W hen not to w orry about fugitive PM 1 0 Short tem construction - - PDF document
Fugitive PM 1 0 John W atterson John W atterson ( w ith thanks to John Abbott) ( w ith thanks to John Abbott) W hats in this presentation Guidance Monitoring Modelling Case studies of modelling 1 W hen not to w orry
– Ideally monitor for 1 year with 90%
– minimum 6 months is being advised
– 3 months will often do (but consider
– objective unlikely to be exceeded – even if model accuracy only within 50%
– time consuming – costly – and the data ‘seems reasonable’
PM10 concentrations (µ µ µ µg m-3 TEOM), without any QC, from fugitive emissions from a quarry
250 500 Mar-99 Jun-99 Sep-99 Dec-99 Mar-00 Jun-00
Time PM10 concentration (µ µ µ µg m-3)
400 m Met. Working face - area of maximum activity PM10 PM10 PM10 sampler Met. meteorological station
– Operated by The National Environm ental Technology Centre – Telephone 01 235 46 3 35 6 – Em ail aqm .helpline@aeat.co.uk w eb site w w w .aeat.co.uk/ netcen/ airqual/ w elcom e.htm l
– Operated by Stanger Science and Environm ent – Telephone 018 1 2 56 4 972 – Em ail m odelhelp@stanger.co.uk – w eb site w w w .stanger.co.uk
help desk – http:/ / w w w .uw e.ac.uk/ aqm / review – check the FAQ bit
Correct m onitoring to support assessm ent
Ratify the data
"
screen !
"
scale !
"
review Ratify the data
"
screen !
"
scale !
"
review Ensure
"
cost effective m onitoring
"
at the correct locations ( public exposure)
"
"
equipm ent m aintained & calibrated Ensure
"
cost effective m onitoring
"
at the correct locations ( public exposure)
"
"
equipm ent m aintained & calibrated Take tim e to analyse data and present in a useful form Take tim e to analyse data and present in a useful form Use to help validate the m odelling and define areas of exceedence Use to help validate the m odelling and define areas of exceedence
( w ith thanks Bob W ade, form erly King's Lynn & W est Norfolk Borough Council)
– Local Authority wishes to build housing close to a railway – but there are several sources of fugitive PM10 close to the railway line (aggregate delivered by railway) – how close could they build the houses without exceeding the most stringent PM10
– Loading of aggregate onto storage piles (batch or continuous drop operations); – Equipment traffic in storage area; – Wind erosion of pile surfaces and ground areas around piles; – Loadout of aggregate for shipment or for return to the process stream (batch or continuous drop operations
28500 28550 28600 28650 28700 28750 28800 28850 28900 Easting, m 38600 38650 38700 38750 38800 38850 38900 38950 39000 39050 39100 Northing, m
Wet batching plant Aggregate pile Aggregate pile ‘Topmix’ dry batching plant Roadstone coating plant Three sided aggregate storage Railway lines Bottom drop feed hopper Ideal monitor location ACTUAL monitor location
– to concentrations at receptor locations spaced on a regular grid – extending approximately 500 m from the goods yards – with grid nodes at 50 m intervals.
30 degrees
Airport
Aggregates on that day
greater than that at the Rochester site
– continuous TEOM to validate the results of the model against
Daily average concentrations of PM10 recorded at the South Quay monitoring site 50 100 150 200 250 300 350 400 450 Jan-01 Feb-01 Mar-01 Apr-01 May-01 Jun-01 Jul-01
Date
Concentration of PM10 (µ µ µ µg/m3 gravimetric) South Quay loading Concentration PM10 (µg m-3 grav.) 24 hour objective
Suggested Air Quality Managem ent Area starting betw een the 3 6 µ µ µ µg m -3 and 4 4 µ µ µ µg m -3 contours
not lead to exceedences at relevant receptors
exceedences of the daily PM 1 0 objective unlikely
em issions
cost/ benefit for each of the abatem ent