	121	I	I 84.8
17.4	I	I	.22	I	I	23	I	I 98.9
.001	I	I	I	I	.0581	I .062
13.9	I	I	.15	I	I	88	I	I 89.7
13	I	I	I	I	200	I	I 220
18.1	I	I	.25	I	I	32	I	I 206
.013	I	I	I	I	.0781	I .613
I	I	I	I	.0371	I .012

-------
INORGANICS — METALS
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON

STA
WELL

ITR

STATION DESCRIPTION
NUM
DEPTH
M
NUM
DATE TIME
#01


S
12151
840320 0808
#02


S
12152
840320 0830
#03


S
12153
840320 0845
#04


S
12154
840320 0900
#05


S
12155
840320 0913
#06


S
12156
840320 0925
#07


S
12157
840320 0938
#08


S
12158
840320 0955
#09


S
12159
840320 1030
#10


S
12160
840320 1045
#11


S
12161
840320 1120
#12


S
12162
840320 1135
#13


S
12163
840320 1325
#14


S
12164
840320 1340
#15


S
12165
840320 1345
#16


S
12166
840320 1355
#17


S
12167
840320 1410
#18


S
12168
840320 1420
#19


S
12169
840320 1430
#20


S
12170
840320 1445
#21


S
121 71
840320 1455
#22


S
12172
840320 1515
#23


S
12173
840320 1525
#24


S
12174
840320 1530
#25


S
12175
840320 1545
#26


s
12176
840320 1555
#27


s
12177
840320 1600
#28


s
12178
840320 1612
#29


s
12179
840320 1620
#30


s
12180
840320 1630
#31 OFF LEFT BUSH


s
12181
840321 0810
#31 OFF LEFT BUSH


w
12182
840321 0810
#32 NEAR CONCRETE BLOCK


s
12183
840321 0820
#32 NEAR CONCRETE BLOCK


w
12184
840321 0820
#33 MIDWAY BLOCK & PIER


s
12185
840321 0840
#33 MIDWAY BLOCK & PIER


w
12186
840321 0840
TRANSPORT BLANK



12187
840321
ANALYSES: EPA LAB — MANCHESTER
UNITS: SEDIMENT MG/KG (PPM) DRY WEIGHT BASIS
WATER MG/L (PPM)
METALS PARAMETERS
~
>
CD
5
AG
AS
SB
SE
456 1 1
12.45
34.5
.9
.4
431 1 1
10.27
284
.3
.2
482 1 1
11.21
53.5
.5
.2
450 1 1
10.60
27.6
.3
.3
293 I 1
10.18
39.0
.1
.2
427 1 1
1 1.82
36.5
.4
.5
416 1 1
13.02
55.5
.4
.5
210 1 1
10.33
12.8
.1

352 I I
11.15
26.9
.4
.3
420 1 1
10.31
33.1
.3
.4
153 1 1
10.47
21.7
.2

336 1 1
12.45
35.0
.2
.2
70 I 1
10.06
3.6


327 1 1
12.49
27.5
.3
.3
485 I 1
13.77
31.9

.5
175 1 1
10.61
11.7
.3

250 1 1
11.59
22.1
.3
.2
382 I 1
12.68
26.2


350 I I
12.64
31.0
.5
.2
454 1 1
13.99
28.7

.7
285 1 1
1 1.04
18.3
.7
.6
648 1 1
12.23
85.0
.1
.2
476 I 1
11.53
23.0
.1
.6
708 I 1
10.54
42.5

.8
740 1 1
11.95
33.0

.2
1058 I 1
13.18
168
6.4
.5
177 I 1
11.02
10.4
.2
.6
512 I 1
16.91
20.2
.3

668 I I
15.65
28.0
.2
.4
276 1 1
14.47
12.6
.1
.4
71 1 1
1
5.7
4.9

.0471 1
1

.001

51 I 1
1
13.2
25.0

100 1 1
1
25
7

75 1 1
1
6.7
.1

.0711 1
1
.048
.001

.0011 1
1




-------
INORGANICS — METALS
M
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON
STA WELL ITR		M E
STATION DESCRIPTION
NUM DEPTH M
NUM
DATE
TIME
TL
#01
S
12151
840320
0808

#02
S
12152
840320
0830

#03
S
12153
840320
0845
. 1
#04
S
12154
840320
0900
.1
#05
S
12155
840320
0913

#06
S
12156
840320
0925
. 1
#07
S
12157
840320
0938

#08
S
12158
840320
0955

#09
S
12159
840320
1030
.2
#10
S
12160
840320
1045
.1
#11
S
12161
840320
1120
.1
#12
S
12162
840320
1135
.2
#13
S
12163
840320
1325

#14
S
12164
840320
1340

#15
S
12165
840320
1345
.1
#16
S
12166
840320
1355
.2
#17
S
12167
840320
1410

#18
S
12168
840320
1420
.3
#19
S
12169
840320
1430

#20
S
12170
840320
1445

#21
S
121 71
840320
1455

#22
S
12172
840320
1515
.2
#23
S
12173
840320
1525

#24
S
12174
840320
1530

#25
S
12175
840320
1545

#26
s
12176
840320
1555
.1
#27
s
12177
840320
1600
.2
#28
s
12178
840320
1612
. 1
#29
s
12179
840320
1620

#30
s
12180
840320
1630
.2
#31 OFF LEFT BUSH
s
12181
840321
0810

#31 OFF LEFT BUSH
w
12182
840321
0810

#32 NEAR CONCRETE BLOCK
s
12183
840321
0820

#32 NEAR CONCRETE BLOCK
W
12184
840321
0820

#33 MIDWAY BLOCK 4 PIER
s
12185
840321
0840

#33 MIDWAY BLOCK & PIER
w
12186
840321
0840

TRANSPORT BLANK

12187
840321


COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
ANALYSES: EPA LAB — MANCHESTER
UNITS: SEDIMENT MG/KG (PPM) DRY WEIGHT BASIS
WATER MG/L (PPM)
A L S
PARAMETE
R S	

HG
SN# CD
PB PHENOLIC
CN
1.1361
12.1
397 I

2.6261
1 1.5
416 1
1680
1.4831
12.2
541 1
168
1.4181
12.1
324 1
5.8
I.II4I
11.4
296 I
1190
1.3561
12.0
288 1
96.6
1.3981
12.3
512 1
17.7
.5871
1 1.0
158 1
6.5
.9831
11.7
471 1
21.7
1.3251
12.4
377 1
.78
.4941
10.2
101 1
3.8
.7801
12.1
319 I
16.5
.0511
10.3
28 I
.24
.7981
11.9
263 1
1.4
1.2551
12.0
466 I
.83
.3111
10.8
284 1
8.0
.5701
II.0
199 I
5.3
I.I 771
10.3
277 1
4.6
.7751
11.5
403 I
7.3
1.0601
12.3
311 1
4.1
1.3891
10.4
185 I
1.4
1.0321
1 1.8
508 I
3.9
1.1621
10.6
304 I
1.5
3.1731
12.2
455 1
1.2
4.2931
10.5
441 I
.72
2.6191
10.2
720 1
1.2
.4581
10.1
60 I
.43
1.5551
12.0
381 1
I.I
2.3161
12.3
572 1
1.9
1.2271
11.2
262 1
.93
.0341
1 .2
126 I
15
1
1 .0002
.0781
.43
.7571
1 .1
962 I
215
1.48 1
1
1225 1
7.2
.0591
1 .3
37 1
5.0
1
1
1 .0002
1
.0781
.0191
.05

-------
ORGANIC ANALYSES
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON
ANALYSES:
UNITS:
STATION DESCRIPTION
STA WELL OTR
NUM DEPTH M NUM
DATE
4,6,Dl
NITRO 0
TIME CRESOL
	A C
PENTA
CHLORO
PHENOL PHENOL
#05
#07
S J3I05 840320 0913
S J3I07 840320 0938
I	120922 I
1375560 I	I
MEED COMPUCHEM
SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
D COMPOUNDS

-------
ORGANIC ANALYSES
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON
COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
ANALYSES: MEED COMPUCHEM
UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
STATION DESCRIPTION
STA WELL OTR
NUM DEPTH M NUM
DATE TIME ALDRIN
CHLOR-
DIELDRIN DANE
PEST
4,4'-
DDT
C I D E S	
4,4'- 4,4'-
DDE DDD
A-ENDO
SULFAN
B-ENDO
SULFAN
404
# 14
#28
S J3I04 840320 0900
S J3II4 840320 1340
S J3I28 840320 1612
I
I
1777
I 143
1853
Ml
Ml

-------
ORGANIC ANALYSES
ANALYSES: MEED COMPUCHEM
UNITS: SEDIMENT UG/KG CPPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
STA WELL OTR		PCB	TOXA- TCDD
STATION DESCRIPTION NUM DEPTH M NUM DATE TIME PCB-1242 PCB-1254 PCB-1221 PCB-1232 PCB-1248 PCB-1260 PCB-1016 PHENE DI OXIN
#01	S	J3I0I	840320 0808	14466	I	I	I	I
#26	S	J3I26	840320 1555	111550	I	I	I	I
#27	S	J3I27	840320 1600	I	I	I	I	638.4 I
#28	S	J3I28	840320 1612	I	I	I	I	I 814
#29	S	J3I29	840320 1620	I	I	I	I	11807
#30	S	J3I30	840320 1630	11002	I	I	I	I
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON

-------
ORGANIC ANALYSES
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON
COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
ANALYSES: MEED COMPUCHEM
UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
BASE / NEU

STA WELL
OTR


ACENAPH BEN
STATION DESCRIPTION
NUM DEPTH M NUM
DATE
TIME
THENE ZIDINE
#03
S
J3I03
840320 0845
13000 I
#05
S
J3I05
840320
0913
22190 I
#06
s
J3I06
840320
0925
69410 1
#08
s
J3I08
840320
0955
22080 1
#09
s
J3I09
840320
1030
4560 Ml
#1 1
s
J3II1
840320
1120
70000 Ml
#12
s
J3112
840320
1135
76570 1
#13
s
J3113
840320
1325
1890 Ml
#14
s
J3II4
840320
1340
967300 1
#15
s
J3115
840320
1345
2200 Ml
#17
s
J3117
840320
1410
4498600 I
#16
s
J3II8
840320
1420
129360 1
#19
s
J3I 19
840320
1430
73050 I
#20
s
J3I20
840320
1445
280140 1
#21
s
J3I2I
840320
1455
100000 Ml
#22
s
J3I22
840320
1515
238700 1
#31 OFF LEFT BUSH
s
12181
840321
0810
34 1
#31 OFF LEFT BUSH
w
12182
840321
0810
.2 I
#32 NEAR CONCRETE BLOCK
s
12183
840321
0820
270 I
#32 NEAR CONCRETE BLOCK
w
12184
840321
0820
.7 1
#33 MIDWAY BLOCK & PIER
s
12185
840321
0840
220 I
#33 MIDWAY BLOCK & PIER
w
12186
840321
0840
6.6 1
1,2,4- HEXA HEXA
TRICHLOR CHLORO CHLORO
BENZENE BENZENE ETHANE
T R A L S	
BIS
2-CHLORO 2-CHLORO 1,2-01 1,3-DI
EHTYL) NAPH CHLORO CHLORO
ETHER THALENE BENZENE BENZENE

-------
ORGANIC ANALYSES
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
LAKE UNION SEDIMENT SURVEY	ANALYSES: MEED COMPUCHEM
SEATTLE, WASHINGTON	UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
	BASE / NEUTRALS	
3,3'-	4-CHLORO 4-BROMO
1,4-DI DICHLORO 2,4- 2,6- 1,2-DI	PHENYL PHENYL
STA WELL OTR	CHLORO BENZI DINITRO DINITRO PHENYLHY FLUOR PHENYL PHENYL
STATION DESCRIPTION NUM DEPTH M NUM DATE TIME BENZENE DINE TOLUENE TOLUENE DRAZAINE ANTHENE ETHER ETHER
401
S
J3I0I
840320
0808 1 1
1 1 1161700 1
#02
S
J3I02
840320
0830 1 1
1 1 1260000 1
# 03
S
J3I03
840320
0845 1 1
1 1 1438880 1
#04
S
J3I04
840320
0900 i 1
1 1 140430 1
#05
S
J3I05
840320
0913 1 1
1 1 1317000 1
#06
S
J3I06
840320
0925 1 1
1 1 1208230 1
#07
S
J3I07
840320
0938 1 1
1 1 1210680 1
#08
S
J3I08
840320
0955 1 1
1 1 1506000 1
#09
S
J3I09
840320
1030 1 1
1 1 1524400 1
#10
S
J3II0
840320
1045 1 1
1 1 122000 I
#1 1
S
J311 1
840320
II20 1 1
1 1 11839600 1
#12
S
J3I 12
840320
1135 1 1
1 1 11472500 1
#13
S
J3113
840320
1325 1 1
1 1 121420 1
#14
S
J3II4
840320
1340 1 I
1 1 13414000 1
#15
S
J3I 15
840320
1345 1 1
1 1 II8282 1
#16
S
J3116
840320
1355 I 1
1 1 1295740 1
#17
S
J3117
840320
1410 1 1
1 1 1298100001
#18
S
J3118
840320
1420 1 1
1 1 1646800 1
#19
S
J3I 19
840320
1430 1 1
1 1 1730500 1
#20
S
J3I20
840320
1445 1 1
1 1 11827000 I
#21
S
J3I2I
840320
1455 1 1
1 1 12636000 1
#22
S
J3I22
840320
1515 1 1
1 1 1553846 1
#23
S
J3I23
840320
1525 1 1
1 1 193750 1
#24
S
J3I24
840320
1530 1 1
1 1 1298450 1
#25
S
J3I25
840320
1545 1 1
1 1 175840 1
#26
s
J3I26
840320
1555 1 1
1 1 119231 1
#28
s
J3I28
840320
1612 1 1
1 1 1 5550 1
#29
s
J3I29
840320
1620 1 1
1 1 1 2300 Ml
*30
s
J3I30
840320
1630 1 1
1 1 114696 1
#31 OFF LEFT BUSH
s
12181
840321
0810 1 1
1 1 1 4500 1
#31 OFF LEFT BUSH
w
12182
840321
0810 1 1
1 1 1 25 1
#32 NEAR CONCRETE BLOCK
s
12183
840321
0820 I 1
1 1 1 3200 1
#32 NEAR CONCRETE BLOCK
w
12184
840321
0820 1 1
1 1 1 19 1
#33 MIDWAY BLOCK 4 PIER
s
12185
840321
0840 1 1
1 1 134000 1
#33 MIDWAY BLOCK 4 PIER
w
12186
840321
0840 1 1
1 1 1 510 1
BISC 2—
CHLORO I SO
PROPYL)
ETHER

-------
ORGANIC ANALYSES
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
LAKE UNION SEDIMENT SURVEY	ANALYSES: MEED COMPUCHEM
SEATTLE, WASHINGTON	UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
	BASE / NEUTRALS	
BIS HEXA HEXA	N-	N-	N-
2-CHLORO CHLORO CHLOROCY	NITROSO NITROSO NITROSO
STA WELL OTR	ETHOXY BUTA CLOPENT ISO NAPH NITRO DIMETHYL DIPHENYL DIPROPYL
STATION DESCRIPTION NUM DEPTH M NUM DATE TIME METHANE DIENE ADIENE PHORONE THALENE BENZENE AMINE AMINE AMINE
#02

S
J3I02
840320
0830 1
1 1 142000 Ml
#03

S
J3I03
840320
0845 1
1 1 1109720 1
#05

S
J3I05
840320
0913 1
1 1 1887600 1
#06

S
J3I06
840320
0925 1
1 1 1 5000 Ml
#08

S
J3I08
840320 0955 1
1 1 164400 1
#09

S
J3I09
840320
1030 1
1 1 162700 1
#12

S
J3II2
840320
1135 1
1 1 188350 1
#13

S
J3II3
840320
1325 1
1 1 1 1638 Ml
#14

S
J3I 14
840320
1340 I
1 1 1221910 1
#15

S
J3II5
840320
1345 1
1 1 117174 1
#16

S
J3I 16
840320
1355 1
1 1 137000 Ml
#17

S
J3117
840320
1410 1
1 1 11355000 1
#18

S
J3118
840320
1420 1
1 1 153900 1
#19

S
J3119
840320
1430 1
1 1 158440 1
#20

S
J3I20
840320
1445 1
1 1 1121800 1
#22

S
J3I22
840320
1515 1
1 1 1423500 1
#24

S
J3I24
840320
1530 1
1 1 1 5100 Ml
#25

S
J3I25
840320
1545 1
1 1 1 5500 Ml
#31
OFF LEFT BUSH
S
12181
840321
0810 1
1 1 1 1400 1
#31
OFF LEFT BUSH
w
12182
840321
0810 1
1 1 15 1
#32
NEAR CONCRETE BLOCK
S
12183
840321
0820 1
1 1 118300 1
#32
NEAR CONCRETE BLOCK
W
12184
840321
0820 1
1 1 1 23 1
#33
MIDWAY BLOCK & PIER
S
12185
840321
0840 1
1 1 1 4000 1
#33
MIDWAY BLOCK & PIER
w
12186
840321
0840 1
1 1 1 100 1

-------
ORGANIC ANALYSES
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
LAKE UNION SEDIMENT SURVEY	ANALYSES: MEED COMPUCHEM
SEATTLE, WASHINGTON	UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)









BASE / NEUTRALS









BIS












2-ETHYL
BENZYL
Dl-N-
Dl-N-
BENZO A

BENZO B

STA
WELL

OTR

HEXYL
BUTYL
BUTYL
OCTYL D1 ETHYL D1METHYL
ANTHRA
BENZO A
FLUORAN
STATION DESCRIPTION
NUM
DEPTH
M NUM
DATE
TIME PHTHALAT
PHTHALAT
PHTHALAT
PHTHALAT PHTHALAT PHTHALAT
CENE
PYRENE
THENE
#01


S
J3I0I
840320
0808


1 1 1
6200 Ml

1
#02


S
J3I02
840320
0830


1 1 1
42000 M


#03


S
J3I03
840320
0845


1 1 1
144120


#04


s
J3I04
840320
0900


1 1 1
5000 M


#05


s
J3I05
840320
0913 2500M


1 1 1
126800
177520
209220 I
#06


s
J3I06
840320
0925


1 1 1
757201
132510
473250 1
#07


s
J3I07
840320
0938


1 1 1
11000 M


#08


s
J3I08
840320
0955 20240


1 1 1
262200
1 70200
322000 1
#09


s
J3I09
840320
1030


1 1 1
313500
444600
1311000 1
#10


s
J3I 10
840320
1045


1 1 1
56936
77640
I0400MI
#11


s
J3II 1
840320
1120


1 1 1
569400
876000
1007400 1
#12


s
J3II2
840320
1135


1 1 1
706800
706800
765700 1
#13


s
J3II3
840320
1325


1 1 1
9198
12348
15120 1
#14


s
J3II4
840320
1340


1 1 1
1024200
796600
2105300 1
#15


s
J3II5
840320
1345


114404 1 1
60940
25484
37672 1
#16


s
J3116
840320
1355


137000 Ml 1
37000 M


#17


s
J3II7
840320
1410 4390200


1 1 1
8672000
14092000
8672000 1
#18


s
J3118
840320
1420 45276
19943
118580
1 122638 1
188650

24794 1
#19


s
J3II9
840320
1430


1 1 1
287330
433430
394470 1
#20


s
J3I20
840320
1445


1 1 1
913500
1035300
913500 1
#21


s
J3I2I
840320
1455


1 1 1
790800
200000 M
200000MI
#22


s
J3I22
840320
1515


1 1 1
169400
238700
169400 1
#23


s
J3I23
840320
1525


1 1 1
5100 M
10200 M

#24


s
J3I24
840320
1530


1 1 1
114300
146050
114300 1
#25


s
J3I25
840320
1545


1 1 1
5500 M


#26


s
J3I26
840320
1555


1 1 1
3100 M


#27


s
J3I27
840320
1600


1 3724 1 1



#28


s
J3I28
840320
1612


1 3700 Ml 1



#29


s
J3I29
840320
1620


132065 1 1



#30


s
J3I30
840320
1630


1 1 1
7348
2600 M

#31 OFF LEFT BUSH


s
12181
840321
0810


1 1 1
2100
760

#31 OFF LEFT BUSH


w
12182
840321
0810


1 1 1
7.9
5.6

#32 NEAR CONCRETE BLOCK


s
12183
840321
0820


1 1 1
2200
1200

#32 NEAR CONCRETE BLOCK


w
121 b4
840321
0820


1 1 1
7.6


#33 MIDWAY BLOCK & PIER


s
12185
840321
0840


1 1 1
12000
22000

#33 MIDWAY BLOCK 4 PIER


w
12186
840321
0840


1 1 1
210
270

TRANSPORT BLANK


s
J3I34
840321



1 760 1 1



TRANSPORT BLANK



12187
840321
64

13
1 .7 1 1




-------
ORGANIC ANALYSES
M COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
LAKE UNION SEDIMENT SURVEY	ANALYSES: MEED COMPUCHEM
SEATTLE, WASHINGTON	UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
	BASE / NEUTRALS	
BENZO K	BENZO	DIBENZO INDENO
STA WELL OTR	FLUORAN	ACENAPH ANTHRA GHI	PHENAN A,H ANTH 1,2,3-CD
STATION DESCRIPTION
NUM DEPTH M NUM
DATE
TIME
THENE
CHRYSENE
THYLENE CENE
PERYLENE
FLUORENE
THRENE
RACENE
PYRENE
#01
S
J3I0I
840320
0808

6200 M

1




1 1
#02
S
J3I02
840320
0830

42000 M

142000 M


42000 M

1 1
#03
S
J3I03
840320
0845



1


278520

1 1
#04
S
J3I04
840320
0900

5000 M
5000
Ml 5000 M


40430

1 1
#05
S
J3I05
840320
0913
126800

34870
169740
177900
38040
221900
41210
1 145820 1
#06
S
J3I06
840320
0925
473250
100960
5000
Ml 50480

31550
164060

1 1
#07
S
J3I07
840320
0938



1


11000 M

1 1
#08
S
J3I08
840320
0955
354200
285200
42320
173600
303600
16100
19320
59800
1 262200 1
#09
S
J3I09
840320
1030
1311000
290700
49590
179800
684000

165300

1 547200 1
#10
S
J3II0
840320
1045
I0400M
18116

1 5200 M


71170

1 84110 1
#11
S
J3III
840320
1 120
1007400
657000

1398580
963600

963600

1 I40000MI
#12
s
J3112
840320
1 135
765700
535990
52421
1318060
883500
38874
824600

1 559550 1
#13
s
J3II3
840320
1325
15120
8190
1000
Ml 10602
1386 M
1000 M
7308

1 8820MI
#14
s
J3114
840320
1340
2105300
1251800
23000
Ml 853500
910400
352780
3812300

1 967300 1
#15
s
J3II5
840320
1345
55400
72020
2200
Ml

2200 M
42658

1 72028 1
#16
s
J3116
840320
1355



137000 M


235320

1 1
#17
s
J3117
840320
1410
9214000
7588000
130000
Ml 5365800
9756000
2276400
18970000

1157180001
#18
s
J3I 18
840320
1420
258720
379400
59620
1156310

64680
495880

1 1
#19
s
J3II9
840320
1430
253240
243500
39447
187660
214280
36038
272720

1 199670 1
#20
s
J3I20
840320
1445
669900
913500
66990
1578550
475070
188790
1583400
140070
1 444570 1
#21
s
J3I2I
840320
1455

988500

1724900
200000 M

2833700

1 200000MI
#22
s
J3I22
840320
1515
154000
223300
50820
1154000
215600
6000 M
554400

1 130900 1
#23
s
J3I23
840320
1525

38125

1


5100 M

1 1
#24
s
J3I24
8403*0
1530
101600
152400

1 5100 M
133350

48895

1 120650 1
#25
s
J3I25
840320
1545

5500 M

1




1 1
#26
s
J3I26
840320
1555

3100 M

1


3100 M

1 1
#28
s
J3I28
840320
1612

1480 M

1




1 1
#29
s
J3I29
840320
1620



1


2300 M

1 1
#30
s
J3I30
840320
1630

7014

1


1300 M

1 1
#31 OFF LEFT BUSH
s
12181
840321
0810

2700
130
1 290
2000
98
3200
1500
1 1800 1
#31 OFF LEFT BUSH
w
12182
840321
0810

14

7 1 1.3
9.5
.3
8.6
45
1 12 1
#32 NEAR CONCRETE BLOCK
s
12183
840321
0820

7900

1
1800
480
2800

1 1500 1
#32 NEAR CONCRETE BLOCK
w
12184
840321
0820

14

8 1 3.4


8.3

1 1
#33 MIDWAY BLOCK & PIER
s
12185
840321
0840

18000
850
1 5400
18000
510
18000
8900
1 13000 1
#33 MIDWAY BLOCK & PIER
w
12186
840321
0840

410
33
1 190
290
24
600

1 200 1

-------
ORGANIC ANALYSES
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON
STA WELL OTR
STATION DESCRIPTION NUM DEPTH M NUM DATE TIME PYRENE
#01
S
J3I0I
840320
0808
169400
#02
S
J3I02
840320
0830
327600
#03
S
J3I03
840320
0845
416936
#04
S
J3I04
840320
0900
74640
#05
S
J3I05
840320
0913
494520
#06
S
J3I06
840320
0925
31550
#07
S
J3I07
840320
0938
265640
#08
S
J3I08
840320
0955
966000
#09
S
J3I09
840320
1030
1140000
#10
S
J3110
840320
1045
207040
#1 1
S
J3III
840320
1120
2496600
#12
S
J3112
840320
1 135
1825900
#13
S
J3113
840320
1325
28980
#14
S
J3II4
840320
1340
4039900
#15
S
J3115
840320
1345
12742
#16
S
J3116
840320
1355
413400
#17
S
J3I 17
840320
1410
34688000
#18
S
J3118
840320
1420
1185800
#19
S
J3I 19
840320
1430
827900
#20
s
J3I20
840320
1445
2618700
#21
s
J3I2I
840320
1455
3558600
#22
s
J3I22
840320
1515
600600
#23
s
J3I23
840320
1525
93750
#24
s
J3I24
840320
1530
450850
#25
s
J3I25
840320
1545
61936
#26
s
J3I26
840320
1555
27477
#28
s
J3I28
840320
1612
8510
#29
s
J3I29
840320
1620
14575
#30
s
J3I30
840320
1630
23046
#31 OFF LEFT BUSH
s
12181
840321
0810
4900
#31 OFF LEFT BUSH
w
12182
840321
0810
27
#32 NEAR CONCRETE BLOCK
s
12183
840321
0820
11000
#32 NEAR CONCRETE BLOCK
w
12184
840321
0820
22
#33 MIDWAY BLOCK & PIER
s
12185
840321
0840
40000
#33 MIDWAY BLOCK & PIER
w
12186
840321
0840
390
ANALYSES: MEED COMPUCHEM
UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
	BASE / NEUTRALS	
BENZO(A)ANTHRACENE/ BENZO(B)FLUORANTHENE/ ANTHRACENE/
CHRYSENE	BENZO(K)FLUORANTHENE PHENANTHRENE
2000
13
2900
II
13000
220

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ORGANIC ANALYSES
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON
COMPOUND PRESENT BUT BELOW THE MINIMUM QUANTIFIABLE LIMIT
ANALYSES: MEED COMPUCHEM
UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
STATION DESCRIPTION
STA WELL OTR
NUM DEPTH M NUM
DATE
ACRYLO
TIME ACROLEIN NITRILE
BENZENE
	VOLATILES	
CARBON	1,2- 1,1,1- 1,1- 1,1,2-
TETRA CHLORO DICHLORO TRICHLOR DICHLORO TRICHLOR
CHLORIDE BENZENE ETHANE ETHANE ETHANE ETHANE
#02
S J3I02
840320 0830
II196 1 1
1 1 1
#03
S J3I03
840320 0845
1 1 1
1 11367 1
#05
S J3I05
840320 0913
123458 1 1
1 1 25.75MI
#22
S J3I22
840320 1515
1 18.5 Ml 1
1 1 1
#25
S J3I25
840320 1545
1 1 1
1 1 114 1
#30
S J3I30
840320 1630
1 1 1
1 1 7.8 Ml
#32 NEAR CONCRETE BLOCK
S 12183
840321 0820
1 140 Ml I
1 1 1
#33 MIDWAY BLOCK & PIER
S 12185
840321 0840
1 2.3 Ml 1
1 1 1

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ORGANIC ANALYSES
LAKE UNION SEDIMENT SURVEY
SEATTLE, WASHINGTON
COMPOUND PRESENT BUT BELOW THE MINIMUM-QUANTIFIABLE LIMIT
ANALYSES: MEED CCMPUCHEM
UNITS: SEDIMENT UG/KG (PPB) DRY WEIGHT BASIS
WATER (UG/L (PPB)
STATION DESCRIPTION
STA WELL OTR
NUM DEPTH M NUM
DATE
ETHYL
TIME BENZENE
METHYL
LENE CHLORO BROMO
CHLORIDE METHANE METHANE
VOLAT I LES	
BROMO FLUORO DICHLORO CHLORO
BROMO DICHLORO TRICHLOR DIFLUORO DIBROMO
FORM METHANE METHANE METHANE METHANE
#01
S
J3I0I
840320
0808

1 I9.25MI I I
1 1

#02
S
J3I02
840320
0830
26
Ml
1 1 1
1 1

#04
S
J3I04
840320
0900

1 1244
1 1 1
1 1

#05
S
J3I05
840320
0913
621
1
1 1 1
1 1

#07
S
J3I07
840320
0938

13664
1 1 1
1 1 22.75
Ml
#08
S
J3I08
840320
0955

1 83
1 1 1
1 1

#09
S
J3I09
840320
1030

1 I4.25MI I 1
1 1 14.25
Ml
#10
S
J3II0
840320
1045

1 1035
1 1 1
1 1 15.3
Ml
#11
S
J3III
840320
1120

1 52.6
1 1 1
1 1

#13
S
J3II3
840320
1325

1 3
Ml I 1
1 1

#14
S
J3II4
840320
1340

1 159
1 1 1
1 1 14
Ml
#15
S
J3115
840320
1345

1 13
Ml I 1
1 1

# 16
S
J3116
840320
1355

1 51
1 1 1
1 1 8
Ml
#17
S
J3117
840320
1410

13957
1 1 1
1 1

#18
S
J3118
840320
1420

11132
1 1 1
1 1

#19
S
J3II9
840320
1430

1 1023
1 1 1
1 1 12
Ml
#20
S
J3I20
840320
1445

11035
1 1 1
1 1

#21
S
J3I2I
840320
1455

1 507
1 1 1


#22
s
J3I22
840320
1515
454
11155
1 1 1
1 1

#23
s
J3I23
840320
1525

115360
1 1 1
1 1

#24
s
J3I24
840320
1530

1 15
Ml I I
1 1

#25
s
J3I25
840320
1545

1 15.8
Ml 1 1
1 1158

#26
s
J3I26
840320
1555

1 57
1 1 1
1 1

#27
s
J3I27
840320
1600

1 193.0
1 1 1
1 1

#28
s
J3I28
840320
1612

1 99.9
1 1 1
1 1

#29
s
J3I29
840320
1620

1 187
1 1 1
1 1

#30
s
J3I30
840320
1630

1 127
1 1 1
1 1 7.8
Ml
TRANSPORT BLANK
s
J3I34
840321


12300
1 1 1
1 1 2.5
Ml
	VOLAT I LES	
TETRA
STA WELL OTR	CHLORO	TRICHLOR VINYL
STATION DESCRIPTION NUM DEPTH M NUM DATE TIME ETHENE TOLUENE ETHENE CHLORIDE
#22	S J3I22 840320 1515	I 18.5 Ml	I	I

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APPENDIX C
DEPTH, PERCENT SOLIDS, SEDIMENT DESCRIPTION

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Illff lUTftl
SEDITCNT INVESTIGATION
Station

Depth
Number
% Solids
(Feet)
1
14
35
2
19
20
3
11
35
4
16
39
5
16
20
6
16
37
7
11
43
8
22
10
9
18
14
10
16
39
11
23
15
12
17
32
13
79
15
14
18
35
15
18
41
16
31
15
17
18
31
18
19
39
19
21
29
20
16
38
21
15
39
22
13
33
23
16
39
24
16
40
25
16
35
26
26
25
27
38
36
28
27
32
29
17
33
30
30
43
Saiple Description
Oily
Soft nud
Soft mud, seme oil
Soft sediment, heavy oil
Soft, oily
Brown sediment, no oil
Normal sediment
Sane oil, had grey streaks
Consistency of jello, had oil and
gr^y streaks, smelled of oil
Consistency of jello, some oil
Sane gravel, fairly soft, rood
chips, oil sheen
Consistency of jello, brown
sediment over black oily material
Very fine, sane oil
Fine, sane oil, sane sticks
Fine, sane oil
Fine, brown with oil
Fine, black, sane brown, oily
Sliny, gr^y, black, oily
Fine, black, sane oil

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APPENDIX D
PERMITS FOR DREDGING AND OTHER ACTIVITIES OFF SOUTH SHORE OF
GAS WORKS PARK

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(y~as
SEATTLE
1 5 O 7 FOURTH AVENUE
TELEPHONE MAin 1767
C4»sa
SEATTLE 11. WASHINGTON
May 1, 1953
U. S. Army District Engineers Office
^735 E. Marginal Way
Seattle Washington
Attention: Mr. Pagett
Gentlemen:
We request a permit for dredging a barge docking
area on the South shore of the Seattle Gas Company's manu-
facturing plant in Lake Union, as indicated on the enclosed
plan. The proposed dredging vill he at two depths, 10 ft.
and 15 ft. helow mean low water and will require removal of
approximately ^300 cu. yds. This will he deposited either
at a point $00 yds. east of Webster Point in Lake Washington;
or at a point 5°0 yds. west of the buoy marking the entrance
to Shilshole Bay in Puget Sound. The General Construction
Company of Seattle is being requested to handle the work.
A similar dredging operation was completed in this
same general area in 19^3.
Very truly yours,
^Hf. c,	—
M. C. McCallun.
Design & Construction Eng.
SEATTLE GAS COMPANY
End.
so1

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MORCM MFUT TO
MSTMICT MaiMM
•CATTlt OltTKieT
con** or maiMiui
«m (. HUtlNU WAY
Html 4. ¦MMHtOTON
MFCR TO FIU HO. BPSS3 800,6(Laka
Union, Iaan,)62/3
DEPARTMENT OF THE ARMY
CORPS OF ENGINEERS
OFFICE OF THE DISTRICT ENGINEER
SEATTLE DISTRICT
4735 E. MARGINAU-WAY
SEATTLE 4. WASHINGTON
JBP/l
aa
7 19^3
Seattle Gas Company
1507 Fourth Avenue
8eattle 11, Washington
Oentlement
Attention! ICr. II. C. UcCallu^ Design and Construction Eng.
Ih accordance *ri.th your application of 1 nay 1953
inclosed is Department of the Amy permit to dredge approximately U300 cubic yards
of material in Lake Union, and deposit at specified locations in either Lake Wash-
ington or entrance to Shilshale Bay*
Sections 9 and 10 of the River and Harbor Act of 3 Harch 1599 make
it unlawful to build or to commence to build any structure across or in
any navigable "rater of the United States and/or to excavate, or fill, or
in any marker to alter or to modify the course of such navigable water
except on plans that have had the prior approval of the Chief of Engineers
and the- Secretary of the Amy.
You are hereby informed that if the structure built or the work done
is not in accordance with the plans attached to this permit, such struc-
ture or work is consequently illegal and this fact may impair sale or
security value and may place you at a disadvantage in suits for damages
on account of collision cr other accidents. Completed work that departs
materially in locations or.otherwise frcm approved plans can be legalized
only by special act of Congress.
jfeu are therefore cautioned that if any material changes in the
location or plans of the proposed structure or work are found necessary
on account of unforeseen or altered conditions or otherwise, revised plans
should be submitted promptly to this office to the end that, if fcund un-
objectionable from the standpoint of navigation, they may receive the
approval required by law before construction thereon is begun.
It is requested that this office be notified when this work is
coi.r.ienced, and immediately after it is completed.
FOR THE DISTRICT ENGINEER j
Very truly yours,
1 Incl
Perr.it
K. F. SMRHA
Chief, Operations Division

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,10.
JEPARTMENT OF THE ARM
Note.—It is to be understood that this instrument does not give any property rights either in real estate or mate-
rial, or any exclusive privileges; and that it does not authorize any injury to private property or invasion of private
rights, or any infringement of Federal, State, or local laws or regulations, nor does it obviate the necessity of obtaining
State assent to the work authorized. It merely expresses the assent of the Federal Government so fas as con-
cerns the PUBLIC RIGHTS OF navigation. (See Cummings v. Chicago, 188 U. S., 410.)	u-mm**
PERMIT
Seattle District, Corps of Engineers.
Seattle, Washington
			-7-May -. 19 53 •
HF5KS 800.6(Lake Union,
Wash.) 62/2
Seattle Gas Company
1007 Fourth Avenue
Seattle 11, Washington
Gentlemen:
Referring to written request dated 	 ^ jjay 19^3
I have to inform you that, upon the recommendation of the Chief of Engineers,
and under the provisions of Section 10 of the Act of Congress approved March 3,
1899, entitled "An act making appropriations for the construction, repair, and
preservation of certain public works on rivers and harbors, and for other pur-
poses," you are hereby authorized by the Secretary of the Army.
to dredge approximately l3$ercgbi£dredged material to be deposited
either at a point $00 yards east of Webster Point in Lake Washington or at a
point 500 yards west of the buoy Barking the entrance to Shilshole Bay in Paget
Paget Sound) at two depths, 10' and 15' below mean low water)
in Union 	
(Here to be named the river, harbor, or waterway concerned.)
at the south shore of the Seattle Gas Company' b manufacturing plant. Seattle
(Here to be named the nearest well-known locality—preferably a town or Sty—and the distance in milea and tenths from 			 noint in
the same, stating whether above or below op giving direction by points of r
in accordance with the plans shown on the drawing attached hereto and marked*
(Or drawings; give file number or other definite identification marks.)
"Proposed Dredging in Lake Union at Seattle Gas Co Lake Union Plant County oft
King Statei Washington Application byi Seattle Gas Co 1507 iith Ave. Seattle
BaSet U-30-53*	 		—
subject to the following conditions*
EUTtRED ON CARD
®=50Rp OF FESMIT3

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(0)	That the work shall be jject to the supervision and approval of the l).~ ict Engineer, Corps of Engineers,
in charge of the locality, who may temporarily suspend the work at any time, if in his judgment the interests of navi-
gation so require.
(6) That any material dredged in the prosecution of the work herein authorized shall be removed evenly and no
large refuse piles, ridges across the bed of the waterway, or deep holes that may have a tendency to cause injury to
navigable channels or to the banks of the waterway shall be left. If any pipe, wire, or cable hereby authorized is laid
in a trench, the formation of permanent ridges across the bed of the waterway shall be avoided and the back filling
shall be so done as not to increase the cost of future dredging for navigation. Any material to be deposited or
dumped under this authorization, either in the waterway or on shore above high-water mark, shall be deposited or
dumped at the locality shown on the drawing hereto attached, and, if so prescribed thereon, within or behind a good
and substantial bulkhead or bulkheads, such as will prevent escape of the material in the waterway. If the mate-
rial is to be deposited in the harbor of New York, or in its adjacent or~tributary waters, or in Long Island Sound, a
permit therefor must be previously obtained from the Supervisor of New York Harbor, Whitehall Building, New
York City.
(c)	That there shall be no unreasonable interference with navigation by the work herein authorized.
(d)	That if inspections or any other operations by the United States are necessary in the interest of navigation,
all expenses connected therewith shall be borne by the permittee.
(e)	That no attempt shall be made by the permittee or the owner to forbid the full and free use by the public of
all navigable waters at or adjacent to the work or structure.
(/) That if future operations by the United States require an alteration in the position of the structure or work
herein authorized, or if, in the opinion of the Secretary of the Army, it shall cause unreasonable obstruction to the free
navigation of said water, the owner will be required upon due notice from the Secretary of the Army, to remove or
alter the structural work or obstructions caused thereby without expense to the United States, so as to render naviga-
tion reasonably free, easy, and unobstructed; and if, upon the expiration or revocation of this permit, the structure,
fill, excavation, or other modification of the watercourse hereby authorized shall not be completed, the owners shall,
without expense to the United States, and to such extent and in such time and manner a3 the Secretary of the Army
may require, remove all or any portion of the uncompleted structure or fill and restore to it3 former condition the navi-
gable capacity of the watercourse. No claim shall be made against the United States on account of any such removal
or alteration.
(g)	That the United States shall in no case be liable for any damage or injury to the structure or work herein
authorized which may be caused by or result from future operations undertaken by the Government for the conserva-
tion or improvement of navigation, or for other purposes, and no claim or right to compensation shall accrue from
any such damage.
(h)	That if the display of lights and signals on any work hereby authorized is not otherwise provided for by law,
such lights and signals as may be prescribed by the U. S. Coast Guard, shall be installed and maintained by and at the
expense of the owner.
(1)	That the permittee shall notify the said district engineer at what time the work will be commenced, and as
far in advance of the time of commencement as the said district engineer may specify, and shall also notify him
promptly, in writing, of the commencement of work, suspension of work, if for a period of more than one week,
resumption of work, and its completion.
(j) That if the structure or work herein authorized is not completed on or before~	:i~„	day
of	Itecemfcer.	, 195.6.,
this permit, if not previously revoked or specifically extended, shall cease and
be null and void.
By authority of the Secretary of the Army:

H. A. MATTHIAS
Colonel, Corps of Engineers
no form 1701 m\	District Engineer
f SEP 48 l/*£l wlVily This form supersedes ED Form dated 1 Apr 48, which may be osed antfl exhausted.
t. •. oovamiuT raivrtna orrics

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'mm,
$S&
MoRTHLA^C
Q
'uY/ii/.

^ouxHEAt) $ pierhead uvje.
Wttrt VOACTER uwe
%...
© O -fflj»ejvi rus
EJ g
TR/XcED b5?om
-LAKE. LMOVt MAR3QR UUES
as;.AS?V!y ENE G>ON/T. LOCKS: VUL.W.L,
MoTE'.
HTlTViELR of T*)o tai-MoV^u
AR.ETAS *	BE.
|. Wl'LKKE: WSUiNGTovJ 500fOS.
S^ST OF VWEB'STE^ FT-
2. OPF SvUUSVlOLS, EAY
5boso> WEST OF 600^
V1ARK.UJG CHANEL ENTRAJOCE.
PREPG1MG PLANl
%cw-e. v \"« too*
PROPOSED O^eOGiVOG
U\KE UMlONl
AT SETTLE GAS Co U\XJL UsjiflH PiMiJ
Counts oFt K)>0<3 Sufis:
i *• a.Ti r»\.\ er>wi f ^e* A"T,-r*» ts f? ~ ~ f -.

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A
\p

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652.43/13-
WAR DEPARTMENT
Note.—It is to be understood that this instrument does not give any property rights either in real estate or material,
or any exclusive privileges; and that it does not authorize any injury to private property or invasion of private rights, or
any infringement of Federal, State, or local laws or regulations, nor does it obviate the necessity of obtaining Slate assent
to the work authorized. It iierelv expresses the assent of the Federal Goveb'nment so far as conceeks the pcb-
lic bights of NAVIGATION. (See Cumminga v. Chicago, 188 U. S., 410.)	«-«oo
PERMIT
532(Lake Union}2.3	V.n^itd.-St^3 l^ineer Office.
liortb 1'acific Luvi&ion,
PjOJ^laad».Q?_eCjL__Q«;&».JI5, 19 37 .
Seattle Gas Company,
1511 Fourth Avenue,
Seattle, i^ashinston*
Referring to written request dated Cecesbor 7, 1937f
have to inform you that, upon the recommendation of the Chief of Engineers,
and under the provisions of Section 10 of the Act of Congress approved March 3,
1899, entitled "An act making appropriations for the construction, repair, and
preservation of certain public works on rivers and harbors, and for other pur-
poses," you are hereby authorized by the Secretary of War,
to construct four lS-pila dolnhlns
(Here describe the proposed structure or work.)
in leJco Union, gnsMngtoa
(Here to be named the river, harbor, or waterway concerned.)
£7^cattla, eashiagtoa,
(Here to be named the nearest well-known locality—preferably a town or city—and the distance in miles and tooths from some
stating whether above or below or giving direction by points
the same.
accordance with the plans shown on the drawing attached hereto	"Proposed
(Or drawings; give file number or other definite identification marks.)
Dolphins in Lake Union, Cash* Afrpllaation by; Seattle Gas Co., Deccnber 7th, 1537,'
Sheets 1 and 2,
subject to thefollowing conditions:
LHifim o;t c-no
COMPI FTIflN P??nSTPn ™ r nc
	? ~ 2 C

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(a) That the work shall be subject to the supervision and approval of the District Engineer, fcingineer isepanuicu*
at Large, in charge of the locality, who may temporarily suspend the work at any time, if in his judgment, the interesta
of navigation bo require.
(5) That any material dredged in the prosecution of the work herein authorized shall be removed evenly, and no
large refuse piles, ridges across the bed of the waterway, or deep holes that may have a tendency to cause injury to navi-
gable channels or to the banks of the waterway shall be left. If any pipe, wire, or cable hereby authorized is laid in a
trench, the formation of permanent ridges across the bed of the waterway shall be avoided and the back filling shall be
so done as not to increase the cost of future dredging for navigation. Any material to be deposited or dumped under
this authorization, either in the waterway or on shore above high-water mark, shall be deposited or dumped at the local-
ity shown on the drawing hereto attached, and, if so prescribed thereon, within or behind a good and substantial bulk-
— head or bulkheads, such as will prevent escape of the material into the waterway. If the material is to be deposited in
the harbor of New York, or in its adjacent or tributary waters, or in Long Island Sound, a permit therefor must be pre-
viously obtained from the Supervisor of New York Harbor, Army Building, New York City.
(e) That there shall be no unreasonable interference with navigation by the work herein authorized.
(d)	That if inspections or any other operations by the United States are necessary in the interests of navigation, all
expenses connected therewith shall be borne by the permittee.
(e)	That no attempt shall be made by the permittee or the owner to forbid the full and free use by the public of all
navigable waters at or adjacent to the work or structure
(/) That if future operations by the United States require an alteration in the position of the structure or work
herein authorized, or if, in the opinion of the Secretary of War, it shall cause unreasonable obstruction to the free navi-
gation of said water, the owner will be required, upon due notice from the Secretary of War, to remove or alter the
structural work or obstructions caused thereby without expense to the United States, so aa to render navigation reason-
ably free, easy, and unobstructed; and if, upon the expiration or revocation of this permit, the structure, fill, excavation,
or other modification of the watercourse hereby authorized shall not be completed, the owners shall, without expense
to the United States, and to such extent and in such time and manner as the Secretary of War may require, remove
all or any portion of the uncompleted structure or fill and restore to its former condition the navigable capacity of the
watercourse. No claim shall be made^ against the United States on account of any such removal or alteration.
(g)	That the United States shall in no case* be liable for any damage or injury to the structure or work herein
authorized which may be caused tyv/ir-rpgiilt. fa?™ f"tllTf.nB undertaken by the Government for the conservation
or improvement of navigation,jLuol no claim or rigntTo compenssftion shall accrue from any such damage.
(h)	That if the display of lights and signals on any work hereby authorized is not otherwise provided for by law,
such lights and signals as may be prescribed by the Bureau of Lighthouses, Department of Commerce, shall be installed
and maintained by and at the expense of the owner.
(0 That the permittee shall notify the said district engineer at what time the work will be commenced, and as far
in advance of the time of commencement as the said district engineer may specify, and shall also notify him promptly, in
writing, of the commencement of work, suspension of work, if for a period of more than one week, resumption of work,
and its completion.
(j) That if the structure or work herein authorized is not completed on or before	day
of PaaarOMW	, 19.40..., this permit, if not previously revoked or specifically extended, shall cease and be null
and
By authority of the Secretary of War:
Xhotraa Bobiaa,
Colonel9 Corps of Saslaoars,
Division Soglaoer*
WAS DEPARTMENT
O. C. or£.
Form No. 96
Revised March IS, 1938
a—8360

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APPENDIX E
NOAA PUGET SOUND AREA SAMPLING SITES AND SUMMARY OF
COMPARISON DATA

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} CV^ v

8«Minonam
'A
B**m t*r
fort Stum
SN
Litftrry ity
Sintltf tmm
C*» inltt
Htmmtmr* Inirt'
fart Simmt
Point Jlftmon
tan m«mm
f. Cihatt 3*r
j ^ ^ ¦ fr		 lie
Taeoma
Olymoia
Autftf (MM
NCAA PUGET SOUND AREA SAMPLING SITES

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CCMPARI SON OF CONTAMINANT LEVELS AT SELECTED NOAA STATIONS
Parameter
Min
Case
Inlet ~
Max
Avg
Port
Madison +
Mln
Max
Avg
Mln
Budd
Inlet +
Max
Avg
Mln
Sinclair
Inlet ~
Max
Avg
Port
Susan ++
Mln
Max
Avg
Mln
01 scovery
Bay ++
Max
Avg
Chromium
beryl 11um
Copper
Nickel
Zinc
20.9
.160
10.2
19.4
23.2
52.7
.566
45.0
47.0
82.5
36.6
.374
27.6
33.2
52.8
22.8
.221
10.4
21.5
26.8
45.6
.490
25.8
42.0
61.9
34.2
.35
18.1
31.8
44.4
34.6
.433
36.6
34.8
55.1
50.1
.759
81.1
47.6
118
44.7
.625
62.7
42.4
91.4
39.4
.420
46.8
35.5
83.2
71.5
.633
184
5219
292
58.4
.55
128.4
47.0
192.3
Arsenic
Si Iver
Antimony
Selenium
Mercury
Cadmium
1.83
19.0
.024
3.16
2.26
46.0
28
.116
7.58
2.04
32.5
28
.071
5.37
1.48
17.8
.042
3.08
1.97
32.4
22
.113
6.25
1.72
25.1
22
.078
4.66
57
2.66
43.7
28
.125
8.19
140
3.67
68.6
74
.329
11.2
99
3.1
57.8
54
.246
.64
2.02
31.1
27
.315
5.24
4l 76
52.0
30
1.15
8.14
14
15
15
3.28
43.8
29
.89
7.06
29
.36
.860
.58
.907
.47
.860
2.6
.03
.39
2.6
Lead
Pyrene
FIuorene
Acenaphthy-
lene
7.93
8.0
.10
.10
23.9
90
1.0
.40
15.9
49
0.6
.25
10.
30
10
.10
20.1
100
.40
.10
15.2
70
5.2
.10
22.6
100
5.0
.20
60.1
180
9.0
.30
44
150
7.0
.23
44.2
190
4.0
.2
136
3100
90
3.0
100.7
1025
36
.9
21
22
22
Naphthalene
Fluoran-
thene
Acenapthene
Anthracene/
Phenanthrei
3.0
7.0
0.2
4.3
20
100
5.0
58
12
54
2.6
31.2
6.0
30
.10
23
30
80
3.0
70
19
55
1.6
46
30
80
9.0
50
60
160
10
110
53
123
9.7
83
40
ICO
6.0
90
360
2300
60
2180
132
600
31.5
710
Benzo (A)
Anthracene/
Chrysene
PtB - 1260
PCB - 1254
6.0
.15
.34
40
1.2
2.9
23
.67
1.6
40
.40
2.2
120
2.0
6.0
80
1.2
4.1
80
.90
4.3
200
6.0
17
137
4.2
II
260
13
16
3600
90
120
1252
70.8
68.5
+ Mai Ins et.al. Chemical Contaminants and Blologlca
++ Mai Ins et.al. Chemical Contaminants and Abnormal
Abnormalities In Central and Southern Puget Sound, NOAA Tech. Memo. CMPA-2
ties In Fish and Invertebrates from Puget Sound, NOAA Tech. Memo. 0MPA-I9

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APPENDIX F
RATIONAL FOR ADDITIONAL SAMPLING OF LAKE UNION

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Characterizing Total PNA's In Lake Union Sediments
Using Estimation Techniques
IntroductI on
The purpose of the March 20-20, 0984 Lake Union survey was to
determine the nature and extent of sediment contamination by priority
pollutants. Review of sediment data showed that certain hydrocarbons,
particularly polynuciear aromatics (PNA's) were at levels which could
endanger human health. In an effort to determine the magnitude of the
problem, the analysis of data focused upon the levels of total PNA's In
the sediments.
The objective of the analysis was twofold. The first was to estimate
the distribution of PNA's, using the data obtained during the March 20-20,
0984 study. Estimates of the areal distribution are needed to assess the
risks associated with existing conditions, as well as to evaluate the need
for remedial action. The second objective of the analysis was to
determine If the available data provided an adequate description of PNA
levels and, if not, what additional measurements would have to be made to
accompI Ish this.
The data analysis was performed using a method known as kriging.
Kriging Is an estimation technique (Matheron, 0970) which models a
particular process as a spatial random function. The random function Is
assumed to Include a slowly varying deterministic component and a rapidly
varying random component. The slowly varying deterministic component Is
that which can be characterized by specific relationships such as those
obtained from known physical, chemical or biological laws. The random
protion Is associated with measurement error and natural variability which
cannot be described with simple, functional relationships.
In the case of Lake Union, the process Is that which resulted in the
distribution of total PNA's In the sediments. A specific, but at this
point unknown, amount of material was dumped In or near the Lake during
the operation of the coal gasification plant. The distribution of the
material after It was dumped has been affected by many things, Including
wave action, river discharge, boating patterns and dredlng. The purpose
of applying estimation techniques Is to characterize the resulting
distribution In terms of Its deterministic portion and Its random
portion. This Information can be used to Interpolate between measured
values to obtain estimates of the areal distribution, as well as to
characterize the uncertainty associated with these estimates.
Furthermore, knowledge of the underlying process and the statistical
properties of the process can be used In conjunction with simulation
methods to evaluate the adequacy of monitoring programs. The analysis in
this appendix describes the application of kriging and simulation methods
to the analysis of total PNA's in Lake Union. Results presented include
the estimates of the areal distribution of PNA's and the variance of these
estimates. Recommendations for additional sampling are presented based
upon the kriging and simulation methods.
Estimation of Areal Distribution of Total PNA's
The areal- d I strI but I on of total PNA's In the sediments was estimated
from data collected at the stations shown in Figure F-0. These estimates
were obtained using a statistical technique called kriging. Kriging
estimates the values at unmeasured locations as a weighted, linear
function of nearby measured values. The weighting relationships are

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determined from two statistical critera, unblasedness and minimum variance
of the estimates. In addition to providing estimates of the values at
unmeasured locations, krlglng provides estimates of the variance of the
est I mates.
Hughes and Lettenmaier (0982) have developed software which estimates
the parameters for krlglng. They assume that the data are realizations of
a process which Includes a slowly varying deterministic part and rapidly
varying random component with a mean of zero. Their analysis considers
processes for which the deterministic portion Is a polynomial function of
distance between points, only. Furthermore, the polynomials are
restricted to those of order 0, 0, or 2. The generalized covariance,
which describes the uncertainty as a function of distance between points,
is restricted to polynomials with powers of 0,0,3,or 5, only, depending
upon the nature of the deterministic component. That both the
deterministic and random components are functions of the distance between
points means. In addition, that the processes evaluated by the method have
been assumed to be Isotropic.
The software developed by Hughes and Lettenmaier (0982) comprises
three step. In the first step, the data are used to Identify the order of
the deterministic model. The model Identified in the first step is used
in the second step to estimate the functional form of the generalized
covariance. The two are combined In the third step to Interpolate the
data points.
The total PNA data from Lake Union sediments were first transformed
by taking the logarithm of each measured value. The log-transformed data
were then analyzed using the method of Hughes and Lettenmaier (0982). The
number of neighboring measured points used to krige the unmeasured
locations was chosen to be ten. In the model identification process, a
second-order polynomial was found to provide the best fit. The parameter
estimation step led to the choice of a zero-order polynomial as the best
description for the generalized covariance. This corresponds to the case
In which the uncertainty at any location Is Independent of that at any
other location. This can be a result of measurement error or of processes
which have a scale smaller than that of the sampling grid. The resulting
contours of total PNA's are shown In Figure F-3.
The contours of total PNA's estimated with the krlglng method of
Hughes and Lettenmaier (0982) (Figure F-3) shows a region of high
concentration to the southwest of the park. The peak Is located in the
region where waste products from the gasification process were
historically dumped. The shape of the contours and the identification of
the deterministic model as a second-order polynomial suggest that a
dIffus I on-1 Ike process has resulted In the migration of PNA's from the
dump site to surrounding sediments.

-------
Evaluation of Adequacy of Monitoring Program
The results of the analysis, described above, were used to evaluate
the need for additional measurements. This was done by first generating
synthetic data with a process simulating that of the conditions Inferred
from the Lake Union data. The process, based upon the results of krlging,
was chosen to be one with a deterministic component characterized by a
second-order polynomial In log-transformed space. This correpsonds to a
normal distribution in untransformed space, which can be shown to be a
solution to the time-dependent diffusion equation for which the horizontal
diffusion Is Isotropic. The selection of the generalized covarlance as a
zero-order model follows from the parameter estimation stage and was
implemented by simply adding a normally and Independently distributed
random variable to each simulated value. The standard deviation of the
log-transformed data was determined from the residual of the
least-squares, second-order polynomial fit to the observed values (Figure
F-4). The equation used to generate the synthetic values was:
In	P = 8.825 - 0.824*00~6*r2 + v(r)	(0)
where,
P =	total PNA concentration, ppm,
r =	distance from source, feet,
v(r) =	normal and Independently distributed random variable,
N(0, # 2).
= the standard deviation of the noise In log-space.
In untransformed space, Equation (0) Is:
P = 6800.*ev(r)*e"°*5*(r/524')#*2	(2)
Apart from the random component, Equation (2) Is a solution to the time-
dependent, two-dimensional diffusion equation when a finite quantity of
material is discharged over a very short period of time at r=0 and time
t=0.
Data generated with the model of Equation (0) were sampled using the
nine different sampling station designs shown In Figure F-5. The designs
Included three different frequencies of angular sampling and three
different frequencies of radial sampling. The distance between circles,
r, was also varied, as was the variance,<1 ,of noise In the simulated
values. 50 simulations were performed for each scenario to obtain a
reasonable sample of the population. The results. In terms of the number
times a particular sample design resulted In the choice of a given model,
using the Hughes and Lettenmaler algorithm, are given In Tables F-0 and
F-2. For the data generated with Equation (0) the correct choice, In
Iog-transformed space. Is the model with a second-order polynomial. The
value of each monitoring design can then be evaluated In terms of the
number of times the data sampled by the design leads to the correct choice.
For the nine sampling station designs which were evaluated, the best
results obtained when the radial coverage was at least four standard
deviation of the underlying deterministic process. The ability of krlging

-------
to Identify the correct model was found to be erratic when the angular
spacing was 90 . Performance was much better when the angular frequency
was Increased to a station spacing of 60 . This appears to be related to
the fact that krlglng works best when there Is a reasonably uniform
distribution of sample stations In the neighborhood of the krlged point.
When the angular spacing Is 90 , this Is certainly not true, except at,
or near, the center of the grid. The minimum sample design needed to
obtain a high degree of reliability Is the one for which the angular
spacing Is 60 , the radial spacing Is approximately one standard
deviation of the underlying deterministic process and four standard
deviations of the underlying process are spanned.
The above analysis Is based upon the assumption that both the
deterministic and random processes are Isotropic. Furthermore, It assumes
that the diffusion process Is taking place In a uniform medium of Infinite
extent. It Is apparent from the countoured data (Figures F-2 and F-3)
that this Is not the case. A multiple regressslon of the data on
x(East-West) and y(North-South), for example, leads to the relationship:
In P = 8.838 - 0.457*00"6*x2 - 3.743«00~6*y2	(3)
In untransformed space this corresponds to:
P = 6900.*e*°«5#I(x/585»>**2+Cy/364.)**2]	(4)
Equation (4) is also the solution to the time-dependent diffusion
equation. In this case, however, the diffusion process Is anisotropic,
with a larger rate of diffusion along the x-axIs than along the y-axls.
The standard deviation along the x-axIs Is 585 feet and along the y-axls
Is 364 feet.

-------
Reducing uncertainty Is also an Important element of monitoring
design. Estimates of the variance provided by kriglng can be used for
this purpose. Contours of the estimated standard deviation of the
log-transformed total PNA data are shown In Figure F-7. Changes In the
estimated standard deviation, as a result of adding new stations, can be
made with the existing kriging scheme without any additional
measurements. Contours of estimated standard deviations obtained by
extending the sampling grid (Figure F-6) are shown In Figure F-8. The
greatest reduction In uncertainty occurs In those regions where there was
no station coverage, the southwest and southeast corners. Estimated
standard deviation resulting from expanding the measurement grid (Figure
F-9) Is shown In Figure F-00. The resulting Improvement In accuracy Is
small. The reason for this being that the model of the generalized
covariance was estimated from the data to be zero-order. For this model,
the uncertainty at any point Is Independent of that at any other point.
As a result, expanding the grid Is of little value. Improvement In
uncertainty could be obtained by taking replicates at each of the
stations. If the average value of the replicates at each station were
kriged, and If the uncertainty really was independent of station location,
then the standard deviations would decrease approximately In proportion to
the Inverse of the square root of the number of replicates. For
Iog-transformed data this can amount to substantial decrease In the actual
uncertainty, given a small number of replicates. For purposes of reducing
uncertainty then, the best strategy Is to take replicates at the existing
statIons.
Cone I us Ions
Although the results of the field studies show that the concentration
of total PNA's In Lake Union do not completely satisfy the assumptions
used In the model (Equation 0), the similarities reflected In the linear
regression (Equation (0)) and the model Identification process support
some quantitative conclusions regarding sample designs. These are:
0. Sample station spacing should be approximately one standard
deviation of the underlying deterministic process. One standard
deviation, inferred from regressing the sediment data on distance
between measurments Is 300 to 500 feet.
2.	Radial distribution of sampling design should span three to
four standard deviations of the underlying process.
3.	Angular distribution of sampling design should be such that
angular spacing Is less than 60
Analysis of the uncertainty (Figures F-7, F-8, and F-9) leads to the
conclusion that:
4. Variance In the average value can be reduced by collecting
replicates. The variance of the log-transformed data will be
reduced approximately In proportion to the Inverse of the number
of samples.

-------
Assuming that Station 07 (Figure F-0) Is the approximate location of
the source of PNA's, these criteria can be used to evaluate the existing
data and to suggest additional sampling strategies. The station spacing
In the original sample deslgen (Figure F-0), for example, is of the
correct order. To the east of Station 07, the radial distribution spans
more than enough distance to satisfy Criterion #2. Station coverage needs
to be extended to the south and west, however, to satisfy ail the
criteria. An additional ten to fifteen stations are necessary to
accomplish this. Figure F-00 is an appropriate sample design, in terms of
the three criteria given above, for the purpose of Identifying the true
under lying mode I.

-------
Table F-0. Number of times the Hughes and Lettenmaler chooses a model of
given order when the true process Is described by Equation (0)
with 0 = 0.0
Rad I a I
SpacIng
Mode I
Order
No.
90
of radial
I ncrements
Angular Spacing
60
No. of radial Increments
No.
45
of radI a I
I ncrements
0.067
0
0
2
3
42
8
0
5
36
04
0
7
34
06
0
3
29
20
0
5
42
6
2
7
32
05
3
3
30
08
2
5
34
05
0
7
33
06
0
0.333
0
0
2
09
30
0
44
6
0
05
33
2
5
25
20
00
00
30
42
7
3
04
03
23
5
00
35
0.667
0
0
2
47
2
0
5
0
44
48
0
2
5
39
6
2
2
46
0
0
50
6
42
2
0
0
48
0
0
49

-------
Table F-2. Number of times the Hughes and Lettenmafer chooses a model of
given order when the true process Is described by Equation (0)
with 0	= 2.0
R ad I a I
SpacIng
Model	90
Order	No. of radial
Increments
Angular Spacing
60
No. of radial Increments
45
No. of radial
I ncrements
0.067
0
0
2
3
42
8
0
5
40
9
0
7
38
02
0
3
24
25
0
5
43
6
0
7
40
8
2
3
35
04
0
5
40
9
0
7
37
03
0
0.333
47
3
0
30
09
0
23
27
0
42
8
0
38
02
0
24
26
0
42
7
0
00
35
5
5
25
20
0.667
0
0
2
47
3
0
7
07
26
38
7
5
40
9
0
02
03
25
0
3
46
08
30
2
07
07
06
3
8
39
0.000
0
0
2
38
0
0
0
0
49
49
0
O
4
38
8
0
0
49
0
0
50
0
38
02
0
0
49
0
0
50

-------
Bibliography
Akima, H. Method of bivariate interpolation. ACM Trans, on Math.
Software, Vol. 4, No. 2, 148-159, 1978.
Hughes, J.P. and D.P. Lettenmaier. Aquatic monitoring: Data analysis and
network design using regionalized variable theory, Univ. of
Washington, Dept. of Civil Eng. Charles W. Harris Hydraulics
Laboratory Report 65, Seattle, WA, 1980.

-------
/
«"Wtep	F-l.

-------
F-Z. LOG OF TOTAL PNA'S IN SEDIMENT OF LAKE UNION
1000. 0v
BOO. 0
600. 0
400. 0
124B. 0
15S0. 0
312. 0
624.0
936. 0
200. 0 ^ ! /
! i
conroua from
1.00 TO
a. 00 CONTOUR INTERVAL -
1.00

-------
Fx6«i**R.^"3. LDGAR.I THM OF TGiAL PNA'S IN
~r$iQi>0 •—

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-------
FIGURE F-H. MEASURED VALUES OF PNA'S IN LAKE UNION COMPARED
TO UALUES PREDICTED BV TWO-DIMENSIONAL DIFFUSION MODEL
7
6
DIFFUSION nOKL
MEASURED
5
4
3
2
1
800 400 600 800 1000 1800 1400 1600 1800 8000
DISTANCE FROM SOURCE - FEET

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