Calculation of the Mass Flow The particulate mass MPT (g/test) shall be calculated as follows: PT where: Mf = particulate mass sampled over the cycle (mg) MTOTW = total mass of diluted exhaust gas over the cycle as determined in section 2.2.1 (kg) MSAM = mass of diluted exhaust gas taken from the dilution tunnel for collecting particulates (kg) and, Mf = Mf,p + Mf,b , if weighed separately (mg) Mf,p = particulate mass collected on the primary filter (mg) Mf,b = particulate mass collected on the back-up filter (mg) If a double dilution system is used, the mass of the secondary dilution air shall be subtracted from the total mass of the do ...[+++]uble diluted exhaust gas sampled through the particulate filters.

The secondary dilution system must provide sufficient secondary dilution air to maintain the doubly-diluted exhaust stream at a temperature of less than or equal to 325 K (52°C) immediately before the primary particulate filter.

When using double dilution, a sample from the dilution tunnel is transferred to the secondary dilution tunnel where it is further diluted, and then passed through the sampling filters (section 1.2.2, Figure 15).

NOTE: For double dilution operation, sample flow is the net difference between the flow rate through the sample filters and the secondary dilution airflow rate.

When muddy water is stirred up by the construction, the current takes this muddy water away from the construction area, and the silt curtain redirects the muddy water back to the lake bed, where the muddy water settles quicker (1005) The curtain is supposed to reduce the impact of the muddy water they have outside the construction area.

The rooms they stay in have double beds and televisions like in a hotel.