CAHYA MATA SARAWAK SUSTAINABILITY REPORT 2015

22 CAHYA MATA SARAWAK SUSTAINABILITY REPORT 2015 Air Quality Results (µg/m 3 ) Location Total Suspended Particulate (µg/m 3 ) Readings Taken Quarry at Mile 7 207.15 Q4 2015 Quarry at Mile 9 ½ 102.85 Q4 2015 Gunung Sebanyis 43.95 Q4 2015 PPES Works (The Proposed Sarawak Museum Campus) A1 67.51 Q4 2015 A2 63.29 Q4 2015 A3 59.07 Q4 2015 A4 46.41 Q4 2015 A5 59.07 Q4 2015 CMS Clinker Waste Gas Stack 43.67 Annually Cooler Stack 37 Annually Coal Mill Stack 21.33 Annually Noise Monitoring Noise exceeding 85 decibel (dB) can cause annoyance to people. In the year under review, PPES Works (Sarawak) conducted noise level measurement at five sites near the Proposed Sarawak Museum Campus. A summary of the results taken around the vicinity of the project site in the fourth quarter of 2015 is presented below. Noise Monitoring at the Proposed Sarawak Museum Campus Location Point Minimum Level (dB) Maximum Level (dB) Average Level (dB) Within the project site N1 48.2 52.2 50.2 Near the commercial area N2 46.3 54.3 50.3 General Clinic N3 48.4 56.4 52.4 Merdeka Palace Hotel N4 52.3 58.3 55.3 RTM office N5 47.6 61.4 54.5 A summary of the noise results at three of CMS Quarries Sdn Bhd sites is presented below. The permissible noise level for day time is 65 d(B)A and for night time, 55 d(B)A. Noise from blasting is covered in our vibrations section. CMS Quarries Noise Monitoring Location 1H 2015 2H 2015 Day-time (d(B)A) Night-time (d(B)A) Day-time (d(B)A) Night-time (d(B)A) Quarry at Mile 7 56.3 52.7 * 57.5 52.6 Quarry at Mile 9 ½ 54 47.6 65.3 46.9 Gunung Sibanyis 59.2 41.6 7 - - Dust Emissions High levels of dust can be produced when cement is manufactured and handled. CMS Cement continuously focuses on controlling and reducing the levels of dust. Upgrading of coal mill system In 2013, we upgraded the coal mill system at CMS Cement. The previous coal mill was a ball mill type that was able to grind a maximum of 15 MT per hour. The new coal mill has a capacity of 22 MT per hour. The coal mill upgrades provided two benefits: lower specific power consumption and lower dust emissions. Baghouse Dust Collector In 2015, CMS Premix Sdn Bhd changed its pollution control system from a Venturi Scrubber to a Baghouse Dust Collector. The main advantages of the Baghouse Dust Collector are: • It does not require water to operate; • Dust is recycled back into the asphalt rather than the dust and water sludge being discharged to the sediment pond; and • It achieves zero emissions. Vibrations Monitoring Ground vibrations induced by blasting in quarries are one of the fundamental problems in the quarrying industry. Uncontrolled vibrations may cause severe damage to nearby utilities and pipelines. CMS Quarries monitors seismic vibrations when blasting in three directions at right angles to each other – radial, transverse and vertical. In 2015, our consultants took seismic and air vibrations measurements on 56 occasions. The minimum, average and maximum readings are presented below. CMS Quarries (Stabar Quarry) Vibrations Monitoring Channel/Measurement Average Radial Velocity (mm/s) 5.02 Transverse Velocity (mm/s) 5.38 Vertical Velocity (mm/s) 3.94 Air (dBL) 109.23 The permissible vibration guideline states that seismic vibrations must not exceed 5 mm/s and air vibrations should not exceed 128 dBL. However, these are a guideline and CMS Quarries’ true measure of vibrations is gauged by the number of complaints received. No complaints have been received for the past three years. Biodiversity Biodiversity may refer to the enriching of the natural world or to restoring or protecting habitats. During PPES Works (Sarawak)’s construction of the Golden Bridge across the Sarawak River which is on-going, site clearing was restricted to the bridge zone. Several measures were introduced to control water pollution, soil erosion and sedimentation. Bins were provided along the bridge and at its landing points. Buffer strips of undisturbed vegetation were also kept along the northern bank of the river. ENVIRONMENT