Table 2 Methods deployed in the determination of Gaseous Emissions and Noise
From: Environmental impact of quarrying on air quality in Ebonyi state, Nigeria
Parameters | Equipment | Averaging Time (h) | Range (ppm) | Alarm Level(s) |
|---|---|---|---|---|
PM10 | Riken Keiki PM10 monitor model NP-237H | 24 h | 0.1–200 ppm | + 0.1 |
NO2 | GASMAN NO2 Gas monitor model 19685H | 24 h | 0–10 ppm | 3.00 ppm |
CO | Handheld GASMAN CO Gas monitor model 19256 | 24 h | 0–50 ppm | 50 ppm |
H2S | GASMAN H2S Gas monitor model 19,770 | 24 h | 0–50 ppm | 10 ppm |
SO2 | Handheld SO2 Gas monitor Gasman model 19648H | 24 h | 0–10 ppm | 2.0 ppm |
Cl2 | Handheld Cl2 Gas monitor Gasman model 19812H | 24 h | 0–5 ppm | 0.5 ppm |
VOCs | Handheld PCE-VOC 1 Environmental VOCs Meter | 24 h | 0–200 ppm | - |
NH3 | Handheld NH3 Gas monitor Gasman model 19730H | 24 h | 0–50 ppm | 25 ppm |
HCN | Handheld HCN Gas monitor Gasman model 19,773 | 24 h | 0–25 ppm | 500 ppm |
NOISE | Handheld Noise dosimeter (TES sound level meter model TES 1350a) | 24 h | 90 dB(A) | - |