Title: GOVERNMENT: POLICIES and LEGISLATION ON SUSTAINABLE DEVELOPMENT 8 APRIL 2004
1ASSALAMUALAIKUM
SELAMAT SEJAHTERA
GOOD AFTERNOON
JABATAN ALAM SEKITAR MALAYSIA
2Q-SHE CONFERENCE EXHIBITION (QUARRY SAFETY,
HEALTH ENVIRONMENT) FOR QUARRYING BUSINESS
ENHANCEMENT ENVIRONMENTAL REQUIREMENTS IN
QUARRY INDUSTRY 14 November 2006 Holiday Villa
Subang, Subang Jaya, Selangor
By Dr. Ir. SHAMSUDIN AB LATIF Deputy Director
General (Development) Department of Environment,
Malaysia
Department of Environment, Malaysia
3COVERAGE
- Environmental impacts
- Planning Stage
- Environmental Management and Mitigation
Measures - Maintenance, Monitoring and Record Keeping
- Conclusion
Department of Environment, Malaysia
4ENVIRONMENTAL IMPACTS OF QUARRIES
Department of Environment, Malaysia
5Environmental Impacts of Quarries
- Development stage
- Operational stage
- Post-closure stage
Department of Environment, Malaysia
6PLANNING STAGE
Department of Environment, Malaysia
7PUBLIC RELATION
- Good neighbor policy
- - Need to win support of neighboring
- community
Department of Environment, Malaysia
8- Practical ways of promoting good
- neighborly relationships
- Consultation with residents at the EIA stage
- Make available copies of non technical summary
- Dedicated staff member to handle complaints
- Make available environmental monitoring data
Department of Environment, Malaysia
9 SITING CONSIDERATIONS
- Sufficient buffer distance of (preferably) at
least 1000 meters from residential area
Department of Environment, Malaysia
10- Site selected to minimize
- Visual impact
- Dust
- Noise
- Pollution of water courses
Department of Environment, Malaysia
11- ENVIRONMENTAL IMPACT ASSESSMENT (EIA)
- Identify potential impacts
- Suggest mitigation measures
Department of Environment, Malaysia
12WRITTEN PERMISSION/APPROVAL
- Air pollution control
- Water pollution control
- Monitoring requirements
-
Department of Environment, Malaysia
13PLANNING CONSIDERATIONS FOR MITIGATING
ENVIRONMENTAL IMPACTS
- Site preparation
- Blasting
- Extraction
- Topsoil and overburden management
- Rehabilitation
- Processing
- Stockpiling
- Traffic
Department of Environment, Malaysia
14Site Preparation
- Activities
- - timber clearing
- - grubbing
- - top soil and overburden salvage
- Main aspects of concern
- - Soil erosion and sediment control
Department of Environment, Malaysia
15Blasting
- Blasting generates
- - vibration
- - audible noise
- - fly rock
- - dust
- Control
- - digital blasting using electronic detonators
Department of Environment, Malaysia
16Extraction
- Noise
- Visual concerns
- Dust
- Traffic
- Pollution prevention
- Erosion, sediment, storm water
- Rehabilitation
Department of Environment, Malaysia
17- Topsoil and Overburden Management
- Only clear area that will be actively used
for extraction, processing and stockpiling - in the near future
Department of Environment, Malaysia
18Rehabilitation
- Progressive rehabilitation is recommended
- - minimize topsoil and overburden handling
- - minimize the need for large storm water
management area - - prevent dust generation
Department of Environment, Malaysia
19- Processing
- Aggregate processing may include
- Crushers, screens, wash plants,
- generators, conveyors
- Concerns
- Noise, dust, visual impact, sediment, water,
wash-water fine
Department of Environment, Malaysia
20- Stockpiling
- Generates large quantity of stormwater
- Stormwater management dust control
- BMPs
- Chute drop height water sprays buffers
- on down wind of stockpiles stockpiles located
away from sensitive areas
Department of Environment, Malaysia
21- Traffic
- On-site traffic generates dust and noise
- Mitigation measures
- - aspects of haul road and industrial
- traffic
- - Entrance and exit designs
- - Weigh scale layout
Department of Environment, Malaysia
22ENVIRONMENTAL MANAGEMENTAND MITIGATION MEASURES
Department of Environment, Malaysia
23STORMWATER AND EROSION CONTROL
- Concerns Soil erosion and mud slides
- Best Management Practices (BMPs)
-
- Stabilization (Prevention)
- Structural (Treatment)
- Inspections
-
Department of Environment, Malaysia
24- Stabilization (Prevention)
- Bufferzone
- Bioengineering
- Ditches
- Erosion control blanket
- Tarp
- Vegetation cover
- Benching
- Hidroseeding
- Limit clearing
- Tree protection
-
Department of Environment, Malaysia
25- Structural (Treatment)
- Check dam
- Ditches
- Outlet protection
- Retention basin
- Settling pond
- Silt fence
- Swales
Department of Environment, Malaysia
26- Inspections
- Post-storm events
- Weekly
-
Department of Environment, Malaysia
27- Reference Document
- Manual Saliran Mesra Alam (MASMA)
- published by Drainage and Irrigation
- Department (DID) Malaysia
Department of Environment, Malaysia
28- Drilling
- Concerns Noise and dust
- Requires drilling plan
- Mitigation measures
- - Drilling machine
- dust extraction and collection
- - Drill hammers and engines
- Noise suppression
- - Drilling hours Restricted
Department of Environment, Malaysia
29- Blasting
- Concerns Vibration, air blast
- Standard
- Air blast over pressure 120dB (Lin Peak)
- Ground vibration Maximum 3 mm/s peak
- particle velocity (ppv)
- Mitigation measures
- - Use hydraulic rock breakers
- - Do not use surface detonating cord
- - Use electronic detonators
Department of Environment, Malaysia
30- Noise
- Activities
- - Drilling
- - Blasting
- - Earth moving operations
- - Crushing
- - Screening
Department of Environment, Malaysia
31- Standard At Quarry Boundary
- Should not exceed 5 10 dB(A)
- above normal day time ambient level
- Day time 65 dB(A)
- Night time 55 dB(A)
-
Department of Environment, Malaysia
32- Processing
- Enclosures around crushing and screening plants
- Solid barriers (bund walls and topographical
features) - Vegetation belt
- Maintain access and haul road to reduce truck
noise - Maintain lubricate machineries to reduce
machinery noise - Use silencers on compressors, rotary engines and
generators -
Department of Environment, Malaysia
33- Dust control
- Typically, low concentration of dust
- in respirable range (less then 3
- microns)
- Sources - from processes
- - from fugitive sources
-
Department of Environment, Malaysia
34- Dust Generating Points
- Drilling
- Blasting
- Loading of trucks
- Truck travel
- Fugitive dust loss from trucks
- Dumping onto primary crusher
- Primary, secondary, tertiary crushing
- Screening
- Transfer points on conveyor systems
- Loading onto storage piles from conveyors
- Windblown dust from stockpiles and open
conveyors -
Department of Environment, Malaysia
35- Mitigation Measures
- Some already discussed earlier
- Common approach
- - Wet suppression system
- - Dry collection system
-
Department of Environment, Malaysia
36Agglomerative Wet Suppression System -
Use atomizing nozzles - Water
spray pressures Exceeding
14 atm (200 psi)
Department of Environment, Malaysia
37- Wet Suppression System
- Applicable for both process and
- fugitive dust emission
- Efficiency Greater than 70
- Need to enclose dust generation
- sources
-
Department of Environment, Malaysia
38- Examples of Enclosure Types/Forms
- Transfer Points
- A head box with inlet strip curtain
- A seal on underside of feeder belt
- Tight chute with a rock box
- Tight skirt board for the entire length
- of the belt cover
- Strip curtain fitted at the front and back
discharges of the cover -
Department of Environment, Malaysia
39- Enclosure Types/Forms(cont.)
- Screens
- Preferably, totally enclosed
- If open, the feeder belt must be enclosed with
- a head box extending out over the deck and
distribution plate - A seal with rubber between deck and hopper
-
Department of Environment, Malaysia
40- Enclosure Types/Forms(cont.)
- Crushers
- Rock box or vault under crusher, with
- substantial volume
- If no vault, the receiving belt must be skirted
- Crusher month to be protected from wind by
- wind screen
-
Department of Environment, Malaysia
41- Enclosure Types/Forms(cont.)
- Dump pockets and hoppers
- Custom design enclosure
- Hopper top - use of solid sheet material/
- tarp fabric/wind fence material
- Baffles or turning vans
-
Department of Environment, Malaysia
42- DRY COLLECTION SYSTEM
- Advantage
- - More efficient
- Disadvantage
- - Capital intensive
- - Power consumptive
- - High maintenance
- - Applicable only to sources which can
- be enclosed
-
Department of Environment, Malaysia
43Dry collection system consist of -
Extraction system (hoods, ducting, fans) -
Bag house (filters filtration velocity)
Department of Environment, Malaysia
44- Drilling for blast charge
- Use wet suppression system
- or
- Hooding plus cyclone
-
Department of Environment, Malaysia
45- Crushing operation (primary, secondary, tertiary)
- Primary Crushers
- All crushers must be enclosed
- Wet suppression system (spray above and
- below crushers)
- Crushers can be inter-linked with water
- flow detectors
-
Department of Environment, Malaysia
46- Secondary Crushers
- Sources
- - transfer into crusher
- - crusher itself
- Dust control
- - enclosure
- - vent though bag house
-
Department of Environment, Malaysia
47- Screening and Material Transfer
- Sources
- - Screens
- - Transfer points
- - Load outs (from hoppers and
- conveyors)
- Dust control
- - enclosure
- - vent though bag house
-
Department of Environment, Malaysia
48- Conveying
- Control
- - Spraying with water or conditioning
- agents at or below discharge points
- from the conveyer
-
Department of Environment, Malaysia
49- Stockpiling
- Control
- - Storage bays
- - Covers
- - Water spraying (plus suppressants)
- - Reduce fall height
- - Use stone ladder
- - Limit height of stockpile
- - No open storage of material under 3 mm
- - Stockpile at sheltered points
- - Areas used by vehicles to be consolidated
- or kept wet
-
Department of Environment, Malaysia
50- Truck Out Areas
- (From quarry site to public roadways)
-
- Control
- Paving (minimum 30 m)
- Use wash station
-
Department of Environment, Malaysia
51MAINTENANCE/MONITORING AND RECORD KEEPING
Department of Environment, Malaysia
52- Visible emission monitoring
- Visible emission due to particle size range of
0.1 to 200 microns - Operator should monitor visible emission
- Visual observation indicates effectiveness of
dust control on site -
Department of Environment, Malaysia
53- Other Dust Monitoring Techniques
- Use simple dust deposition
- gages
-
Department of Environment, Malaysia
54Record Keeping of Visible Emission Monitoring
Keep a record of (in a log) - Visible
emission monitoring activity -
Corrective actions taken
Department of Environment, Malaysia
55Performance Monitoring of Air Pollution Control
System Performance monitoring and record
keeping requirement for bag filters to follow the
Guidance Document published by the DOE entitled
Technical Guidance Document Series Number
DOE APCS-II Technical Guidance on Performance
Monitoring of Air Pollution Control systems
Department of Environment, Malaysia
56- Performance Monitoring of
- Storm Water and Erosion
- Sediment Control Measures
- Inspection required
- To ensure continued performance of storm
- water and erosion control measures
-
- Visual inspection during general
- inspection round by quarry supervisor
-
Department of Environment, Malaysia
57- Storm Water and Erosion
- Sediment Control Measures
- Inspection frequency
- - Every 7 days or
- - within 24 hours after any storm event
- greater than 1 cm of rain per 24 hours
- period
-
- Sampling conducted during/after storm
- event
-
Department of Environment, Malaysia
58Record Keeping Keep a log of - Visual
inspection - Sampling activity -
Corrective actions
Department of Environment, Malaysia
59CONCLUSION
Department of Environment, Malaysia
60- CONCLUSION
- A need for a new and comprehensive approach to
environmental management in quarry industry in
Malaysia - Best management practices/best available
techniques are available to mitigate impacts to
acceptable levels - Hence quarries and other land users can co-exist
harmoniously -
Department of Environment, Malaysia
61THAT'S ALL
THANK YOU
Contact sham_at_doe.gov.my
Tel 03-88712046 Fax 03-88891039
Department of Environment, Malaysia