The Arshot/HMMH study is a plan that describes sound abatement measures necessary to achieve the included goals;
From the HMMH study;
The study involved the measurement of existing noise levels in noise-sensitive areas surrounding the site, modeling of predicted racing noise levels during an expected loud hour of racing, evaluation of the noise requirements in the City of Columbus noise ordinance, and development of noise abatement measures for the race track to ensure substantial compliance with the ordinance.
and;
5.1 Noise modeling goal
A primary goal of the noise modeling process was to develop feasible noise abatement measures on the Cooper Park race track property that would allow racing to occur without exceeding the City’s noise ordinance to any significant degree. As a result, several noise barrier configurations were evaluated
during the modeling process. A particular challenge to achieving the City’s noise limits is the south property line with the Green Lawn Cemetery, which is relatively close to the proposed track. However,
with a tall double-barrier system, the City’s noise limits can be achieved.
The purpose of the Arshot study is obviously not intended to justify something that already exists, it's goal is to suggest and create effective sound abatement measures (a plan) for this project. That's an important point that some choose to disregard - it's a proactive action. Once this was presented to Arshot it was up to them to decide whether or not they wanted to commit the investment necessary to comply with the measures. It's been suggested before, but never has a race track developer committed to completely encircling a track with a wall of this extent - until Arshot chose to follow those recommendations. Basically, they said, OK, we'll spend the money to make it work. And as Schottenstien stated during the first SWAC meeting, he has no desire or intention to continually fight with anyone. So they will do it right from the beginning.
The bottom line is that both sound consultants agree that if the racing noise levels inside the walls are as described in the HMMH study, (plan) then the noise levels outside the walls will meet the city regulations in all but an extremely limited area. Those extremely limited areas are already beyond the city regulations due to the freeway. They actually agree.
As you are a Franklinton Commissioner, I would suggest that you sit down with Arshot representatives to ask these questions directly. I'm sure they would welcome the opportunity to answer your questions/concerns.
Sorry for the long post.