Table 1.2 – Main Construction Works Carried out in the Reporting Period

April 2022

May 2022

June 2022

·  Demolition of FST no. 5-6 by excavator mounted crusher;

·  Demolition of Auxiliary Pumping Station (above ground);

·  Pre-drill work at A. tank by 1 rig;

·  Pre-drill work at Air Flotation Thickener and Sludge Digestion Tank by 3 rigs;

·  Installation of sheet pile at IW & PST;

·  Piling work at PST;

·  Drilling and installation of dewatering well and observation well at IW & PST;

·  ELS works at IW & PST;

·  ELS work at Zone 2B;

·  Pipe laying for Zone 3 diversion;

·  Zone 3 Diversion works:

a.    Temp. Gravity thickening tank – Pipe laying and E&M installation work;

b.   Temp. Sludge Holding Tank – Pipe laying and E&M installation work;

c.    Temp. Water heater house – Pipe laying and E&M installation work;

d.   Temp. Primary Sludge Pumping Station – Sheet piling work;

e.   Temp. Digested sludge pump – ELS Work;

f.     Digested Sludge Pumping Station house – Pipe laying and E&M installation work;

·  Demolition works at Sha Tin Treatment Plant;

·  Demolition of Sludge Holding Tank no. 3 & 4;

·  Foundation works at CLP substation;

·  Foundation works at MIC office;

·  Env. Drill holes inside Air Flotation Thickener; and

·  Disposal of construction waste as indicated in Appendix F.

·  Pre-drill work at A.tank by 1 rig;

·  Pre-drill work at Air Flotation Thickener and Sludge Digestion Tank by 3 rigs;

·  Installation of sheet pile at IW & PST;

·  Piling work at PST;

·  Drilling and installation of dewatering well and observation well at IW & PST;

·  ELS works at IW & PST;

·  Pipe laying for Zone 3 diversion;

·  Zone 3 Diversion works:

a.      Temp. Gravity thickening tank – Pipe laying and E&M installation work;

b.      Temp. Sludge Holding Tank – Pipe laying and E&M installation work;

c.       Temp. Water heater house – Pipe laying and E&M installation work;

d.      Temp. Primary Sludge Pumping Station – ELS work;

e.      Temp. Digested sludge pump / Supernatant Pumping – ELS Work;

f.       Ferrie Chloride and Chemical Dosing System – R.C. works;

g.      Digested Sludge Pumping Station house – Pipe laying and E&M installation work;

·  Demolition of Sludge Holding Tank no. 3;

·  Foundation works at CLP substation;

·  Installation of MIC unit at MIC office;

·  Backfill work at FST no. 5-8;

·  ELS works at Zone 2B; and

·  Disposal of construction waste as indicated in Appendix F.

·  Sludge Digestion Tank by 1 rigs;

·  Installation of sheet pile at IW & PST;

·  Piling work at PST;

·  Piling work at Transformer House;

·  Drilling and installation of dewatering well and observation well at IW & PST;

·  ELS works at IW & PST;

·  Pipe laying for Zone 3 diversion;

·  Zone 3 Diversion works:

a.      Temp. Gravity thickening tank – Pipe laying and E&M installation work;

b.      Temp. Sludge Holding Tank – Pipe laying and E&M installation work;

c.       Temp. Water heater house – Pipe laying and E&M installation work;

d.      Temp. Primary Sludge Pumping Station – ELS work;

e.      Temp. Digested sludge pump / Supernatant Pumping – ELS Work;

f.       Ferrie Chloride and Chemical Dosing System – R.C. works;

g.      Digested Sludge Pumping Station house – Pipe laying and E&M installation work;

·  Demolition of Sludge Holding Tank no. 1, 3 & 4;

·  Foundation works at CLP substation;

·  Installation of MIC unit at MIC office;

·  Backfill work at FST no. 5-8;

·  Backfill work at A. Tank 6-8;

·  Construction of RC chamber at Zone 2B;

·  Disposal of Pond Sediment excavated from PST; and

·  Disposal of construction waste as indicated in Appendix F.