MCU12/0184 - Late Submission - Emissions modelling and inversions - Cath Jones

Subject: MCU12/0184 - Late Submission - Emissions modelling and inversions
From: Jack Lewis
Date: 2015-10-19T01:28:49+00:00
To: Mailbox Council Mail

From: Cath Jones [mailto:[email protected]]
Sent: Sunday, 18 October 2015 8:14 AM
To: Jack Lewis
Subject: MCU12/0184 - Emissions modelling and Inversions

Dear Mr Lewis,
You may not be aware that surface temperature inversions occur throughout the year in the catchment valley where this proposed development is sited.
They can be fully formed by 10pm and not clear until 7-8am the next day. As the inversions begin to lift, they usually move NE towards the head of the valley.
The number of inversion events recorded in the valley between July and Oct 2015 were:
July - 10 events
Aug - 12
Sept - 10
to 19th Oct - 9
Attached are 2 photos of inversions taken from my property looking across the valley to the Cooroy-Belli Creek Rd.
Inversions concentrate emissions, delay dispersion and alter dispersion ranges and patterns. PAEHolmes has acknowledged that inversion breakup fumigation may cause excessively high concentrations and that there are no refined techniques to model this (Best Practice Guidance - Plume Dispersion Modelling and Meteorological Processing, May 2011).
Yours sincerely,
Cath Jones
68 Top Forestry Rd, Ridgewood