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APPROVED 5/10/2010 OC Board of Adjustment – 3/8/2010 Page 26 of 86 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 if you have ever experienced a speaking tube speaking through a cylindrical tube, it can carry sound so we had to treat that to reduce the sound coming out there. Nick Herman: Is this in the attic or the ventilation system? Noral D. Stewart: The ventilation system duct work, I believe extends up above the ceiling. In other words, there are openings in the ceiling to pull the air up into that duct work which is above the ceiling and exhaust out the end of the building. Nick Herman: Did you make any recommendations in connection with improving any doors? Noral D. Stewart: Yes. There is only one door that opens into the boarding area and it is on the opposite side of the building from the Southerland’s leading to that outdoor exercise area. It was a typical, not very strong door, and I notice the manufacturer they were using had an alternative door that was much better acoustically and I suggested they substitute that alternative door. Nick Herman: Did you understand that recommendation to be accepted? Noral D. Stewart: That is my understanding. Nick Herman: We have the improved windows and doors. We talked about the improved ventilation of the attic space? Noral D. Stewart: This was the ventilation of the kennel space which pulls air into the attic and through the ducts and then out. The final step was after doing all this we found the weak link was the attic ventilation. An attic space will typically have some ventilation vents at the ridges and at the soffets to pull air out through the attic and ventilate the attic and there was code requirement for a minimum amount of that. The original design had about twice the ventilation are that is required by code and I recommended it reduced down to just over the minimum required by code which gave us the final two or three decibels reducing the sound. Nick Herman: You had a total of four recommendations? Noral D. Stewart: Yes. Nick Herman: And your understanding is that all those recommendations have been accepted by Mr. Lonsway? Noral D. Stewart: Yes that is my understanding. Nick Herman: Do you have an opinion as to whether or not these acoustical improvements along with what is already in the plans, what that would mean for this facility in terms of sound control? Noral D. Stewart: My estimate is that if you had most of the dogs in the kennel barking at one time which will occasionally occur or all of them, the level outside at the boundary at the Southerland side will not exceed 40 decibels or dba. That is even without taking into consideration any benefit of the trees or the six foot fence that was considered. It is not even taking into consideration the benefit of the absorptive ceiling in the kennel that was assuming that if you had the typical loud level you would find in the kennel with a hard ceiling and estimating level out through the boundary. We get down to less than 40 at the boundary and if you go to the house, you will go into the mid 30s. If you take into consideration some of these other factors, you will be even less. Nick Herman: How do I get a handle of what 40 decibels is? Noral D. Stewart: I did some reference and calculations for something people are typically familiar is a car on a highway. Your typical, normal automobile going 45-55 miles per hour, if you are 100 feet from that car as it passes by, you will hear about 60 decibels. If you are 200 feet, you will hear about 50. If you are 400 feet you hear about 40. The dogs, at the worst case, would be less than the level of a car 400 feet away.