EIS 450
ABO19111
Illawarra Coke Company: environmental impact statement coke
shipment assembly area Port Kembla outer harbour P sw DEPT PRIMARY iUSTR1ES
ABO1 9111
Coal Development Sefvices Pty. Limited 1- c37 I I I I I
I 1 T F I
I I I I I ILIAWARRA COKE COMPANY
I ENV!RONMENTAL IMPACT STATEMENT COKE SHIPMENT ASSEMBLY AREA PORT KEMBLA OUTER HARBOUR
r I ' I I
I EPPS AND ASSOCIATES JUNE 1984 I FORM 4 J ENVIRONMENTAL PLANNING AND ASSESSMENT ACT, 1979 (SECTION 77(3)(d) ENVIRONMENTAL IMPACT STATEMENT
Li This Statement has been prepared by or on behalf of ILLAWARRA COKE COMPANY being the applicant making the development I application referred to below. The Statement accompanies the development application made in respect of the development described as follows:-
I (Intermittent Use) I 1.5 ha of land for foundry coke shipment assembly and preparation; use of portable screening plant and diesel alternator; I use of front end loader; use of motor lorries carrying coke and loading I containers.
The development application relates to the land described as I follows: I Locality/suburb Port Kembla Outer Harbour Real property description Maritime Services Board land I off Old Port Road, Adjacent to No 6 Jetty.
The contents of this statement, as required by clause 34 of the I Environmental planning and Assessment Regulation, 1980, are set forth in the accompanying pages. I Name, Qualifications and Janet Epps, B.Sc, M.Environ. Stud. Address of person who 3 Julian Street I prepared Environmental MOSMAN NSW 2088 Impact Statement I CERTIFICATE
I, JANET EPPS of EPPS AND ASSOCIATES I hereby certify that I have prepared the contents of this Statement in accordance with clauses 34 and 35 of the I Environmental Planning and Assessment Regulations, 1980.
I ~Ti tu- re I Pate I SUMMARY
Illawarra Coke Company proposes to use a site of about l.Sha adjacent to No. 6 Jetty at Port Kernbla Outer Harbour for short period.s to screen and assemble foundry coke consignments at intermittent intervals.
The average size of each shipment of foundry coke will be 3,000 tonnes (t) and shipments will be despatched at 8 to 10 week intervals. During each shipment the assembly area will be used for 3 or 4 days.
The proposed site is located within an industrial area zoned for Port uses, approximately 500rn from a coke handling and stockpile area owned by Australian Iron and Steel Pty Ltd.
The coke shipment assembly, screening and despatch operation at the Outer Harbour is defined as a designated development in terms of Schedule 30) of the Regulation of the Environmental Planning and Assessment Act, 1979. I I CONTENTS PAGE I Page No I 1.0 Background Information 2.0 The Proposal
I 3.0 Details of the Screening Plant and its Operation
I 4.0 Characteristics and Economic Significance of Foundry Coke I 5.0 Alternative Options 5.1 Alternative Shipment Assembly Sites 7. 1 5.2 Alternative Transport Routes 9, 6.0 Existing Environment 10. I 6.1 Land Use and Zoning 10. 6.2 Physical Characteristics 10. 6.3 Meteorology 6.4 Socio-economic Characteristics I 6.5 Acoustic Environment 11. I 7.0 Assessment of Environmental Impact 12. 7.1 Noise 12. 7.2 Dust 13. I 7.3 Water Quality 14. 7.4 Visual Impact is. 7.5 Waste Disposal 15. 7.6 Transportation 15. I 7.7 Cumulative Impact is. I 8.0 Authorities Contacted 16.
I ppendix 1 Noise Impact Statement Appendix 2 Correspondence from Maritime I Services Board I I I I I 1.0 BACKGROUND INFORMATION
Illawarra Coke Co Pty Limited has recently won contracts for I export sales of foundry coke at the rate of 20,000 t per annum. The coke is to be supplied at a minimum sizing of I 100mm and contracts contain penalties against the inclusion of undersize metallurgical coke.
I Foundry coke is screened to the required sizing during production, however it is prone to breakage during loading I and transportation. To overcome this problem, a portable screening plant has been constructed to separate undersize I coke from export consignments immediately prior to loading into containers.
The portable coke screening plant has Development Approval to operate at the Port Kembla Inner Harbour. I Shipment of large foundry coke from the old coal loader at I the Inner Harbour has been tried and found to be undesirable as size degradation occurs over the conventional conveying systems. Only smaller metallurgical coke can be I successfully handled at that location. I I i I I I I I I I 2.0 THE PROPOSAL It is proposed to load foundry coke into export vessels at I the No. 6 Jetty of the Port Kembla Outer Harbour. To accommodate the fragile nature of the foundry coke it is I proposed to screen and containerise the material at the last opportunity before ship loading. The Maritime Services I Board has advised that a vacant site adjacent to the No. 6 Jetty could be used for this purpose and proposes to enter an agreement to lease the site to the Company. The site is I shown on orthophoto plan Figure 1 and Plate A.
I To ensure absolute adherence to contract specifications, it is proposed to screen the foundry coke both at the cokeworks I and at the shipment assembly area. The portable screening plant will be transported to the Outer Harbour as required I to carry out this operation. It is envisaged that between 15,000 t and 30,000 t per annum I of foundry coke will be exported on an indefinite basis. The average size of each shipment would be 3,000 t and the I frequency of shipments every 8 to 10 weeks. During each shipment, the assembly area would be utilized I for 3 to 4 days. The operation would entail delivery of about 5,000 t to the area, screening the foundry coke into I containers for vessel loading and removal of undersize metallurgical coke from the area.
I Figure 2 shows details of the proposed shipment assembly area.
The sequence of oDerations for shipment assembly and loading of foundry coke into export vessels is listed as follows:
(1) Trucks will deliver coke from production plants at Coalcliff and Corrimal. A front end loader, will push the coke into stockpiles ensuring minimum damage is caused to the coke sizing. A maximum I I - \,, — — — — — — —
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I FOUNDRY COKE SHIPMENT ASSEMBLY OPERATION
I SCALE 500 I HG. 2 3
Li height of 3 metres is proposed for the stockpiles. About 250 truck deliveries will be required for I each shipment. The coke will be screened using the portable I screening plant (Plate B) and the sized coke will be loaded into containers.
I The containers will be transported to the berth (Plate C) and the coke carefully discharged from k the containers into the ship's hold.
The undersize material will be trucked to the Company's metallurgical coke stockpile at the Inner Harbour. About 90 truck loads of undersize I material are expected to be generated.
A 24 hour operation is proposed, however on occasions this could be reduced to a 7a.m. to 11p.m. operation. Six people will be required for the operation, excluding drivers making deliveries from the cokeworks. Deliveries from the cokeworks will be carried out on day shift only.
It is proposed that coke shipments be assembled, prepared and despatched from the nominated area adjacent to No. 6 Jetty during the loading of export vessels. The nominated area is located within SOOm of the existing Australian Iron and Steel Pty Ltd coke stockpiling operations (Plate D).
I The site would require some preparation to remove undergrowth and rubbish. The company will undertake this work and suitably landscape the site. Species proposed for landscaping purposes have been chosen for their hardy and I wind-borne salt tolerant characteristics. The bund wail will be covered with topsoil available on the site, seeded with Buffalo and Couch grass and planted with Westringia I fruticosa, Banksia serrata, Leptospermuni laevigatum, Acaci.a I longifolia and Coprosma baueri. I - ------
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COKE CONTAINERS BEING TRANSPORTED I AND UNLOADED I I I I I I I I I I I PLATE C ------I 4
I During the operation one front end loader will be used in conjunction with 3 trucks carrying containers to the No. 6 I Jetty. No fixed plant, equipment or building would be required. The portable screening plant would be removed on I completion of the loading of each shipment.
The loading of containers onto ships is a procedure already I covered by appropriate approvals administered by the I Maritime Services Board. Although an indefinite operation is proposed, should the I site no longer be required for the purpose proposed, the Company would ensure that the site was cleaned of any coke I and left in a tidy condition. I I I I I I I I I I I I I I 3.0 DETAILS OF THE SCREENING PLANT AND ITS OPERATION A photograph showing the arrangement of the portable I screening plant is shown in Plate B. Overall dimensions are:
I Length - 37.08m Width - 5,80m I Height - 10.23m
I The plant comprises a loading hopper discharging onto a 1500mm wide conveyor belt which delivers the coke to a I double-deck vibrating screen. The three size fractions separated by the screen are delivered to a chute and two underflow hoppers. The chute and hoppers are fitted with I clam shell gates and are designed to load out into trucks or I containers. A mobile diesel alternator is provided for power supply; it is rated at 62kVa and is internally and externally soundproof ed.
I The screening plant is designed for dismantling into five sub-assemblies which can be transported by three trucks.
I Operation of the plant will involve a rubber-tyred front end loader delivering coke to the loading hopper. Screened I products will be loaded from the chute and underfiow hoppers into trucks of 22 tonnes capacity or containers of 12 •tonnes I capacity.
Up to 45 trucks can be loaded each day. The loading tiire I for each truck will be slightly less than S minutes.
I Coke throughput of the plant is rated as 300 t/hour. I I
I 6.
4.0 CHARACTERISTICS AND PCflNOMTC ST(ThTT1TrM..Trc flP PflTTMPY I COKE
I Foundry Coke is used in industrial furnaces where high temperatures are required. Its value is enhanced if it is I charged into the furnace in large particles. Considerable care must be taken in the handling process to avoid breakage of the fragile coke structure and retain the large I particles.
I Coke is produced from South Coast hard coking coal. It is a refined product utilising local labour to increase the
I economic value of the raw material and hence adding to the value of the Australian export market.
I The Australian coal and coke industry, and the South Coast industry in particular is currently experiencing a very I difficult export market which is expected to continue in the short to medium term.
I The export market is highly competitive and in order to survive, the Company's product must be produced and handled I at the minimum possible cost.
If export markets are lost, jobs become vulnerable I throughout the Company's coal mining and coke production operations. The Company currently employs about 1500 people I associated with the mines and 90 people associated with the coke works. I
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I 5.0 ALTERNATIVE OPTIONS
I 5.1 ALTERNATIVE SHIPMENT ASSEMBLY SITES
Several alternative sites for coke assembly have been I considered by the Company. All these sites have the disadvantage of product degradation caused by extra road I haulage and double handling. The prohl em increases with the distance involved. I The sites with some potential are shown on Figure 3 and discussed below. I
Port Kembla Inner Harbour; Existing Facility. I Small coke is currently loaded from this location. Large foundry coke, however, suffers size I degradation when loaded by the conventional conveyor system and the system does not incorporate I facilities to remove undersize metallurgical coke. Instead of the 3 truck operation proposal, 8 trucks I would be required to load containers onto the ship. The Maritime Services Board will, at a future date, k be using the site for extensions to Stage II of the Coal Loader.
H Port Kembla Inner Harbour; west of the Coal Loader. This site, close to the Western Stockpile, I is currently being used for coke stockpiling but is soon to be developed as a new grain terminal.
I Australian Iron and Steel Ptv Ltd's - coke stockpile site. Coke is currently handled f r om I this site near the proposed shipment area. fliffi culties associated with use of this site I iricl ude:
Need to obtain Australian Iron and Steel's I concurrence (as the property owner); Possibility of contamination of shipments; I Potential difficulties in security of tenure and operations when land belongs to a I competitor in the marketplace. pit
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. LAKE -- N- ILLA WAR n 7 - 1 km I 4. South Coast Equipment's Kemblawarra site. The site, 5km from No. 6 Jetty, is currently being I proposed as a stockpiling site for gypsum and metallurgical coke now being handled from the Inner Harbour, An alternative area will be required when construction of the new Grain Handling Terminal commences on the existing stockpile site.
The Kemblawarra site may be suitable as a I replacement for the Inner Harbour stockpile, but it is not considered by the Company to adequately meet the needs of shipment assembly of the foundry coke.
A significant disadvantage to the Company using the I site for ship assembly purposes only, is the additional transport cost. Instead of the 3 truck I operation proposed, 8 trucks would be required to load containers onto the ship. The operation would not be able to sustain the additional cost and remain economic.
Some degradation of the finally screened coke could be expected in transit to the shipside. In I addition to this, a 24 hour ship loading operation would not be permissible as truck transport would be limited to daylight hours. Extra demurrage costs, as well as extra transport costs would be incurred. I The impact of transport associated with the operation would be greater if this alternative was adopted. The added impact, affecting the I residential areas along the truck route, would seem an unnecessary impact compared to the favourable situation with the preferred site. I S. The Cokeworks. This option is not preferred as the I coke degradation incurred, the overall cost and the haulage impact would be considerably increased. I I I I Transporting the containers of foundry coke rather than a truck load would require a greater number of I truck trips adding additional cost and additional trucks on public roads. Operations at the I cokeworks and trucking in particular, can only take place in daylight hours. Loading vessels would I take considerably longer without the 24 hour operation, greatly increasing demurrage costs (by I perhaps 2 to 3 times).
Coke degradation due to transport would be I maximised if this option were adopted.
I 5.2 ALTERNATIVE TRANSPORT ROUTES I The proposed route is shown on Figure 4. It is the only feasible route using industrial areas already subject to heavy vehicle use. Alternative routes would have a I greater impact on central Wollongong and residential I areas. I I U I I I I I I I
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I 6.0 EXISTING ENVIRONMENT
6.1 LAND USE AND ZONING I The Local Environmental Plan for the locality designates the proposed shipment assembly area as Special Uses "A" I allowing Port uses with consent of council.
Areas of industrial land zoned 4(b) Heavy Industrial flank the site to the north, south and southwest. Significant industrial developments within 500m of the site include a railway line, goods yard and railway station, a disused power station, Australian Iron and I Steel's steelworks, tank farms, Commonwealth Rolling Mills, No 6 Jetty and a sub-station.
6.2 PHYSICAL CHARACTERISTICS
The site is adjacent to the Port Kembla Outer Harbour. It is located on level, partly reclaimed land bounded to the east along most of its length by a sea wall and the to west by the railway line. I To the south of the site a drainage line discharges to I the ocean.
No. 6 Jetty is located just to the north of the site. I The land is in a derelict condition with obvious remains of past industrial use (Plate E). I Bitou bush is the only significant vegetation on the site. I I I I h - ------
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I Dominant prevailing winds in the area are as follows: I Summer : - north easterly (slight to moderate) occasional southerlies (strong). Winter : - southerly to south-westerly (moderate). I Autumn - westerly (strong to very strong).
I 6.4 SOCIO-ECONOMIC CHARACTERISTICS
I The presently derelict site is located 3/4km from the nearest residences, separated by heavy industrial areas.
I The Port Kembla Harbour Task Force has been actively seeking industrial developments for underused or vacant I land in the Port area to increase use of the port and improve employment prospects. The Maritime Services I Board has consequently been supportive of the Companys proposal to use vacant land for the purposes of shipment k assembly of a new export commodity (i.e. foundry coke). The site has no potential for archaeological site I preservation as it is partly reclaimed area bounded by a sea wall, and has been used over many decades for port I uses, including coal and coke shipping.
6.5 ACOUSTIC ENVIRONMENT
Ambient noise levels were measured at the nearest residential area to the assembly site, i.e. the northern I end of Wentworth Street, Port Kembla. Two readings were • made using a Metrosonic Community Noise Analyser.
At 2107-2119 on the 22nd May 1984, with a light NW breeze the Lq (background) noise level was 50 dB(A).
At 0247-0257 on the 30th 14ay 1984 under a very light NW breeze, the L90 level was 47 dB(A). I For further details of ambient noise levels see Appendix I 1. 12. I 7.0 ASSESSMENT OF ENVIRONMENTAL IMPACT I 7.1 NOISE
P Sources of noise from the portable screening plant will I be: coke being tipped into the loading hopper I the vibrating screen the chute discharging large coke the screen underfiow hoppers I coke discharging into truck bodies Li the diesel alternator
Sound-proofin g 11 materials will be used on the loading I hopper, chute and underflow hoppers to reduce the noise I of coke being dropped. The noise from truck loading will be of short duration until the truck bodies are partly filled, and will be no I greater than noise from truck loading at existing P plants. Sound-proofing of the diesel alternator will reduce its I noise output to less than 70 dB(A) at7m. The estimated noise level at 21m would be 76 dB(A). To I reduce the noise emission level to the lowest measured L90 level at the nearest residences (47 dB(A)), an acoustic barrier will be constructed (See Figure 5 and Appendix 1).
I The overall noise emission from the portable screening plant will be less than that produced from existing I plants which comply with statutory requirements. Furthermore the assembly area is located within a heavy I industrial area adjacent to the steelworks and other heavy industries, 3/4 km from the nearest residences. I I 2187E.- 4k' 0,' t/'OA/ De7&e4//1J A/8/J ATTEU/AT/O(/ UT4/AJ 'x1'e L Nf',4'Adê' "
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It is not considered that a temperature inversion would have any effect on the perceived noise level in the residential area due to the nature of the sources of the 1,90 noise levels in the area.
A temperature inversion could cause an increase in the perceived level from the screening operation of 5-10 dB, (ref Woods). However, the L90 level in the area is primarily caused by the presence of 24 hour, daily operation heavy industry. Therefore, any increase in the perceived level from the screening operation will be balanced by an increase in the 1,90 level caused by the effect of the temperature inversion on the perceived noise emission from the numerous plants that give rise to the measured L90 level.
It would be expected that, during periods of temperature inversion, the relativity between the 1,90 level and the perceived noise emission from the screening plant would be maintained. At no time, therefore, should the maximum noise emission from the screening operation exceed the L90 level.
7.2 DUST
The portable screening plant will not generate dust since the product being processed has been extensively washed and has the finer particle sizes (-6mm) removed in the existing screening plant at the cokeworks. The coke is prone to breakage during loading and transportation, but this produces minimal dust because the large coke pieces are brittle and do not abrade.
To ensure dust is not generated from the roadwayor in particulary windy conditions, a water cart will be available to be used as required. The strongest winds in the area (westerlies) would in any case blow any dust directly out to sea. 14.
I The temporary nature of operations and the aspects I discussed above will result in a minimal effect on air quality in the area. I 7.3 WATER QUALITY
I Coke products are not expected to generate pollution due to the absence of fine material.
To ensure no contaminated water leaves the site a 2m high bund wall of stabilised, vegetated washery waste I will be constructed along the site boundaries. Drainage on the site will be directed to a settling pond before U discharge to the adjacent waterway. Sewage will be removed by truck from a portable sanitary facility.
Construction of the bund wall, operation of the settling pond and the short duration of stockpiling and screening I operations will ensure water discharge from the site is I of acceptable quality.
74 r 5TjALJ IMPACT
The short duration of shipment preparation (3 to 4 days) I and the intermittent nature of the operation (every 8 to 10 weeks) mean the site will change little from the existing situation. I All equipment will be removed from the site when the shipment is completed.
I The scale of the screening plant operation (lOni in height) will be dwarfed by surrounding buildings and I industrial developments. An overall improvement to the visual effect of the area can be expected by removing the rubbish currently on the site and landscaping the bund walls surrounding the site.
I No residential areas or public vantage points will experience a visual impact from the operation.
I 15.
7.5 WASTE DISPOSAL
Smaller metallurgical coke produced by the screening operation will be removed by truck to the Coinpanv's metallurgical coke stockpile. Every effort will be made to recover the maximum volume of coke in view of its market value.
7.6 TRANSPORTATION
Truck movements will only occur along routes currently I used f o r haulage of coal and coke and other heavy vehicle transport. These routes are major thoroughfares I and the number of additional trucks (about 200 round truck trips over 3 to 4 days for each shipment) will not I create a significant impact.
HTrucking on public thoroughfares will be limited to I daylight hours only.
7.7 CUMTJLATIVE IMPACT
I The small scale of the operation and its intermittent nature will contribute very little to the overall pollution levels of the area.
Every effort will be made to ensure that air and water I discharges are of an acceptable nature. I Any contribution the operation will make to the cumulative effect of heavy vehicle traffic will be very temporary and only occur intermittently. I I I r I I I 16.
I 8.0 AUTHORITIES CONTACTED
I The following authorities have been contacted in regard to the proposal:
I State Pollution Control Commission Wollongong City Council I Maritime Services Board.
I Correspondence from the Maritime Services Board in support of the proposal is included in Appendix 2. I I I I I I I I I I I I I I I P.O. Box 256, HITEMP INSULATION Unanderra, N.S.W., Australia. 2526. Phone: (042) 61 3782 (ncorporate in NS.WJ
NOISE IMPACT STATEMENT
I Prepared for: Coal Development Services Pty Ltd Lawrence Hargrave Drive I COALCLIFT Attention: Mr N Jarissom I By: PITEMP INSULATION I S COPE
This statement has been prepared to examine the likely noise impact I of operating a coke screening plant near the PW2 coal loading jetty at Port Rerrbla. The statement provides an estimation of the effect the plant will have on residences in the Port Kembla area and measures II to reduce the noise emission to an acceptable level. I PLANT OPERAT:l It is expected that the plant will be required to operate on a twenty I four hour basis on any day of the year. The plant will be positioned on land leased by the Company, the closest I point of which is 514 metres to the nearest residence. NOISE MEASUPENENTS
I Noise measurements of the screening plant were made usinz:
Bruel & Kjaer 2209 Sound Level Meter I Nagra IV-SJ tape recorder Peccrdings were laboratory processed usinz: I Spectral Dynamics Peal. Time Analyser
Measurements of the ambient noise levels were made usinc:
Metrosonics Community Noise Analyser
I In all cases, e2'Jipment was calibrated inmedamelv prlor to measurement, us:n a Bruel & Pljaer L230 calibrator. I I I 2.
I RE S U L TN
I 1. Noise emission from screening plant. I The screening plant is a portable unit comprising Hopper for loading unscreened coke onto I Belt for transporting coke to Screen which separates coke into
I Two hoppers for undersized & middling coke, and
V. Chute for delivery of oversize coke to truck mounted I bin. This screen has been previously examined to determine noise emission and its effect at various distances, a copy of this I report is enclosed.
This report indicates that at 500 metres, the calculated I noise effect of the loaded screen is 47 dN(A). The screen while unloaded at a position 500 meters distance from the unit is calculated to be 35 dB(A).
I These calculated levels would, of course, be lower at eI metres from the proposed site of the plant to the position I of the nearest residence. I 2. Noise emission fr-on the oversize coe bin. The oversize material is to be fed from the screen to a truck— mounted bin. When loaded, the bin will be transported to the ship for loading. The impacts of the coke into this bin I are the source of the highest noise levels in this process.
To determine the effect of this part of the process, the I noise emitted was recorded and processed through a real time analyser. The maximum level in each octave hand during the I screening process was noted under two conditions which were: bin empty -
ban par: faIled (ie, danced a- creviously screened I materia I I I I I Becordincs were made at 17 metres distance from the bin.
Octave Band Centre Frequency (Hz)
Operation Wght 63 125 250 500 1K 2K 4K O'all
Bin Empty Lin 91.1 96.2 94.8 98.3 96,8 96.9 67.2 1D2.9
Bin Damped Lin 84.0 84.4 85.1 09.3 59.0 86.7 79.6 3?.4
Propogation analysis was conducted using the following criteria:
Source to measurement position 17 m
Source to receiver position 614 m
Source height 2.5 m
Beceiver height (est elevation) 4.0 m
Humidity 80%
Temperature 18 0 C
Operation Wght 63 125 250 500 1K 2K 4K Call
Bin Empty A 29,2 44.6 50.7 59.5 60.7 60.0 43.3 65.1
Bin Empty Lin 55.7 60.7 59.3 62.7 50.7 58,8 22.3 67.9
Bin Damped A 22.1 32.8 41.0 50.5 52.9 49.8 35.7 56.2
Bin Damped Lin 48.6 48.9 49.6 53.7 52.9 48.6 34.7 58.7
3. Noise emission from front end loader:
The typical level of noise emission from a front end loader of the type to be used in this operation (CAT 966C) measured at 8 metres is 82 db(A). The anticipated level of such a unit at 614 metres is 43 dB(A). I
I 4.
I SUMAPY OF NOISE SOURCES (as calculated at 614 metres) Screening plant General running level 35d5(.A) I Loaded (screening level) Coie bin Initial impacts into empty bin 65.1dP(A) I Into partially filled bin 56.2d5(A) I Front end loader 43dB(A) 4. Ambient noise levels at residential area:
I Ambient noise levels were measured at the northern end of Wentworth Street, Port Kembla. Two readings were made: I Time: 2107 - 2119 12 minutes sample time Date: 22nd May 1984
I Wind: Light NW breeze I L1 67dB(A) L.,. 61d8(A) I L0 5OdB(A) L 70dB(A) ma>: I Time: 0247 0257 10 minutes sample time I Date: 30th May 1982 Wind: V. light NW breeze I 61d8(A' 5OdP(A) I L I These levels would be typical of this area and are not 1iely to he Lover at any time since the primary contributor to one a'-::ent levels s the heavy industry in the area vhich I onerates on a twenty four hour, every day, basis. I I I I NOISE ATTENUATION
The maximum calculated noise level of each noise source, other than the impacts of the oversize coke into the bin, does not exceed the lowest measured ar)level at the nearest residential position.
To reduce the emission of the bin impacts to the lowest measured L00 level, a barrier will he constructed.
The barrier will have the following specifications:
Barrier height - from ground level to 3.0 metres above bin top level.
Barrier width - an effective distance of 3.0 metres from either end of the bin.
Transmission loss of barrier will be no less than 25dBA.
A barrier of this construction will cause a drop in the noise level at the residence to,
Octave Band Centre Frequency (Hz)
01 1 63 125 250 500 1K 2K al
Lin 46.4 49.3 45.5 '6.4 4 2.1 38.3 20.4 53.7 dB(A) 19.9 33.2 36,9 43,2 42.1 39.5 21.4 7.3
Materials for barrier construction will be 3.0 mm galvanized steel or similar and will be stiffened at a minimum of 1.4 metre intervals.
Some concern has been expressed concerning the effect that a temmerature inversion may have on the perceived noise level in the residen:ia area. Such concern is without foundation due to the nature of the sources of the L90 noise levels in the area.
A temperature inversion could cause an increase in the perceived level from the screening operation of 5-10 dB, (ref Woods. However, tne level in the area is primarily caused by the presence of 2 hod3, daily operation heavy industr.-. Therefore, any increase in the perceived level from the screerInc, operation will be balanced by an increase in the L level caused by the effect of the temperature inversion on the perceiOèd noise emission from the numerous plants trat give rise to the measured leve 6.
It would be expected that, during periods of temperature inversion, the relativity between the L level and the perceived noise emission from the screening plant wouN be maintained. At no time, therefore, should the maximum noise emission from the screening operation exceed the L00 level.
HITEMP INSULATION
Barry howard I
P.O. Box 256, Unanderra, NS.W., Austra!ia. 2526. Phone: (042) 61 3782
NOISE IMPACT STATEMENT
I S PREPARED FOR: I Corrimal Coke Works Pty. Ltd. Railway Street CORRIMAL N.S.W. 2518
I BY:
HITEMP INSULATION
SCOPE:
The purpose of this statement is to determine whether the operation of the portable screening plant located at the above premises creates excessive noise at nearby residential sites.
Further noise abatement measures to be installed will be discussed.
I NTRODUCT ION:
The screening plant will not be operated on the above site outside the hours of 7.00 a.m. and 5.00 p.m.
The plant will not be used on Saturdays, Sundays or Public Holidays.
The plant will not be operated closer than 150 metres from any residence at any time.
NOISE MEASUREMENTS:
Measurements were made using a BRUEL & KVAER 2209 sound level meter, fitted with an octave band pass filter (Type 1613).
The unit was calibrated (immediately prior to measurements being taken) with a 4230 Calibrator.
Measurements were niadeat a convenient location in direct sight of the entire plant. No obstructions were between the plant and the nieasUrinQ I position. I Distances were measured with a TOPCON split-image range finder. I I RESULTS:
Four octave band measurements were made of the plant under different I condi tions
(1) Hoppers unlined, screen empty. I Hoppers unlined, screen loaded. Hoppers lined, screen empty. (4) Hoppers lined, screen loaded.
I All measurements were made on dB(A) fast response. I The attached table of noise measurements shOws the measured levels under the above four Conditions as well as predicted levels for various distances from the plant.
I. The distances for which predictions have been made are as follows:-
100 metres. I 200 metres. 500 metres.
The calculation method is based on that presented in the German Noise Standard V.D.I. 2714.
The calculations were carried out by computer program with the I following assumptions:-
Humidity - 90%. I Ambient Temperature - 21 C. Source Heights - 6 metres. Receiver Height - 2 metres. I Line of site source to receiver. No built up area between source and receiver.
Additionally, the measured levels at 21 metres have been extrapOlated to provide levels of the plant, as a point source at 1 metre.
Cope screening plant, 1 metre, as point source.
OCTAVE BAND CENTRE FREg. (Hz) SOURCE LIN A 63 125 250 500 1k 2k 4k I Empty, not lined 107 99 105 98 93 98 94 88 80 Loaded, not lined 116 114 109 105 105 108 109 108 101 Empty, lined 104 96 102 94 94 92 91 89 81 I Loaded, lined 110 105 104 104 99 104 101 97 92 I I - 2 - I I uI
I RESULTS: (Continued)
I These figures show a 9 dB(A) overall drop in Sound emission was achieved when the plant is loaded, by internally lining the hoppers with Conveyor belt rubber. This has Substantially reduced the primary noise source, i.e., I the impact in the chutes and hoppers leaving the screen as a possible cause of excessive noise emission.
I Occasional impacts in the oversize chute after internal lining reached 82point. dB(A) at 21 metres which could equate to 61 dB(A) at the 200 metre
I Further treatment of this section is necessary. I CONCLUSION: The plant prior to any noise reduction treatment, caused a predicted I noise level of 66 dB(A) at a point 200 metres distance from the plant. The hoppers, lined with conveyor belting rubber, now contributes comparatively little, to the noise emission. A significant drop of I 8 dB(A) at the 200 metre point to 58 dB(A) has been realised.
It is anticipated that by treatment of the noise emitted from the I screen a further 8 dB(A) will be achieved, resulting in an overall noise level from the plant of 50 dB(A) at the 200 metre point. I RECOMMENDATION: The vibrating screen should be fully enclosed with a tubular steel frame I stiffened with cross mnbers at 500 m (max.) distance. The frame will carry a marine ply shell of minimum 20 rrni thickness.
All joints are to be sealed with a mastic material or rubber sealed.
The shell is to be internally coated with a Sound absorbent material (open cell foam, fibreglass or acoustic tile) which will be covered I with Mylar or similar, to protect against dust penetration
The shell is to be isolated from the plant by means of rubber or similar I material in order to reduce vibration.
Further treatment of the oversize chute and hopper is desirable to I reduce the Possibility of occasionally high level impact noise emission.
This may constitute a Sandwich layer of 50 mm polyurethane between the I rubber and steel shell. Alternatively an external lining of Open cell foam or fibreglass with an outer cladding of I - 2 mm steel srleetjno i may be used. I I I I TABLE OF MEASURED AND CALCULATED NOISE LEVELS
NOISE SOURCE & POSITION p OCTPVE BPND CENTRE FREQ.(Hz) I NR 63 125 250 500 1k 2k 4k 8k A. SCREEN PRIOR TO TREATMENT I 2 3 (1) Screen_Empty 14 @ 21 metres 82 72 79 72 67 r72 68 62 54 ** @ 100 metres _67 58 65 58 53 58 54 48 39 ** @ 200 metres 60 52 58 51 46 51 47 40 30 ** @ 500 metres 49 41 48 41 35 40 36 29 18 -
(2) Screen Loaded * @ 21 metres 97 88 83 79 79 82 83 82 75 ** @ 100 metres 75 73 69 65 65 68 69 68 60 ** @ 200 metres 68 66 62 58 58 61 62 60 51 ** @ 500 metres______58 54 52 48 47 50 51 49 :39
B. SCREEN AFTER HOPPERS LINED
L wcreen Empty *@ 21 metres 83 70 76 68 68 66 65 1 63 55 ** @ibo metres 64 56 62 54 54 52 51 49 40 - ** @ 200 metres 57 481 55 47 47 45 44 41 31 - I 7 ** - @ 500 metres 47 35 45 37 L 4 i9 --
(2) Screen Loaded * @21metres 88 79 78 68 73 78 75 71 66 ** @100metres 70 65 64 64 59 64 61 57 51 I ** @200 metres 63 58 57 57 52 57 54 49 42 ** @500 metres _____ 53 47 47 47 41 4t643 38 30 The Manager, Illawarra Coke CompanT Pt. Ltd., Private B a g No. 2, THIRROUL N. S. W. 2515 84/1 2056 WS:LS 9 March 1984 Dear Sir, Proposed Foundry Coke Shipment Assembly Area - Outer Harbour, Port Kembla
Irefer to your Jter of 17 January 1984 (ref.160.i2.2 J4W5793) and have to advise that the Board wouLd have no objection to the use by your Company of an area of land near the base of the old No. I Jetty, Outer Harbour, Port Kembla, for periodic stockpiling operations, as described in your letter. The matter is, however, one in respect of which Wollongon City Council should exercise development control and consider environ- mental matiers in terms of Part IV of the Environmental Planning and Assessment Act, and the Board's aoproval is subject to all requirements of Council, in this connection, being satisfied. in the event of Council's approval to the proposed operations being obtained, it will he necessary for your Company to enter into a license to cover the occupation of Board's land, and ints regard, a license fee of $20 per wee ill be payaDle, pLs $75 per aay or part tcereof, on which the area is actually occupied by material.
Yours faithfully,
T. C. PAGE Secretary.
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