ML18026A367

Const Noise Progress Rept, Sound Level Measurements Near Susquehanna Steam Electric Station Site Const 1980.

ML18026A367
Person / Time
Site:	Susquehanna
Issue date:	03/31/1981
From:	Barnes J, Wood E BOLT, BERANCK & NEWMAN, INC.
To:
Shared Package
ML18026A229	List: ML18026A228 ML18026A367
References
3024A-5, NUDOCS 8106120202
Download: ML18026A367 (54)

Text

Report No. 3024A-5 SOUND LEVEL MEASUREMENTS NEAR SUSQUEHANNA STEAM ELECTRIC STATION SITE CONSTRUCTION 1980 Construction Noise Progress Report James D. Ba mes Eric W. Wood March 1981 Prepared by:

Bolt Beranek and Newman Inc.

50 Moulton Street Cambridge, MA 02138 Prepared for:

Pennsylvania Power and Light Company Two North Ninth Street Allentown, PA 18101 py0618 ~~++

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Report No. 3024A-5 Bolt Beranek and Newman Inc.

TABLE OF CONTENTS page LIST OF- FIGURES. ~ . ~ .......................... ~ . ~ ~ ~ ~ ~ ~ ~ 1 V LIST OF TABLES'............................................. iv SECTION 1. INTRODUCTION.................................. 1

2. SOUND LEVEL MEASUREMENTS NEAR THE SSES SITE... 3 APPENDIX G OCTOBER'1980 CONSTRUCTION SOUND PRESSURE L E VEL S ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ G

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LIST OF FIGURES page Figure 1. Map of general area near the SSES site showing sound level measurement; locations and site property line.............. ~ ~ ~ 5

, Figure 2. Map of area within five miles of SSES site showing dist;ant ambient sound level measure-ment locations and site property lines..........

Figure 3. Photograph of construction of main station complex taken on 31 July 1980. Uiew looking o the sout;h.................. 7 Figure 4. Median ambient, and 1974-1976, and 1978-1980 construction sound pressure levels obtained at location 2.. ~ ~ ~ ~ ~ ~ ~ ~ 8 Figure 5. Median ambient, and 1974-1976, and 1978-1980 construction sound pressure levels obtained at location 3..................... ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 9 Figure 6. Median ambient, and 1974-1976, and 1978-1980 construction sound pressure levels obtained at location 4..................... ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 10 Figure 7. Median ambient;, and 1974-1976, and 1978-1980 construction sound pressure levels obtained at location 5..................... ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ll LIST OF TABLES Table I. List of instruments used during trip showing dates of laboratory calibrat;ion.................

Table II. Summary of median sound level measurements, 13 d BA o ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

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Report No. 3024A-5 Bolt Beranek and Newman Inc.

INTRODUCTION This is the sixth in a series of progress report;s that present the results of const;ruction noise measurement;s made in the vicinity of the Susquehanna St;earn Electric Station (SSES) site. These measurements, obtained by Bolt Beranek and Newman Inc. (BBN) during the week of 6-10 October 1980, serve to update the acoustic description of the community near t;he site. Xn addit;ion, ambient sound level measurements were made at five locations more distant from the site. The five previous report;s summarize the ambient and construction noise measurements obtained in the years 1972 t'hrough 1979.

Construction activity continued on Units 1 and 2 and the common facilities during the October 1980 site visit. At that time, work was concentrated in the main power block, switchyard,'nit; 2 cooling tower, batch plant, and west; landfill areas.

Plant roads were being paved and earth work had started at the new emergency center near the west property line. The con-struction of Unit 1 was approximately 87$ complete, and that; of Unit; 2 was 60$ complete. The work involved mostly mechanical and electrical installation within the main buildings, earth-moving at the emergency center and west landfill areas, and form setting and concrete pouring of t;he Unit 2 cooling t;ower. The work force was about 23/ less than last year. The number of machine operators, electricians, iron workers, pipe fitters, carpenters, and laborers was about 3000 on the day shift and approximately 450 on the evening shift. Little or no noisy outside work was performed on the evening and night shifts.

Host effort was concentrated in t;he turbine-generator and react;or buildings as the power systems were being installed and tested. Ten-wheel trucks were used to haul earth to the western

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Report No. 3024A-5 Bolt Beranek and Newman Inc.

end of the site. The batch plant produced concrete for Che Unit; 2 cooling tower. Plant roads were graded and paved using dozers, rollers, graders, paving equipment and trucks. Earth moving at the emergency center included Che use of a sheeps foot roller, a dozer, a scraper, and trucks. Xn the switchyard some erection and earth work was underway. The work force of 3450 people represented about a 235 reduction from the August 1979 level of 4500 people. Sound levels measured near Che site, locations 2-5, increased several. decibels due Co Che earth work associated with Che emergency center.

The weather remained stable during the site visit; no precipitation or high winds were observed. The skies were generally clear or partly cloudy. Daytime temperatures were between 55 F and 70oF. At night the temperatures were less, about 45 F Co 50oF. The wind speeds were less Chan 10 mph.

The measurement locations near the site are illustrated in Fig. 1; the locations for additional ambient measurements more distant from Che site are shown in Fig. 2. The progress of SSES construction is shown in Fig. 3, a photograph taken on 31 July 1980.

Table I lists the measurement instruments employed during the site visit and includes their respective dates of calibra-tion. The field measurement and calibration techniques were similar to Chose of previous visits; these procedures are described in BBN Report; 3024.

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2. SOUND LEVEL MEASUREMENTS NEAR THE SSES SITE The median sound pressure levels observed at locations 2 Co 5 near Che site are illustrated in Figs. 4 through 7. These figures also compare these data with sound pressure levels obtained during previous years of site construction and pre-construction activity. Tabulations of Che sound pressure level statistical data obtained at these nearby locations and several locations within five miles of Che site appear in Appendix G.

Xt should be noted Chat Che data presented in Appendix G include local sound contributors, such as crickets and other insects, in addition Co Che distant sounds of traffic, aircraft, and SSES construction.

At locations 2 to 5 shown in Fig. 1, construction. sounds were generally audible. The construction sound sources included cranes, cherry pickers, trucks, dosers, loaders, scrapers, rollers, equipment backup alarms, the paging system, and hand Cool operations such as hammering.

The median sound pressure levels presented in Fig. 4 for location 2 increased from August 1979 to October 1980. The median A-weighted sound level was 53 dB(A) for Che October 1980 measurements, compared to the August 1979 value of 48 dB(A).

Earthmoving equipment in the nearby emergency center area caused this increase.

Figure 5 illustrates Che median sound pressure levels obtained at location 3. Construction sounds were barely audible here last year because of the sound attenuation provided by a nearby ridge and because most construction work was indoors.

During this trip the sound levels had increased due Co work at Che emergency center.

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At location 4, near the south property line of the site in the Bell Bend Community, the median sound level was 47 dB(A).

This level is 2 dB greater than in August 1979. The sound level data for this location are presented in Fig. 6.

Figure 7 exhibits the sound level data for" location 5, a-position to the east across the Susquehanna River. The median sound level of 45 dB(A) was influenced by many community sounds, including birds and traffic on Rte. 11 and Rte. 239, in addition to the engines, backup alarms, and pages associated with the construction project;. Since construction began, the measured median sound levels have ranged between 42 and 47 dB(A) at this location. A summary of the median construction sound levels

is given for the above locations in Table II.

The measurement team visited location 7 several times during the October 1980 trip. This location, which is approxi-mately one mile to the northwest of the site, is well shielded by an intervening ridge. Noise produced by local farm sources and by earthmoving equipment on the west side of the SSES site was audible at this location.

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i"': L-~i FIG. 1. MAP OF GENERAL AREA NEAR THE SSES SITE SH01IING SOUND LEVEL MEASUREMENT LOCATIONS AND SITE PROPERTY LINE.

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c 0 2 3 MILES FIG. 2. MAP OF AREA WITHIN FIVE MILES OF SSES SITE SHOWING DISTANT AMBIENT SOUND LEVEL MEASUREMENT LOCATIONS AND SITE PROPERTY LINES.

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FIG. 3. PHOTOGRAPH OF CONSTRUCTION OF MAIN STATION COMPLEX TAKEN ON 31 JULY 1980.

VIEW LOOKING TO THE SOUTH.

BBN Job No. 139056 March 1981

I Report No. 3024A-5 Bolt Beranek and Newman Inc.

80 1974 CONSTRUCTION 1975 CONSTRUCTION 70 0 1976 CONSTRUCTION 1978 CONSTRUCTION 5 1979 CONSTRUCTION

< 60 0 1980 CONSTRUCTION CV C)

C) 0 PRECONSTRUCTION AMBIENT o 1972, 1973, 1974 O,

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FIG. 4. MEDIAI'I, AMBIENT AND 1974-1976, AND 1978-1980 CONSTRUCTION SOUND PRESSURE LEVELS OBTAINED AT LOCATION 2.

BBN Job No. 139056 March 1981

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80 1974 CONSTRUCTION 1975 CONSTRUCTION 0 1976 CONSTRUCTION 1978 CONSTRUCTION 1979 CONSTRUCTION

+60 0 1980 CONSTRUCTION 0 PRECONSTRUCTION AMBIENT 1972, 1973, 1974 F

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FIG. 5. MEDIAN AMBIENT, AND 1974-1976, AND 1978-1980 CONSTRUCTION SOUND PRESSURE LEVELS OBTAINED AT LOCATION 3.

BBN Job No. 139056 March 1981'

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80 1974 CONSTRUCTION 1975 CONSTRUCTION 70 0 1976 CONSTRUCTION 1978 CONSTRUCTION

%979 CONSTRUCTION 5 60 0 1980 CONSTRUCTION 8 0 PRECONSTRUCTION AMBIENT 8 1972, 1973, 1974 P

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FIG. 6. MEDIAN AMBIENT, AND 1974-1976, AND 1978-1980 CONSTRUCTION SOUND PRESSURE LEVELS OBTAINED AT LOCATION 4.

BBN Job No. 139056 March 1981 10

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80 1974 CONSTRUCTION 1975 CONSTRUCTION 70 0 1976 CONSTRUCTION 1978 CONSTRUCTION 1979 CONSTRUCTION Q 60 0 1980 CONSTRUCTION C4 CI C) 0 PRECONSTRUCTION AMBIENT Cl 1972, 1973, 1974 C)

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FIG. 7. MEDIAN AMBIENT, AND 1974-1976, AND 1978-1980 CONSTRUCTION SOUND PRESSURE LEVELS OBTAINED AT LOCATION 5.

BBN Job No. 139056 March 1981 11

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TABLE 1. LIST OF INSTRUMENTS USED DURING TRIP SHOWING DATES OF LABORATORY CALIBRATION Date Serial Date of Calibration of Trip Type* Make> Model Number Befo're Trip After Trip 10-6-80 SLM BK 2203 112881 8-18-80 12-3-80 OBF BK 1613 151339 8-18-80 12-3-80 PC BK 4220 274218 8-19-80 12-3-80 to 10-10-80 TR KN B-61-1107 9-24-80 1-5-81

• SLM Sound Level Meter OBF Octave Band Filter PC Pistonphone Calibrator TR Tape Recorder i BK Bruel and Kjaer Kudelski Nagra KN

Report No. 3024A-5 Bolt Beranek and Newman Inc.

TABLE II.

SUMMARY

OF MEDIAN SOUND LEVEL MEASUREMENTS, dBA Location Preconstruction 30 29 32 35 31 (1972 and 1973)

Construction (Site Preparation) 39 54 47 37 1974 Construction (Steel Erection/ 40 33 40 42 Concrete Pouring) 1975 Construction (Steel Erection/ 47 35 47 '43 35*

Cooling Tower Concrete Pouring) 1976 Construction (Steel Erection/ 43 44(31)i. 50 46 36 Machinery Installation) 1978 Construction (Machinery Installation/ 48 31 45 43 Cooling Tower Concrete Pouring) 1979 Construction (Machinery Installation 5 Startup Test/ Emer- 53 38 47 45 42 gency Building Site Preparation) 1980

• No construction activity audible.

t(N) Sound level without local housing construction.

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APPENDIX G OCTOBER 1980 CONSTRUCTION SOUND PRESSURE LEVELS (dB re: 0.0002 i~bar)

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TAPE RECORDED DATA (Statistical Analysis)

LEGEND aircraft birds ba backup alarms on mobile equipment cs chain saw dog(s) barking eng gas and diesel engine equipment h helicopter(s) hm hammer insects and crickets lawnmower p page system local traffic t(a) site access road traffic t(ll) traffic on U.S. Route ll tra tractor trn train wind in brush and Crees 99%

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90$ percent; of sample period 505 sound level was exceeded 10$

5A 1g Note: Sound pressure level data presented in appendix include a ma)or contributor, insects and crickets, in addition to the construction activity.

LOCATION 1 No data G-2

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LOCATION 2 6 October 1980 14:16 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 57 50 43 42 26 38 63 48 95% 59 52 45 43 44 38 26 40 64 49 90% 60 53 47 44 45 39 26 40 64 50 50% 64 57 48 48 42 28 43 66 10% 66 59 56 52 52 46 45 68 56 5% 67 59 57 53 47 45 68 56 1% 68 60 59 55 57 52 37 47 69 59 sound sources: aj b, cs, en@,

7 October 1980 09:57 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 59 47 40 39 40 34 27 46 63 49 95 0/ 61 50 43 41 42 37 28 47 65 49 90% 63 51 44 43 43 38 29 47 66 50 50% 68 54 50 48 47 30 50 69 53 10% 71 58 54 51 45 33 51 72 55 5% 72 59 55 52 52 45 34 72 56 1% 73 62 57 55 48 40 51 73 59 sound sources: ba, en@, i, t 7 October 1981 22: 33 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 49 39 38 36 34 26 57 36 95% 49 40 38 37 34 27 58 37 90% 50 40 38 37 34 27 58 37 50% 51 42 39 39 36 29 58 39 10% 55 53 50 44 40 1? 61 42 5% 56 55 53 45 41 32 18 62 43 1% 57 58 55 46 43 21 18 63 .45 sound sources: p, t (11)

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LOCATION 2 (continued) 8 October 1980 15:43 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 60 49 42 42 42 40 34 32 66 47 95% 61 50 44 42 43 41 35 33 66 48 90% 62 51 44 44 41 36 33 67 49 50% 66 56 49 48 47 43 40 37 70 51 10% 69 58 53 53 51 47 44 40 74 55

-5% 70 59 54 53 51 49 46 42 75 56 1% 71 61 56 53 50 48 44 79 57 sound sources: en@, W 9 October 1980 11:02 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 61 46 46 46 40 30 .36 66 49 95% 61 54 47 47 47 41 32 36 67 50 90% 62 47 48 48 42 32 37 67 50% 64 58 51 52 52 45 35 38 69 54 10% 67 62 55 56 55 48 39 39 58 5% 69 62 61 59 57 49 41 40 72 59 1% 71 64 64 62 59 51 42 41 73 61 sound sources: b, ba, en@, hm, 9 October 1980 14:38 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 59 54 48 49 48 40 27 33 66 95% 61 49 51 50 42 28 67 52 90% 62 56 51 52 50 42 29 35 67 53 50% 68 59 56 56 54 46 37 70 57 10% 71 62 61 61 59 50 37 38 61 5% 72 63 62 63 59 51 38 38 73 62 1% 64 64 64 61 52 40 39 74 64 sound sources: ba, eng,

Report No. 3024A-5 Bol t Beranek "and Newman Inc.

LOCATION 3 6 October 1980 14:51 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 40 33 34 28 27 25 27 28 45 95% 41 34 35 28 27 25 27 29 46 90% 34 35 28 27 26 28 29 46 36 50% 45 36 36 31 29 27 29 32 50 38 10% 63 61 55 48 40 31 33 68 52 5% 67 68 58 51 42 32 33 34 74 55 1% 71 72 61 55 47 36 36 34 76 58 sound sources: a, b, eng, h 7 October 1980 09.23 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 46 37 35 28 26 25 26 34 95% 47 38 36 28 26 25 25 27 51 35 90% 48 39 36 29 27 25 25 27 52 35 50% 50 42 39 32 28 26 27 29 54 37 10% 54 47 40 31 27 29 31 58 44 5% 55 57 52 43 34 28 30 31 61 48 1% 66 59 50 39 3o 30 35 66 sound sources: a, b, en@,

7 October 1980 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 47 38 27 23 57 27 95% 47 38 28 23 57 28 90% 48 39 38 28 23 28 50% 49 41 39 30 25 17 57 30 10% 49 44 38 32 23 17 59 35 5% 52 51 46 40 34 25 18 .18 59 38 1% 53 53 47 39 30 21 20 60 40 sound sources: a, t(11)

Report No. 3024A-5 Bo1t Beranek and Newman Inc.

LOCATION 3 (continued) 8 October 1980 16:26 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 43 37 31 32 31 27 28 48 36 95% 44 38 31 32 31 2? 28 19 49 3V 90% 44 38 32 32 32 28 28 19 49 3V 50% 47 41 -

33 30 30 21 52 39 10% 52 45 37 36 34 32 27 59 32 5% 56 55 47 38 38 35 33 29 61 44 1% 60 57 53 41 40 39 36 32 64 48 sound sources: a, b, en@, t(11), w 9 October 1980 11:29 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 48 41 34 31 31 31 29 29 53 39 95% 50 43 35 32 32 32 29 29 54 39 90% 51 44 35 32 33 32 30 29 40 50% 54 48 38 36 36 35 33 31 5V 43 10% 59 55 44 39 40 40 36 33 61 46 5% 60 56 46 40 41 37 62 46 1% 62 59 51 44 43 43 38 35 63 48 sound sources: a> bp ip lp t(11), w 9 October 1980 14:l2 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 29 26 25 23 24 27 45 33 95%

90%

50%

40 40 42 35 36 39 30 30 32 26 27 31 26'6 25 29 25 29 26 2'6 29 28 28 39 46 46 48 34 34 37 10% 48 49 39 39 34 32 55 5% 51 55 46 39 35 35 34 58 47 1% 57 60 54 50 46 42 39 37 63 53 sound sources: a, b, en@, P> t(ll), w

Report No. 3024A-5 Bolt Beranek and Newman Inc.

LOCATION 4 6 October 1980 13:55 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 52 44 39 37 36 29 27 44 59 45 95% 53 45 40 38 37 31 27 44 59 46 90% 46 40 39 38 31 27 45 60 47 50% 56 48 42 41 41 34 28 47 61 49 10% 61 52 47 46 46 39 30 49 64 51 5% 63 53 49 48 48 49 66 52 1% 69 55 51 50 51 45 50 70 54 sound sources: b, ba, en@, hm, p, t(a) 7 October 1980 10:30 Octave Band Center Frequency (Hz) 63 125 .250 500 1000 2000 4000 8000 OA dBA 99% 53 47 41 38 37 31 26 35 59 43 95% 54 48 42 39 37 32 26 36 60 43 90% 54 48 42 40 38 32 27 37 60 44 50% 57 52 45 42 40 34 28 42 62 47 10% 60 58 54 48 45 38 32 44 66 51 62 63 56 51 46 40 32 44 68 53 5%

1% 66 jl 62 56 50 46 36 45 60 sound sources: a, b, ba, en@, hm, t(a) 7 October 1980 23:O6 Octave Band Center Frequency (Hz) 63 125 250 500 1000 20 00 4000 8000 OA dBA 99% 49 43 39 34 30 22 57 95% 50 43 39 35 32 23 58 35 90% 50 44 40 36 32 58 35 50% 54 47 42 39 36 26 60 39 10% 60 45 44 18 64 44 5% 65 57 46 46 43 33 20 18 67 45 1% 70 61 48 45 35 27 21 71 46 sound sources: a, t(11)

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LOCATION 4 (continued) 8 October 1980 15:10 Octave Band Center Frequency (Hz) 63 125 250 '00 1000 2000 4000 8000 OA dBA 99%o 54 49 43 42 40 35 28 36 62 44 9.5% 55 50 43 43 41 35 29 37 63 45 90% 55 50 44 44 41 36 30 37 64 45 50%o 58 52 46 45 43 38 32 38 69 46 10% 63 56 49 48 45 40 35 39 74 49 5% 65 57 49 48 46 41 36 39 76 50 1% 69 59 53 52 50 44 37 40 79 53 sound sources: ao b, ba, eng, i, p, t(a), t(11), w 9 October 1980 10:33 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 55 51 44 44 43 35 25 31 63 46 95% 56 52 46 45 43 36 32 64 46 90% 57 53 46 44 36 25 33 64 47 50% 59 56 48. 47 45 38 27 34 67 48 10% 62 60 51 50 47 40 28 35 69 50 5% 63 61 52 51 48 41 29 36 70 50 1% 66 63 54 53 49 44 36 71 52 sound sour ces: ao ba, eng, hm, p> w 9 October 1980 15: 06 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 55 49 43 41 40 30 23 35 62 42 95% 55 50 44 42 40 31 23 35 63 43 90% 56 51 44 43 41 31 24 35 63 43 50% 59 53 44 36 65 10% 62 56 50 46 46 37 27 37 66 48 5% 63 57 47 47 38 28 37 67 49 1% 65 60 54 48 49 41 37 69 51 sound sources: a b, ba, eng, i, p, t(a), w

Report No. 3024A-5 Bol t Beranek and Newman Inc.

LOCAT ION 5 6 October 1980 15:50 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 46 39 38 35 27 28 36 43 95% 48 43 39 39 35 28 28 37 43 90% 49 44 40 39 36 28 28 37 54 44 50% 53 49 42 41 38 33 30 40 57 45 10% 59 55 48 46 45 42 35 42 63 50 5% 63 59 51 47 44 37 42 65 52 1% 74 68 62 52 52 49 41 43 76 59 sound sources: a, b, i, t, trn 7 October 1980 13:02 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 49 46 40 38 36 27 26 46 55 47 95% 50 47 41 39 37 29 26 46 48 90% 50 47 42 . 40 38 29 27 47 56 48 50% 53 52 45 43 40 34 38 48 58 49 10% 61 62 53 48 47 44 35 50 66 54 5% 67 66 56 51 50 47 38 50 72 56 1% 74 75 63 56 53 51 46 50 77 61 sound sources: en@, t, t(a) 9 October 1980 09.42 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 49 44 37 36 34 27 20 31 53 39 95% 99 45 37 37 28 21 32 54 40 90% 50 46 38 37 35 29 23 32 41 50% 54 49 42 41 34 27 34 57 44 10% 61 60 51 46 47 44 34 36 65 5% 68 63 56 50 49 45 35 37 70 55 1% 73 66 64 54 53 51 43 37 74 60 sound sources: a, b, en@, p, t, t(11) trna w G-9

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LOCATION 5 (continued) 9 October 1980 16:40 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99$ 40 38 33 32 29 25 27 32 37 958 42 39 34 33 30 27 27 33 48 38 90$ 42 40 35 33 31 28 28 33 49 50$ 46 39 36 35 32 30 35 42 10$ 57 57 44 43, 41 33 37 62 49 5$ 59 60 54 47 44 43 35 38 64 51 lg 67 64 59 50 48 45 37 38 68 54 sound sources: a, b, i, t, t(ll), w G-10

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LOCAT ION 7 10 October 1980 09:46 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 995 54 51 42 37 28 19 58 40 95$ 54 52 42 37 29 20 58 41 90$ 55 52 43 37 29 '22 59 41 50% 57 54 45 39 32 ~

27 21 60 42 10$ 61 63 49 37 36 29 19 65 48 5$ 63 64 50 43 40 38 31 21 66 49 lg 64 65 53 48 45 41 35 25 67 50 Sound sources: b, ba, d, en@, i, tra

Report No. 3024A-5 Bolt Beranek and Newman Inc.

LOCATION A 9 October 1980 20:20 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 36 32 27 19 42 26 95% 37 32 27 20 19 43 26 90% 38 33 27 20 19 43 27 50% 39 35 28 21 21 20 19 45 28 10% 45 40 32 28 24 23 22 20 49 5% 47 43 40 26 24 23 21 36 1% 50 47 44 35 36 28 26 25 53 39 sound sources: W LOCATION B No Data Construction Noise Audible.

LOCAT ION C 9 October 1980 17:24 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA dBA 99% 40 34 29 25 25 23 24 20 45 95% 30 26 26 24 24 20 47 90% 42 38 31 26 27 25 25 21 48 50% 56 49 34 31 29 28 24 58 39 10% 61 51 43 41 38 34 29 64 48 5% 62 60 56 48 47 42 37 32 65 52 1% 63 64 61 54 54 48 42 37 67 59 sound sources: a, b, d, i, 1, t, tra, w G-12

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LOCATION 0 9 October 1980 18:22 Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 OA I dBA 99% 44 34 28 23 21 29 95%

90%

50%

10%

45 50 68 36 37 44 28 29 31 37 25 30 36 22 23 28 34 20 22 30 18 22

'8 20 48 48 52 69 30 30 35 5% 69 54 40 38 37 32 25 21 69 1% 69 63 47 42 40 29 23 69 49 sound sources: a, d, LOCATION E 9 October 1980 19:51 Octave Band Center Frequency (Hz) 63 125 250 500 000 2000 4000 8000 OA dBA 99% 33 28 27 24 21 40 28 95% 33 29 28 25 21 40 28 90% 34 29 28 25 22 19 41 29 50% 35 31 29 26 23 19 21 20 30 10% 38 35 30 29 25 22 24 25 44 5% 38 36 32 30 25 27 45 33 1% 45 40 36 33 30 28 25 30 49 36 sound sources: d, G-13