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10.1.1 This Environmental Monitoring and Audit (EM&A) report presents the EM&A works undertaken during the month from 1^st March 2007 to 28^th March 2007 in accordance with EM&A Manual which forms part of the EIA Report (Register No. AEIAR-018/1999).

10.1.2 A total of 36 sets of measurements for 1-hour TSP and 15 sets for 24-hour TSP monitoring were carried out at three monitoring locations during the reporting period and the results of all measurements taken were below the A/L Levels.

10.1.3 A total of 9 sets of L_eq₍_30min)measurement in daytime (i.e. 0700 to 1900 hours on normal weekdays) were carried out at three monitoring locations during the reporting period and no exceedances were recorded.

10.1.4 A total of 5 set of 6 x L_eq₍_5min)measurements during public holidays (i.e. 0700 to 1900 hours during public holiday) were carried out at the closest monitoring stations (NSR1, NSR2 and NSR3) during the reporting period and no exceedances were recorded.

10.1.5 No environmental complaints were received during the reporting period.

10.1.6 No notifications of summons or prosecution were received for this Contract since the commencement of construction.

10.1.7 ET and IEC audits were carried out in accordance with the EM&A Manual and deficiencies identified were mainly related to the provision of adequate treatment of construction run-off, regularly disposal of waste materials, and dust control for open stockpiles and exposed earth surface.

10.2 Recommendations

10.2.1 According to the environmental audits undertaken during the reporting period, the following recommendations have been made:

10.2.2 Construction Dust

i. better watering coverage should be provided at haul road and exposed areas to ensure the soil surface is in moist condition;

ii. water or dust suppression chemical should be sprayed continuously on the surface where any pneumatic or power – driven drilling, cutting, polishing or other dust emissive mechanical breaking operations was undertaking; and

open stockpiles of dusty material and demolished debris should be covered properly by tarpaulin or to spray with water to keep surface moist.

10.2.3 Construction Noise

i. numbers / types of plant operating in the restricted hour should follow the conditions of Construction Noise Permits;

ii. regular maintenance of machinery; and

iii. noisy equipment should be located away from nearby NSRs.

10.2.4 Water Quality

i. all construction wastewater and surface run-off should be diverted to appropriate water treatment facilities prior to discharge;

ii. de-silting facilities (sedimentation tanks/chemical treatment plants) should have adequate capacity for settling surface run-off;

iii. wheel washing facilities should be installed at all vehicular exits and used by all vehicles before leaving the construction site;

iv. surface run-off from the vehicular and plant servicing area should be diverted to the perimeter channels with petrol interceptor prior to discharge to storm drainage system;

v. site hoarding / concrete barriers should be tightly sealed at the bottom to prevent seepage of surface run-off from the site;

vi. accumulation of water in drip trays and at chemical/fuel storage area should be avoided; and

vii. complete temporary drainage systems on site in accordance with the approved Comprehensive Drainage Proposal.

10.2.5 Waste Management

i. oil / petrol contaminated soil should be collected and disposed of as chemical waste;

ii. all types of waste should be collected by licensed waste collectors;

iii. good housekeeping should be implemented throughout the whole construction period; and

iv. all dump trucks should be fully covered throughout the journey to off-loading destinations.

10.2.6 Anti-mosquito breeding

i. pondings and uneven ground should be filled up and leveled;

ii. construction plant and other items which may retain water should be covered or treated in appropriate manner; and

iii. all sedimentation tanks, sump/soakaway pits and other receptacles which may retain water should be sprayed with anti-mosquito repellent regularly.