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)  
12 Jun 2019 Stream 1 7.5 8.2 2.1 2.4 3 4 1.2 0.04 0.03  
Stream 2 7.5 8.1 1.2 2.2 2 3 1.2 0.05 0.03
Stream 3 7.4 8.5 1.4 2.5 2 4 1.2 0.13 0.02  
21 Jun 2019 Stream 1 7.9 8.1 0.3 <1.0 3 3 0.6 0.03 0.02  
Stream 2 7.9 8.3 0.4 <1.0 2 2 0.6 0.04 0.02
Stream 3 7.9 8.1 0.3 <1.0 2 2 0.6 0.03 0.02