-------
REPORT
ON
PELICAN LAKE
ST, LOUIS COUNT/
MINNESOTA
EPA REGION V
1/ORKiNG PAPER rlo, 118
WITH THE COOPERATION OF THE
MINNESOTA POLLUTION CONTROL AGENCY
AND THE
MINNESOTA I!ATIONAL GUARD
OCTOBER, 1974
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1
CONTENTS
Page
Foreword ii
List of Minnesota Study Lakes iv, v
Lake and Drainage Area Map vi
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 3
III. Lake Water Quality Summary 4
IV. Nutrient Loadings 8
V. Literature Reviewed 13
VI. Appendices 14
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•11
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration cormiibiient to investigate the nation-
wide threat of accelerated eutrophication to fresh water lakes and
reservoirs.
OBJECTIVES
The Survey was designed to develop, in conjunction with state
environmental agencies, information on nutrient sources, concentrations,
and impact on selected freshwater lakes as a basis for formulating
comprehensive and coordinated national, regional, and state management
practices relating to point-source discharge reduction and non-point
source pollution abatement in lake watersheds.
ANALYTIC APPROACH
The mathematical and statistical procedures selected for the
Survey’s eutrophication analysis are based on related concepts that:
a. A generalized representation or model relating
sources, concentrations, and impacts can be constructed.
b. By applying measurements of relevant parameters
associated with lake degradation, the generalized model
can be transformed into an operational representation of
a lake, its drainage basin, and related nutrients.
c. With such a transformation, an assessment of the
potential for eutrophication control can be made.
LAKE ANALYSIS
In this report, the first stage of evaluation of lake and water-
shed data collected from the study lake and its drainage basin is
documented. The report is formatted to provide state environmental
agencies with specific information for basin planning [ 3O3(e)], water
quality criteria/standards review [ 3O3(c)], clean lakes [ 3l4(a,b)],
and water quality monitoring [ lO6 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
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111
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condi-
tion are being made to advance the rationale and data base for
refinement of nutrient water quality criteria for the Nation’s
fresh water lakes. Likewise, multivariate evaluations for the
relationships between land use, nutrient export, and trophic
condition, by lake class or use, are being developed to assist
in the formulation of planning guidelines and policies by EPA
and to augment plans implementation by the states.
A C KNO WL ED GM E NT
The staff of the National Eutrophication Survey (Office of
Research & Development, U. S. Environmental Protection Agency)
expresses sincere appreciation to the Minnesota Pollution Control
Agency for professional involvement and to the Minnesota National
Guard for conducting the tributary sampling phase of the Survey.
Grant J. Merritt, Director of the Minnesota Pollution Control
Agency, John F. McGuire, Chief, and Joel G. Schilling, Biologist,
of the Section of Surface and Groundwater, Division of Water Quality,
provided invaluable lake documentation and counsel during the course
of the Survey; and the staff of the Section of Municipal Works, Divi-
sion of Water Quality, were most helpful in identifying point sources
and soliciting municipal participation in the Survey.
Major General Chester J. Moeglein, the Adjutant General of
Minnesota, and Project Officer Major Adrian Beltrand, who directed
the volunteer efforts of the Minnesota National Guardsmen, are also
gratefully acknowledged for their assistance to the Survey.
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iv
NATIONAL EUT PHICATION SURVEY
STUDY LAKES
STATE OF MINNESOTA
LAKE NAME COUNTY
Albert Lea Freeborn
Andrusia Beltrami
Badger Polk
Bartlett Koochiching
Bear Freeborn
Bemidji Beltrami
Big Stearns
Big Stone Big Stone, MN; Roberts,
Grant, SD
Birch Cass
Blackduck Beltrami
Blackhoof Crow Wing
Budd Martin
Buffalo Wright
Calhoun Hennepin
Carlos Douglas
Carrigan Wright
Cass Beltrami, Cass
Clearwater Wright, Stearns
Cokato Wright
Cranberry Crow Wing
Darling Douglas
Elbow St. Louis
Embarass St. Louis
Fall Lake
Forest Washington
Green Kandiyohi
Gull Cass
Heron Jackson
Leech Cass
Le Homme Dieu Douglas
Lily Blue Earth
Little Grant
Lost St. Louis
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V
LAKE NAME COUNTY
Madison Blue Earth
Malmedal Pope
Mashkenode St. Louis
McQuade St. Louis
Minnetonka Hennepin
Minnewaska Pope
Mud Itasca
Nest Kandiyohi
Pelican St. Louis
Pepin Goodhue, Wabasha, MN;
Pierce, Pepin, WI
Rabbit Crow Wing
Sakatah Le Sueur
Shagawa St. Louis
Silver McLeod
Six Mile St. Louis
Spring Washington, Dakota
St. Croix Washington, MN; St. Croix,
Pierce, WI
St. Louis Bay St. Louis, MN; Douglas, WI
Superior Bay St. Louis, MN; Douglas, WI
Swan Itasca
Trace Todd
Trout Itasca
Wagonga Kandiyohi
Wailmark Chisago
White Bear Washington
Winona Douglas
Wolf Beltrami, Hubbard
Woodcock Kandiyohi
Zumbro Olrnstead, Wabasha
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Cusso.i
,/
3
/
PELICAN LAKE
Lake Sampling Site
Tributary Sampling Site
Sewage Treatment Facilfty
Direct Drainage Area Limits
I2 2 Mi.
U
\_ _ Minn.
Map Location
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PELICAN LAKE
STORET NO. 2765
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate Pelican Lake is mesotrophic; water
quality in this lake was relatively good during the sampling
year. Of the 60 Minnesota lakes sampled in the fall when essen-
tially all were well-mixed, 42 had more mean total phosphorus,
39 had more mean dissolved phosphorus, and 49 had more mean inor-
ganic nitrogen. For all 80 lakes sampled, 64% had more mean
chlorophyll a, and 65% had less mean Secchi disc transparency.
Although Survey limnologists did not observe any algal
concentrations or weed problems, there was some depression of
dissolved oxygen with depth at stations 1 and 2 and near deple-
tion at station 3 in July. They noted a distinct hydrogen—
sulfide odor in the deep samples at station 3.
B. Rate-Limiting Nutrient:
A significant change in nutrients occurred in the algal
assay sample between the time of collection and the beginning
of the assay, and the results are not reliable. However, the
lake data indicate phosphorus limitation in July and September
(N/P ratios were 21/1 and 15/1, respectively) and nitrogen
limitation in October (N/P ratio was 6/1).
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2
C. Nutrient Controllability:
1. Point sources—-During the sampling year, Pelican Lake
received a total phosphorus load at a rate less than that pro-
posed by Vollenweider (in press) as permissible 11 (i.e., an
oligotrophic rate—-see page 12). Of this load, it is estimated
that the Village of Orr contributed only about 14%.
Because of the location of the Orr discharge near the outlet
of the lake (and thus not likely to affect the main body of the
lake) and the relatively small contribution to the total phos-
phorus load, it is concluded that point-source phosphorus control
would have little effect on the trophic condition of Pelican Lake.
2. Non-point sources--The phosphorus export of Sucker Creek
during the sampling year was somewhat higher but similar to that
of other unimpacted Minnesota streams studied elsewhere (see page
12).
The combined contribution of phosohorus from all non-point
sources is estimated at about 83% of the total phosphorus load
reaching the lake during the sampling year.
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3
II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
A. Lake Morphometry*:
1. Surface area: 10,945 acres.
2. Mean depth: 7.9 feet.
3. Maximum depth: 38 feet.
4. Volume: 86,466 acre/feet.
5. Mean hydraulic retention time: 3.3 years.
B. Tributary and Outlet:
(See Appendix A for flow data)
1. Tributaries —
Name Drainage areat Mean flowt
Sucker Creek 7.4 m1 2 4.2 cfs
Minor tributaries & 2
iimiediate drainage — 44.8 mi 32 4 cfs
Totals 52.2 m1 2 36.6 cfs
2. Outlet —
Elbow River 69.3 rni 2 tt 36.6 cfs
C. Precipitationttt:
1. Year of sampling: 37.1 inches.
2. Mean annual: 36.7 inches.
* DNR lake survey map (1960); mean depth by random-dot method.
t Drainage areas are accurate within ±5%; mean daily flows are accurate
within ±10%; and ungaged flows are accurate within ±10 to 25% for drainage
areas greater than 10 mi 2 .
ft Includes area of lake.
+tt See Working Paper No. 1 , Survey Methods”.
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4
III. LAKE WATER QUALITY SUMMARY
Pelican Lake was sampled three times during the open-water season
of 1972 by means of a pontoon-equipped Huey helicopter. Each time,
samples for physical and chemical parameters were collected from three
stations on the lake and from a number of depths at each station (see
map, page vi). During each visit, a single depth-integrated (15 feet
or near bottom to surface) sample was composited from the stations for
phytoplankton identification and enumeration; and during the last visit,
a single five—gallon depth-integrated sample was composited for algal
assays. Also each time, a depth-integrated sample was collected from
each of the stations for chlorophyll a analysis. The maximum depths sam-
pled were 15 feet at station 1, 26 feet at station 2, and 14 feet at
station 3.
The results obtained are presented in full in Appendix B, and the
data for the fall sampling period, when the lake was essentially well-
mixed, are summarized below. Note, however, the Secchi disc summary
is based on all values.
For differences in the various parameters at the other sampling
times, refer to Appendix B.
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5
A. Physical and chemical characteristics:
FALL VALUES
(10/22/72)
Parameter Minimum Mean Median Maximum
Temperature (Cent.) 2.0 2.4 2.3 2.8
Dissolved oxygen (mg/l) 11.6 12.2 12.1 12.8
Conductivity (pmhos) 75 80 80 85
pH (units) 7.0 7.1 7.0 7.2
Alkalinity (mg/i) 34 36 36 38
Total P (mg/l) 0.016 0.033 0.033 0.047
Dissolved P (mg/i) 0.008 0.020 0.020 0.029
NO + NO (mg/i) 0.040 0.044 0.040 0.060
Am onia mg/l) 0.060 0.068 0.065 0.080
ALL VALUES
Secchi disc (inches) 42 67 67 88
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6
B. Biological characteristics:
1. Phytoplankton -
Sampling Dominant Number
Date Genera per ml
07/10/72 1 . Flagellates 362
2. Anabaena 354
3. Microcystis 271
4. Chroococcus 181
5. Merismopedia 136
Other genera 670
Total 1 ,974
09/07/72 1. Microcystis 4,910
2. Melosira 934
3. Anabaena 873
4. Tabellaria 632
5. Aphanocapsa 542
Other genera 2,501
Total 10,482
10/22/72 1. Flagellates 843
2. Dinobryon 738
3. Microcystis 407
4. Asterionella 331
5. Cryptomonas 75
Other genera 603
Total 2,997
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7
2. Chlorophyll a —
(Because of instrumentation problems during the 1972 sampling,
the following values may be in error by plus or minus 20 percent.)
Sampling Station Chlorophyll a
Date Number ( pg/i )
07/10/72 01 12.6
02 22.0
03 24.7
09/07/72 01 8.3
02 8.6
03 4.5
10/22/72 01 6.6
02 8.3
03 7.0
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8
IV. NUTRIENT LOADINGS
(See Appendix C for data)
For the determination of nutrient loadings, the Minnesota National
Guard collected monthly near-surface grab samples from each of the tribu-
tary sites indicated on the map (page vi), except for the high runoff
month of April when extra samples were collected, and the colder months
when one or more samples were omitted depending on the site. Sampling
was begun in October, 1972, and was completed in September, 1973.
Through an interagency agreement, stream flow estimates for the year
of sampling and a ‘normalized” or average year were provided by the
Minnesota District Office of the U.S. Geological Survey for the tributary
sites nearest the lake.
In this report, nutrient loads for sampled tributaries were deter-
mined by using a modification of a U.S. Geological Survey computer
program for calculating stream loadings. Nutrient loadings for unsampled
“minor tributaries and immediate drainage” (“ZZ” of U.S.G.S.) were esti-
mated by using the nutrient loads, in lbs/mi 2 /year, in Sucker Creek at
B-i and multiplying by the ZZ area in mi 2 .
The Village of Orr declined participation in the Survey, and nutrient
loads were estimated at 2.5 lbs P and 7.5 lbs N/capita/year.
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9
A. Waste Sources:
1. Known municipal —
Pop.
_____ Served
315*
Mean Receiving
Flow (mgd) Water
O.030** Pelican Lake
2. Known industrial - None
* Anonymous, 1973.
** Estimated at 100 gal/capita/day.
N a me
0 rr
Treatment
Trickling
filter
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10
B. Annual Total Phosphorus Loading - Average Year:
1 . Inputs —
lbs P1 % of
Source yr total
a. Tributaries (non—point load) -
Sucker Creek 410 7.4
b. Minor tributaries & imediate
drainage (non-point load) - 2,480 44.7
c. Known municipal -
Orr 790 14.2
d. Septic tanks* - 160 2.9
e. Known industrial - None - -
f. Direct precipitation** - 1,710 30.8
Total 5,550 100.0
2. Outputs —
Lake outlet — Pelican River 2,970
3. Net annual P accumulation - 2,580 pounds
* Estimated 261 lakeshore dwellings; see Working Paper No. 1.
** See Working Paper No. 1.
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11
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs —
lbsN/ %of
Source yr total
a. Tributaries (non—point load) -
Sucker Creek 10,840 5.7
b. Minor tributaries & imediate
drainage (non-point load) - 65,450 34.4
c. Known municipal -
Orr 2,360 1.2
d. Septic tanks* — 6,130 3.2
e. Known industrial - None -
f. Direct precipitation** - 105,440 55.4
Total 190,220 100.0
2. Outputs —
Lake outlet — Pelican River 75,580
3. Net annual N accumulation - 114,640 pounds
* Estimated 261 lakeshore dwellings; see Working Paper No. le
** See Working Paper No. 1.
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12
0. Mean Annual Non-point Nutrient Export by Subdralnage Area:
Tributary lbs P/mi 2 /yr lbs N/mi 2 fyv ’
Sucker Creek 55 1 .461
E. Yearly Loading Rates:
In the following table, the existing phosphorus loading
rates are compared to those proposed by Vollenweider (in press).
Essentially, his “dangerous” rate is the rate at which the
receiving waters would become eutrophic or remain eutrophic; his
“permissible” rate is that which would result in the receiving
water remaining oligotrophic or becoming oligotrophic if mor-
phometry permitted. A mesotrophic rate would be considered one
between “dangerous” and “permissible”.
Total Phosphorus Total Nitrogen
Units Total Accumulated Total Accumulated
lbs/acr /yr 0.5 0.2 17.4 10.5
grams/rn /yr 0.06 0.03 2.0 1.2
Vol1e weider loading rates for phosphorus
(gin /yr) based on mean depth and mean
hydraulic retention time of Pelican Lake:
“Dangerous” (eutrophic rate) 0.16
“Permissible” (oligotrophic rate) 0.08
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13
V. LITERATURE REVIEWED
Anonymous, 1973. Wastewater disposal facilities inventory. MPCA,
Minneapolis.
Schilling, Joel, 1974. Personal communication (lake map). MPCA,
Minneapolis.
Vollenweider, Richard A., (in press). Input-output models. Schweiz.
A. Hydrol.
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VII. APPENDICES
APPENDIX A
TRIBUTARY FLOW DATA
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1 - IrlITA Y FLOM INFO2UATION FO MINNESOTA 10/30/74
LA’cF COOE ‘765 “ LI’A!’I LAKE
1OT L At lAC,F 4PEA OF LAI
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APPENDIX B
PHYSICAL and CHEMICAL DATA
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STORET PET TEVAL DATE 74/10/30
276501
4 03 35.0 092 56 10.0
PELICAN LAKE
27 MINNESOTA
IIEPALES 2111202
3 0017 FEET DEPTH
0001) 00 ’i0 00077 00094 00400 00410 00630 00610 00665 00666
DATE TPAE IWPT9 wATER DO TRANSP CNDUCTVY PH 1 ALK NO?&N03 NH3—N PHOS—TOT PHOS—DIS
FROM OF TEMP SECCHI FIELD CACO3 N—TOTAL TOTAL
TO DAY FEET CE iT iG/L INCHES HJCROMHO SU MG/L MG/L MG/I MG/L P MG/L P
72/07/10 16 70 0000 67 90 7. 130 35 0.110 0.100 0.030 0.011
16 20 0004 ‘0.5 90 7.70 35 0.060 0.090 0.032 0.010
16 ‘0 0013 19.9 90 7.30 36 0.070 0.110 0.033 0.010
72/09/07 16 25 0000 66 95 7.50 36 0.070 0.100 0.022 0.011
16 25 0004 15.9 0.0 7.40 35 0.060 0.100 0.027 0.012
16 25 0015 15.5 11.M 8 7.50 38 0.060 0.100 0.023 0.010
7?/)0/?7 II 35 0000 77 RO 7.05 37 0.040 0.060 0.033 0.021
11 35 0004 ?.1 l2.’ 36 0.040 0.060 0.032 0.019
11 15 0015 .1 11.6 RD 7.20 35 0.040 0.060 0.020 0.012
7
DATE TIME IWPT-i CML P.-1YL
FROM OF
TO DAY FFFT u( /L
72/07/10 16 ‘0 0000
72/09/07 16 25 C000
72/10/27 I l 15 (1000 6.6J
J* VALUE KNOWN TO RE I i ERROR
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STORET RETRIEVAL DATE 74/10/30
276502
48 04 00.0 092 53 12.0
PELICAN LAKE
27 MINNESOTA
1 1EPALES
3
2111202
0031 FEET DEPTH
DATE
FROM
TO
72/07/10
72/09/07
72/10/2?
TIME DEPTH
OF
DAY FEET
17 00 0000
15 55 0000
11 10 0000
3’?17
CHL PHYL
A
(JG/L
72. OJ
• 3J
DATE
FROM
TO
TIME DEPTH
OF
DAY FEET
00010
00300
00077
00094
00400
00410
00630
00610
WATER
DO
TRANSP
CNDUCTVY
PH
T
ALK
N02&N03
NH3—N
TEMP
SECCHI
FIELD
CACO3
N—TOTAL
TOTAL
CENT
MG/L
INCHES
MICRONHO
SU
MG/L
HG/I
MG/L
7?/07/10 17 00 0000
17 00 0004
17 00 0015
17 00 0025
72/09/07 15 55 0000
15 55 0004
15 55 0015
15 55 0020
15 55 0026
72/10/22 11 10 0000
11 10 0004
11 10 0015
11 10 0022
20 • 7
20 • 1
19.9
16.3
15.
15.9
15.3
2.6
2.7
2.8
60
66
88
8.6
7.8
7.6
Q. 1
6.5
8.8
6.9
12.0
12.1
1?. 1
00665 10666
PHOS—TOT PHOS—DIS
HG.’tP NGILP
90 8.10
90 8.10
90 8.00
90 7.60
90 7.60
89 7.60
93 7.60
85 7.50
90 7.35
75 7.05
80 7.00
80 7.20
80 7.00
39 0.080
36 0.100
35 0.080
35 0.070
34 0.060
34 0.060
33 0.060
31 0.070
33 0.060
34 0.040
34 0.050
35 0.060
34 0.040
0.090
0.110
0 • 090
0 .080
0.100
0.090
0 • 090
0.100
0.090
0.070
0.080
0.080
0.080
0 • 033
0.040
0 • 034
0 • 036
o • 028
0.031
0,029
0.027
0.028
0 • 034
0.033
0.035
0.036
0.010
0.011
0.012
0.010
0.012
0.0 11
0.010
0.009
0.010
0,020
0.020
0 • 023
0 • 022
JO VALUF KNOWN TO BE IN ERROR
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STORET PETRIEVAL DATE 74/10/30
276503
48 04 10.0 09? 50 28.0
PELICAN LAt(E
27 MINNESOTA
1 LEPALES
3
2111202
0018 FEET DEPTH
DftTF
FPOM
TO
7?/07/ 10
7?/09/01
7?/ 10/2’
TIME DEPTH
0F
DAY FFET
17 35 0000
15 40 0000
10 sc oooo
32’ 17
C9LRPHYL
A
UC’ /L
24. 7J
7.OJ
DATE
FROM
TO
TIME DEPTH
OF
DAY FEET
00010
00300
00077
PH
T
ALK
MO2 NO3
NH3—N
WATER
DO
TRANSP
CND(JCTVY
CACO3
N—TOTAL
TOTAL
TEMP
CENT
MG/L
SECCHI
INCHES
FIELD
MICROMHO
SU
MG/L
MG/L
P4G/L
72/07/10 17 35 0000
17 35 0004
17 35 0014
7?/09/07 15 40 0000
15 40 0004
15 40 0010
7?/10/2? 10 55 0000
10 55 0004
10 55 0009
21.6
18.6
17.1
15.0
?.0
2.3
9.2
0.3
7 .6
7.6
12.8
12.3
42
72
95
95
110
88
SR
88
85
80
78
00665 00666
PHOS—TOT PHOS—DIS
MG/L P MG/L P
9.60
9.60
7.30
7.50
7.50
7.30
7.15
7.10
7.00
42 0.100
41 0.080
51 0.070
32 0.070
35 0.050
34 0.060
37 0.050
38 0.040
36 0.040
0.120
0.100
0.580
0.110
0.010
0.120
0.070
0.060
0 .060
0 • 036
0.027
0.108
0.027
0.022
0.0 19
0.041
0.047
0.016
0.0 11
0.011
0.0 19
0.0 12
0 .008
0.0 10
0.029
0.0 28
0.008
J VALUE KNOWN TO BE I’ ERROR
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APPENDIX C
TRIBUTARY DATA
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r AT 74/] /30
2765A1 LS2765A)
‘48 02 00.0 09? 50 00.0
PELICAN IVEP
27 7.5 o
0/PELICAN LAKE
CO i-sW? 23 WDG W GLENDALE BELOW O STP
I1EPALES 2111204
4 0000 FEET DEPTH
00610 00671 00f 6S
D TF TIMF FPT.-4 MO NO3 T 1T rcJFL Nrll—N PHOS—r)Is PHOS—TOT
rpoM N—TOTAL F’ 1OT L U THO
TO L)AY FEFT -lc,/L 1(/1 1(,/L c’/L i-
7?/10/14 1700 (‘•Q4 C.670 Q.I ?2 0.007 0.031
72/11/14 15 30 ).7’O 0.049 0.005 1 < 0.0 ,7
lliOIiiS 1f 10 I .03 ) O.7’0 0.18() 0.013 0.030
71/0.2/23 16 01 i . - ’flj t’.)52 0.016 0.035
7 /O4/O? 1’. 0 ( ..OI lrc 0. 4U 0.00 5K 0.0)4 0.065
71/04/14 ii 00 .0 ’”- ).7’U C.033 0.005K 0.020
71/0 ’/10 H CO ) .0iJ’( 1, ’OP c’.020 0.00 0.035
71/05/?! 14 00 1.? OC 1 C .’)36 0.010 0.030
71/6/14 II 1.4 .0 . iS7 0.029 0.065
71/(b7/ 1(o .20 00 ‘.Oj ?.‘IO ‘ 1.064 u.060 0.095
71/09/24 1 00 0. Ol orc 0. 0 u.02P 0.025 0.060
71/fl /2 )4 10 .J?1 1. . ’ +o 0.flH o.0?6 0.030
1< VALUE KNOWN TO RE LESS
THAN INOICATED
-------
STW T -‘/l /
?7 - I LS?7 R1
4 i CS 00.0 0’ ? 49 30.0
S iC r-fd “ LFK(AOOSE L P OUTLET)
7.5 O
I/’ LtCAN LA ’F
IJ 3 -Wf •- Mj t O VILLAGE LI ITS
JIE AL S 2111204
4 OOflO FEET 1)Er’TH
( (f 1U 00 71
‘)t T I ‘1F iFPT-i (i T it rc J L 1 4S’, P- flS—1)f 1 - 1 Pr-lOS—TOT
TOTAL U-)T-l’)
Ti j Y F’ E I’L ‘4(/L -, P 1G/L t )
7?/1O/1 . 1 ‘.1 *‘ I.j -.j ‘.?4 0.)07 0.Ut
7?’H/l’. 1c6 1. O.0C” 0.06?
73/)3/N l - 5 “.( - ‘ 1.70’) 0.fl4 ).100
7i’o’ ’i ii is ‘.0 ’ j.oic o.oso
71/P4/3fl II 3 ) 1. 0’ ‘.‘P° 0.00 K C.0 15
7 / )5/ 1 14 IS 1.r -C’ i .t &(’ (.024
71,0 -,/1 10 “5 “.( 1 0.073 0.03S
).011
71/’ /2-. 15 )‘- 1 ‘ .sJ1l
7- /”q/2. 4 1-4 .I I . ru I • fl f C.P 30
c VALUE NO N TO BE LESS
T9AN INDICATED
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