Text

Rept on Radioactive Effluent Releases & Waste Disposal, for Jul-Dec 1981
	ML20049H545
Person / Time
Site:	Humboldt Bay
Issue date:	12/31/1981
From:	; PACIFIC GAS & ELECTRIC CO.
To:	;
Shared Package
ML20049H539	List: ML20049H538; ML20049H545; ML20049H547; ML20049H550;
References
	NUDOCS 8203030279
	Download: ML20049H545 (16)
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e PACIFIC GAS AND ELECTRIC COMPA?.~i DOCKET NO. 50-133 REPORT ON RADIOACTIVE EFFLUE';T RELEASES AND WASTE DISPOSAL FOR HLHBOLDT BAY POWER PLANT UNI! NO. 3, COVERING THE PERIOD JULY 1, 1981 THROUCH DECEMBER 31, 1981 8203030279 820301 PDR ADOCK 05C00133 R

PDR

t PACIFIC GAS AND ELECTRIC COMPANY DOCKET NO. 50-133 REPORT ON RADIOACTIVE EFFLUENT RELEASES AND b'ASTE DISPOSAL FOR HUMBOLDT BAY P0k'ER PLANT UNIT NO. 3, COVERING THE PERIOD JULY 1, 1981 THROUGH DECEMBER 31, 195.1 This report summarizes the quantity of each of the principal radionuclides released to unrestricted areas in liquids and gaseous effluents and summarizes radioactive waste disposal from July 1, 1981 to December 31, 1981 and is submitted in accordance with Section IX.I.3.a. of the Technical Specifications.

A.

SUPPLEMENTAL INFORMATION 1.

Regulatory Limits Fission and activation gases:

The current license limits are 50,000 uCi per second for an annual average release rate and 500,000 uCi per second for an instantaneous release.

b.

Iodines:

Refer to c., "Particulater."

c.

Particulates: The limit "for halogens and particulare material based on the isotopes present on the sampling filters after 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months decay period: is 0.18 pCi/sec.

d.

Liquid Ef fluents:

10CFR20.

2.

Maximum Permissible Concentrations Provide the MPC's used in determining allowable release rates or concentrations.

Fission and activation gases: Not applicable.

a.

b.

Iodines:

3x10~10 pCi/cc s

Particulates, half-lives >8 days: 3x10-10 uCi/cc c.

d.

Liquid effluents:

10CFR20, Table II. Appendix B.

3.

Average Energy Not applicable.

=2-4.

Measurements and Approximations of Total Radioactivity The methods used to measure or approximate the total radioactivity in effluents and the methods used to determine radionuclide composition are as follows:

Fission and activation gases:

a.

Due to the long decay time since operation (shutdown July 2, 1976), no detectable releases of fission and activation gases can be expected.

An arbitrary 1 microcurie of each nuclide found during operation has b cn reported.

b.

[odines:

Charcoal cartridges a e removed from the stack sampling system weekly and, after 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months decay, are gamma spectrum counted for I-131 and I-133 (vith an Intrinsic Germanium detector).

Due to the long decay time since operation, no detectable releases of Iodines have been found.

An arbitrary 1 microcurie of each nuclide found during operation has been reported.

2.

Particulates:

Filter papers are removed fror the stack sampling system weekly and gross beta counted. An arbitrary 1 microcurie has been reported for Batal40 and Sr89 due to the long decay time since operation.

Selected filters for each quarter are decay counted to determine other particulates (long-lived), alpha emitters, and are ar.alyzed for Sr90.

d.

Liqui.d Effluents:

Waste receiver tank and waste hold tank batch samples were gamma spectrum analyzed and gross beta and gross gamma counted.

The nuclides identified are adjusted to account for the gross gamma and the gross beta count.

Laundry waste tanks are individually analyzed only by gross beta and gross gamma counting, and based on the mixture determined above.

A quarterly composite of all batches was analyzed for Sr90 and Tritium.

-J-5.

Batch Releases a.

Liquid:

l 1)

Number of batch releases: 23 (A total of 3086 gallons of laundry waste and 60,170 gallons of treated waste tank discharge) 2)

Total time period for batch releases: 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months , 31 minutes 3)

Maximum time period for a batch release: 5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months , 40 minutes.

4)

Average time period for batch releases:

I hour, 40 minutes 5)

Minimum time period for a batch release: 10 minutes 6)

Average stream flow during periods of release of effluent into a flowing stream:

Not Applicable; Discharge is into Humboldt Bay.

b.

Gaseous:

None 6.

Abnormal Releases a.

Liquid:

1)

Number of releases: None 2)

Total activity released:

None b.

Gasecus:

1)

Number of releases: None 2)

Total activity released:

None B.

GASEOUS EFFLUENTS The monitoring systems associated with the emergency condenser anc liquid radwaste system vents to atmosphere indicate that no detectable releases of radioactive gases occurred during the report period.

Therefore, only gaseous radioactive waste releases made via the 253 foot stack are reported.

Table B-1 summarizes the total quantities of radioactive effluents released by quarter.

Table B-2 summarizes the total quantities for each of the nuclides determined to be released.

9

~

4-C.

LIQUID EFFLUENTS The activity in each batch of liquid radioactive waste was either in solution at the time of discharge or the batch was filtered prior to discharge. Analysis of weekly samples from the plant ef fluent canal and monitoring by the liquid waste discharge monitor cenfirmed that no unaccounted release of radioactive waste occurred during the report period.

Table C-1 summarizes the total quantities of r-Jioactive effluents released by quarter.

Table C-2 summarizes the total quantity for each of the nuclides determined to be released.

D.

SOLID WASTE No solid waste was shipped during the report period. Therefore, Table D1 (to summarize waste shipments) is not included.

5_

E.

ENVIRONMENTAL MONITORING The environmental radiation monitoring program was continued unchanged during this period.

Radiation Study in the Vicinity of HumboldtRoutine quarterly reoprts, "Envircnmental Bay Power Plant (IIBPp ),

Eureka, California", contain the basic radiolngic data collected from the Humboldt Bay Power Plant environs.

for and submitted to several state agencies. These reports are prepared The latest Nos. 81 and 82, are attached with certain data from the second and

reports, third quarters of 1981.

These quarterly reportc describe the sampling locations, total number of samples of each media sampled, and the measured radioactivity concentration in the samples.

The types of media samples are marine flora, fish, and invertebraes; bottom seditent; milk; air particulates; and external exposure measured by ion chambers.

Plant releases continued to be much Icwer than when the plant last operated.

The calculated potential public exposures due to the plant releases were very low at that time. Therefore, potential exposure calculations were determined only fro:: the dosimetry date.

Data from the second half of 1981 was used for these calculations.

Thei -

of ti.e plant.are currently 30 dosinctry stations in the vicinity Ionization chambers, read on a biweekly basis, are used fur dosimetry.

Stations 2 and 5 are considered to be background in that they are assumed to be completely removed from the influence of the plant.

In ordct to test for statistically significant difference between stations, two statistical tests (a two-way classification, and a 951 confidence limit least significant difference test) were made during biweekly dosimeter readings for each station.

The following table details results of this analysis.

The yearly exposure results for each station were based on biweekly data extrapolated to one year and are listed in order from highest lowest exposures.

to

-- ~

STATISTICAL ANALYSIS OF DOSIMETRY DATA

.6-(SECOND HALF 0F 1981)

STATION MEAN mR/vr 1

3.32 92.83 16 3.29 92.00 23 3.26 91.40 2

3.32 90.40 Considered Background 26 3.13 87.60 20 3.10 86.80

~

27 3.10 86.80 9

3.02 84.62 10 3.02 84.60 29 3.02 84.43 28 2.95 82.60 11 2.95 82.49 15 2.94 82.28 21 2.94 82.20 5

2.93 82.00 Considered Background 8

2.92 81.80 3

2.91 81.60 14 2.86 80.00 18 2.86 80.00 13 2.85 79.69 30 2.84 79.60 4

2.81 78.62 25 2.81 78.60 24 2.78 77.80 6

2.17 77.60 22 2.77 77.60 7

2.76 77.40 12 2.76 77.20 17 2.75 77.00 19 2.75 77.00 Least significant difference between stations means = 0.49 Least s igr.i f ic an t difference between replication means = 0.67

~7-F.

METEOROLOGICAL DATA Wind speed and direction and temperature differential are presently recorded on strip charts, but the meteorological data logging system was removed from service in 1967.

Therefore, the information specified by Regulatory Guide 1.21, Appendix B, Section F, is not readily available for this report period.

Table F1 summarizes the cumulative joint -frequency distribution of wind speed, wind direction, and atmospheric stability for the period April, 1962 through June, 1967 when the meteorolegical data logging system was in service.

TABLE D1 EFFLUENT AND WASTE DISPOSAL SDtIANNUAL REPORT 1981 CASEOUS EFFLUENTS - SUMMATION OF AL.L RELEASES j_

Third Fourth Total Est.

Unit Quarter Quarter Error 1.

A.

Fission 6 activation gases 1.

Total release Ci LT 1.10E-5 L1 1.10E-5 2.00E1 2.

Average release rate for period uCf /.sec. LT 1.38E-6 LT 1.38E-6 i

3.

Percent of Technical Specification limit LT 2.77E-9 l LT2 77E-9 B.

Iodines 1.

Total iodine-131 Ci LT 1.00E-6 LT 1.00E-6 1.50El 2.

Average release rate I

j for period (I-131) uCi/ser LT 1.26E-7 LT 1.26E-7 3.

Percent of Technical I

j Specification limit LT6.99E-5 i

LT 6.99E-Sl C.

Particulates t

1.

Particulates with half-I lives >3 days ci ____4_LT4.46E-5 LT1.92E-4 1.50E1 2.

Average release rate l

for period uCi/sec LT3.61E-6 l LT2.42E-5 3.

Percent of Technical I

{

Specification limit

._j ___LT3.12E-3

! LT1.34E-2 l

4.

Gross alpha radioactivity Ci l

9.55E-7 l

LT6.28E-7 D.

Tritiu=

\\

1.

Total telease Ci LT 1.00E-2 LT1.00E-2l5.00E1 2.

Average release rate

}

for period uCi/sec LT 1, 26E-3 LT 1.26E-3,

TABLE B2 EFFLUENT AND WASTE DISPOSAL SEMI ANNUAL REPORT 1981 GASEOUS EFFLUENTS - ELEVATED RELEASE Continuous Mode Nuclides Released Unit i

Third Fourth I

Quarter Ocarter i

1.

Fission gases krypton-83M Ci i LT1. 00E-6**

T -

tT1.00E-w i krvpton-89 Ci ITE1.00E-6**

1 1/11.00E-6^*I krypton-SSM Ci LT U DE-6**

Lil'.' BOT:-6*

l krvoton-87 Ci LT1.00E-6**

LT1.00E-6*i; krypton-88 Ci LT1.00E-6**

LII. 061'-6 *

t xenon-133 Ci LT1.00E-6*"

LT1.00E-6*El xenon-135 C1 1.T 1. 00 E-6 *

1.TI00E-6**l xenen-135m Ci IT1.00E-6**

LT 1. 00 r:- 6"*

xenon-138 Ci LT1.00r-6*x LT1.00E-6**

~ l xenon-137 Ci LT 1. 0fi T-6 *

L'll.00E-F xcnon-133m l Ci

_ ___ __ _'C W lil 1. 00 i'. *

L11.~00f?

l Ill 1.10E-5*j 1.10E-5 **

1/1 Total for period Ci 2.

Iodines iodine-131 i C1

[T1.00E-6**

L11.001;-6*.

iodine-133 Ci dLT1.00E-6A I

'LT1.00E-6**1 iodine-135 Ci i LT1.00E-6**

LT1.00E-6**I i

Total for period Ci jLT3.00E-6**

L13.00E-f**;

3.

Particulates secontium-89 Ci QT1.00F;-6*u LT1.00E-6**i strontius. 90 Ci i LT1.28E-6*

I LT1.39E-6* I cesium-134 Ci LT5.66E-6*

l fT CDTF-I2*~^

cesium-137 Ci lR-6

5. 0'3 E T i

barium-lanthanum-140 C1 LT1.00E-6**

L'l 1. 00 E-6 *

1 cobalt-60 C1 1.92E-5 1.191;-4 i

manganese-54 Ci LT4.00E-6*

LT4.00E-(6*l cerium-144 Ci LT 9. 00 E-6

LT 9. 00E-The minimum sensitivity of the plant spectrometer system for a particular nuclide depends upon the mixture of nuclido., present in each sample. Those nuclides expected to be present, but not detected, are reported "Less Than" (LT) typical sample detection levels.

No release was detected due to the decay time since the Unit was shutdown on July 2, 1976. Quantities reported are an arbitrary 1 micro-curie per nuclide.

TABLE Cl EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT 1981 LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES I

Est.

~

Third Fourth Total Unit Ouarter Quarter Error l

1 A.

Fission and activation products 1.

Total release (not including tritium, gases, alpha)

Ci 3.63E-3 7.14E-2 1.50El 2.

Average diluted concentra-1.43E-10 2.78E-9 tion during period UCi/ml 3.

Percent of applicabic limit 1.11E-3 1.17E-2 B.

Tritium 1.

Total release

' ct 2.01E-2 3.745-2 4.00E0 2.

Average diluted concentra-7.94E-10 1.46E-9 tion during period pCi/ml 3.

Percent of applicable limit 2.65E-5 4.P7E-5 C.

Dissolved and entrained gases 1.

Total release C f.

l LT2.00E-6 LT2.00E-6 5.00El D.

Cross alpha radioactivity 1.

Total release Ci LT1.10E-4 LT6.24E-4 7.50El E.

Volume of waste released l

~

l (prior to dilution) liter l 3.59E4 2.04E5 I5.00E0 F.

Volume of dilution water l

j used during period

. liter l 2.53E10 2.57E10 l5.00E0

EFFLUENT AND WASTE DISPOSAL SEMI ANNUAL REPORT 1981 LIQUID EFFLUENTS Batch mode Nuclides Released Unit

~

Third Fourth O prter Quarter ___

strontium-09 Ci LT1.00E-6**

LT1.00E-6**

strontium-90 C1 2,.8 4 E.- 5

_ f 1.45E-4 cesium-134 Ci i

1. M -4 1.30FT'3 i

cesium-137 Ci 3.06E-3_ _.

i 2.60E-2 iodtne-131 Ci LT1.00E-6**

l LT1.00E-ff*

cobalt-58 Ci LT1.00E-6**

l LT1.00L 6**

l cobalt-60 Ci

" 3.00E-4 i

CiBEJ2 zine-65 Ci LT1.16E-5*

l

_ manganese-54 Ci LT5.131-6*

~

Li 4.15E' -4~7 6.370--4 chromium-51 Ci LT1.00E-6**

LT1.00E-6**

I zirconium-niobium-95 Ci LT1.00E-6**

LT1.00E CF"

~

Z

__ molybdenum-99 Ci LT1.00E-6**

LT1.00L W C

technetium-99m Ci LT1.00r-6**

LT1. GUT F

'j barium-lanthanum-140 Ci LT1. 00E -6 *

LT1301-EE ce rium-144 j

Ci LT6.19E-5*

LT1.04E-1*

neptunium-239 Ci l LT1.00E-6**

L1130T-W j

I I

l l Total for period (above) l Ci l 3.63E-3 l

7.34E-2 l

xenon-133 Ci LT1.00E-6**

LT1. 0FE-- 6 "

xenen-135 Ci LT1.00E-6**

IJT 007 6**

The minimum sensitivity of the plant's spectrometer systcm for a particular nuclide depends upon the mixture of nuclides present in each batch. Those nuclides possibly present, but not detected, are reported "Less Than" (LT) typical sample detection levels.

- No release was detected due to the decay time since the unit was shutdown on July 2, 1976.

Quantitics reported are an arbitrary 1 micro-curie per nuclide.

W

TABLE Fl I

PERCENT OF PERIOD AT EACH WIND SPEED AND DIRECTION PERIOD OF RECORD: April, 1962 through June 1967 STABILITY CLASS:

C ELEVATION:

250 feet

~

Wind Speed (mph) at 76m Level Wind Direction (0) 0-3 4-7 8-12 13-18 19-24

>24 Totall 0.

0.02 0.06 0.05 0.03 0.02 0.01 0.20 10.00 0.02 0.03 0.04 0.03 0.01 0.00 0.13 20.00 0.03 0.03 0.01 0.01 0.00 0.00 0.0E 30.00 0.02 0.02 0.00 0.00 0.00 0.00 0.04 40.00 0.00 0.01 0.00 0.01 0.00 0.00 0.02 50.00 0.01 0.01 0.00 0.00 0.00 0.00 0.02 60.00 0.01 0.01 0.00 0.00 0.00 0.00 0.03 70.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 80.00 0.01 0.00 0.00 0.00 0.00 0.00 0.01 90.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 100.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 110.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 120.00 0.01 0.01 0.01 J.00 0.00 0.00 0.03 130.00 0.01 0.01 0.00 0.01 0.00 0.00 0.03 140.00 0.00 0.01 0.01 0.00 0.01 0.00 0.02 150.00 0.00 0.01 0.01 0.02

-0.01 0.00 0.06 160.00 0.00 0.01 0.01 0.01 0.01 0.00 0.04 170.00 0.00 0.00 0.02 0.02 0.01 0.01 0.07 180.00 0.00 0.01 0.02 0.02 0.00 0.00 0.05 190.00 0.01 0.01 0.01 0.01 0.01 0.00 0.04 200.00 0.00 0.02 0.02 0.02 0.00 0.01 0.09 210.00 0.02 0.03 0.06 0.02 0.01 0.00 0.13 220.00 0.01 0.02

'O.08 0.04 0.03 0.02 0.19 230.00 0.01 0.06 0.12 0.14 0.05 0.02 0.39 240.00

,0.01 0.09 0.22 0.15 0.02 0.03 0.51 250.00 0.02 0.18 0.26 0.10 0.02 0.00 0.55 260.00 0.02 0.13 0.24 0.04 0.01 0.00 0.44 270.00 0.02 0.16 0.22 0.02 0.01 0.00 0.42 280.00 0.02 0.13 0.11 0.01 0.00 0.00 0.27 290.00 0.02 0.10 0.10 0.01 0.01

'O.00 0.24 300.00 0.01 0.09 0.06 0.00 0.00 0.0^

C.15 310.00 0.01 0.04 0.06 0.01 0.00 0.0^

0.12 320.00 0.01 0.03 0.05 0.01 0.01 0.C1 0.12 330.00 0.01 0.03 0.03 0.01 0.02 0.02 0.11

\\

340.00 0.01 0.0' O.04 0.03 0.02 0.01 0.15 350.00 0.01 0.02 0.06 0.07 0.05 0.01 0.22 t

I Rovs may not sum to exact total due to rounding of f.

n L

TAntt v1 (conti PERCE!;T OF PERIOD AT CACll b'IND SPEED AND DIRECTION PERIOD OF RECORD:

April 1962 through June 1967 STABILITY CLASS:

D ELEVATION:

250 feet Wind Speed (tr.ph) at 76n. Level Wind Direction 0-3 4-7 3-12 13-18_

19-24

>24 Tote

'O.00 0.11 0.34 0.78 0.85 0.49 0.48 3.05 10.00 0.04 0.27 0.52 0.46 0.38 0.27 1.95 20.00 0.05 0.21 0.32 0.19 0.16 0.11 1.0' 30.00 0.06 0.20 0.16 0.08 0.03 0.04 0.5E 40.00 0.05 0.11 0.05 0.02 0.00 0.01 0.23 50.00 0.03 0.05 0.08 0.00 0.01 0.00 0.16 60.00 0.04 0.08 0.04 0.00 0.00 0.00 0.15 70.00 0.04 0.02 0.01 0.01 0.00 0.00 0.08 80.00 0.02 0.04 0.00 0.01 0.00 0.00 0.07 90.00 0.01 0.04 0.03 0.00 0.00 0.00 0.09 100.00 0.02 0.01 0.02 0.00 0.00 0.00 0.05 110.00 0.00 0.03 0.01 0.01 0.01 0.00 0.0C 120.00 0.02 0.03 0.03 0.02 0.1 0.00 0.11 130.00 0.01 0.03 0.02 0.02 0.01 0.02 0.1C 140.00 0.02 0.03 0.02 0.04 0'.01 0.01 0.13 150.00 0.03 0.03 0.03 0.09 0.03 0.C2 0.23 160.00 0.03 0.04 0.05 0.10 0.04 0.01 0.2C 170.00 0.02 0.05 0.12 0.16 0.04 0.0 0.40 180.00 0.04 0.06 0.12 0.13 0.03 0.01 0.40 190.00 0.02 0.07 0.09 0.06 0.03 0.02 0.25 200.00 0.05 0.10 0.17 0.11 0.02 0.01 0.4C 210.00 0.05 0.12 0.20 0.06 0.04 0.01 0.51 220.00 0.05 0.14 0.14 0.12 0.05 0.02 0.51 230.00 0.03 0.14 0.17 0.11 0.06 0.02 0.53 240.00 0.08 0.22 0.21 0.06 0.03 0.01 0.61 250.00 0.08 0.17 0.13 0.04 0.01 0.00 0.43 260.00 0.08 0.22 0.13 0.02 0.01 0.00 0.47 270.00 0.12 0.21 0.11 0.03 0.01 0.00 0.49 280.00 0.05 0.20 0.11 0.04 0.00 0.00 0.40 290.00 0.04 0.22 0.11 0.02 0.00 0.00 0.39 300.00 0.10 0.21 0.20 0.02 0.01 0.00 0.53 310.00 0.08 0.28 0.19 0.03 0.02 0.01 0.00 320.00 0.07

0.25 0.33 0.09 0.04 0.01 0 E0 330.00 0.05 0.21 0.35 0.16 0.09 0.03 0.9:

340.00 0.07 0.24 0.50 0.47 0.17 C.CE 1.53 350.00 0.07 0.30 0.62 0.E6 0.49 0.33 2.57

^~

TABLE r A (conts e

g t

PERCENT OF PERIOD AT EACll VIND SPEED AN. DIRECT 10S PERIOD OF RECORD: April 1962 through June 1967 STABILITY CLASS: E ELEVATION: 250-feet i

Wind Speed (mph) at 76= Level Wind Direction 0-3 4-7 8-12 13-18 19-24

>24 Total 0.00 1.04 1.06 2.00 1.84 0.82 0.10 6.86 10.00 0.17 0.80 1.55 0.90 0.36 0.10 3.78 20.00 0.30 0.83 1.26 0.47 0.13 0.00 2.99 30.00 0.37 0.73 0.64 0.19 0.01 0.00 1.94 40.00 0.21 0.60 0.47 0.02 0.00 0.00 1.31 50.00 0.18 0.56 0.28 0.02 0.00 0.00 1.05 60.00 0.21 0.54 0.19 0.00 0.00 0.00 0.93 70.00 0.19 0.44 0.07 0.00 0.00 0.00 0.81 80.00 0.20 0.41 0.07 0.00 0.00 0.00 0.6S 90.00 0.27 0.47 0.17 0.01 0.00 0.00 0.E2 100.00 0.17 0.24 0.06 0.01 0.00 0.00 0.49 110.00 0.20 0.31 0.10 0.00 0.00 0.00 0.60 120.00 0.16 0.31 0.19 0.01 0.02 0.

3 0.70 130.00 0.14 0.25 0.09 0.06 0.03 0.03 0.72 140.00 0.09 0.22 0.21 0.23 0.22 0.25 1.21 350.,00 0.09 0.24 0.22 0.45 0.52 0.46 2.0E 360.00 0.05 0.22 0.25 0.62 0.44 0.21 1.79 170.00 0.04 0.26 0.43 0.73 0.23 0.09 1.E9 180.00 0.26 0.32 0.45 0.43 0.20 0.02 1.77 190.00 0.15 0.26 0.37 0.35 0.15 0.02 1.20 200.00 0,22 0.48 0.47 0.26 0.18 0.06 1.77 210.00 0.20 0.44

,0.58 0.18 0.05 0.04 1.60 220.00 0.20 0.40 0.55 0.15 0.14 0.03 1.37 230.00 0.23 0.43 0.40 0.14 0.13 0.05 1.39 240.00

'O.24 0.39 0.23 0.15 0.13 0.01 1.24 250.00 0.21 0.32 0.16 0.03 0.01 0.01 0.84 260.00 0.24 0.31 0.17 0.03 0.00 0.00 0.85 270.00 0.35 0.35 0.13 0.12 0.01 0.00 0.97 280.00 0.19 0.30 0.15 0.01 0.01 0.01 0.67 290.00 0.19 0.33 0.17 0.01 0.01 0.01 0.61 300.00 0.21 0.37 0.16 0.01 0.00 0.01 0.EE 310.00 0.?0 0.47 0.29 0.02 0.00 0.00 0.95 320.00 0.20 0.59

0. 65 0.12 0.01 0.05 1.72 330.00 0.22 0.67 0.98 0.35 0.02 0.02 2.4.

340.00 0.20 0.66 1.55 0.74 0.01 0.00 3.4E 350.00 0.19 1.02 2.02 1.41 0.55 0.33 5.22 0

-~

s

' " ' ^

TAEI.E I'1 PERCENT OF PERIOD AT EACll WIND Sl'I'.ED AND DIRECTION PERIOD OF RECORD: April 1962 through June 1967 STABILITY CLASS:

F ELEVATION:

250 feet Wind Spee1 (raph) at 76m I.evel Wind Direction 0-3 4-7 8-12 11-16 19-24

>24 Total 0.00 0.42 0.08 0.03 0.00 0.00

( 00 0.53 10.00 0.05 0.06 0.05 0.01 0.00 O.1E 20.00 0.05 0.09 0.08 0.03 0.00 0.30 0.24 30.00 0.12 0.11 0.10 0.04 0.00 0.00 0.37 40.00 0.07 0.13 0.10 0.03 0.01 0.00 0.34 50.00 0.09 0.13 0.06 0.00 0.00 0.03 0.27 60.00 0.14 0.19 0.07 0.01 0.00 0.00 0.40 70.00 0.11 0.22 0.0a 0.00 0.00 0.00 0.40 80.00 0.10 0.22 0.07 0.00 0.00 0.00 0.39 00.00 0.14 0.25 0.07 0.00 0.00 0.00 C.40 100.00 0.11 0.29 0.09 0.01 0.01 0.0C 0.51 110.00 0.13 0.31 0.13 0.02 0.00 0.00 0.59 120.00 0.15 0.33 0.18 0.03 0.00 0.00 C.09 130.00 0.10 0.23 0.14 0.02 0.00 0.00 0.50 140.00 0.10 0.22 0.11 0.09 0.02 0.00 0.54 150.00 0.12 0.19 0.10 0.07 0.03 0.02 0. 5 'i 160.00 0.08 0.15 0.16 0.08 0.01 0.00 0.67 170.00 0.07 0.15 0.14 0.07 0.00 0.00 0.43 180.00 0.16 0.26 0.13 0.02 0.00 0.00 0.56 190.00 0.12 0.18 0.13 0.02 0.00 0.01 0.46 200.00 0.13 0.25

,0.18 0.02 0.00 0.00 0 58 210.00 0.18 0.32 0.20 0.02 0.00 0.01 0.73 220.00 0.14 0.28 0.09 0.C2 0.00 0.03 0.54 230.00 0.18 0.24 0.07 0.01 0.01 0.0; C.50 240.00 0.19 0.19 0.05 0.02 0.00 0.00 0.45 250.00 0.15 0.16 0.01 0.00 0.00 0.00 0.32 260.00 0.17 0.10 0.01 0.00 0.00 0.00 0.29 270.00 0.18 0.09 0.01 0.00 0.00 0.00 0.28 280.00 0.10 0.04 0.01 0.00 0.00 0.00 0.15 290.00 0.11 0.05 0.01 0.00 0.00 0.00 0.16 300.00 0.13 0.07 0.00 0.00 0.00 0.00 0.19

(

310.0C 0.07 0.05 0.01 0.00 0.00 0.00 0.13 320.00 0.09 0.05 0.03 0.00 0.00 0.00 0.17 330.00 0.09 0.09 0.01 0.00 0.00 0. 0 ',

0.19 340.00 0.06 0.10 0.03 0.01-0.00 0.00 0.20 350.00 0.07 0.09 0.05 0.01 0.00 0.00 0.21

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ML20049H545

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