Agreement No. CE/59/2015 (EP)
Environmental Team for Tseung Kwan O - Lam Tin Tunnel - Design and Construction
Summary of Groundwater Quality Monitoring Results 
Date Location Parameters (unit)
pH Dissolved Oxygen (mg/L) Turbidity (NTU) SS (mg/L) BOD5 (mg O2/L) TOC (mg-TOC/L) Total Nitrogen (mg/L) NH3-N (mg NH3-N/L) Total Phosphorus (mg-P/L)
11 Jul 2019 Stream 1 8.0 8.3 1.8 1.8 <2 4 0.7 0.04 0.02
Stream 2 8.0 7.8 1.5 1.6 <2 2 0.7 0.04 0.02
Stream 3 7.9 8.4 1.3 1.8 <2 2 0.7 0.01 0.02
18 Jul 2019 Stream 1 8.1 8.0 1.5 1.7 2 3 0.6 0.02 0.02
Stream 2 7.8 7.8 0.9 <1.0 2 3 0.6 0.03 0.02
Stream 3 7.6 7.8 0.8 <1.0 2 3 0.6 0.01 0.02