B. No person shall operate or cause to be operated any source of sound at any location within the incorporated city or allow the creation of any noise on property owned, leased, occupied or otherwise controlled by such person, which causes the noise level when measured from the inside the nearest residence or business (windows open as season norm, to exceed:

C. If the measured ambient level differs from that permissible within any of the first four noise limit categories above, the allowable noise exposure standard shall be adjusted in five dB increments in each category as appropriate to encompass or reflect said ambient noise level.

In the event the ambient noise level exceeds the fifth noise limit category, the maximum allowable noise level under this category shall be increased to reflect the maximum ambient noise level.

D. If the measurement location is on a boundary between two different zones, the noise level limit applicable to the lower noise zone, plus five dB, shall apply.

E. If possible, the ambient noise shall be measured at the same location along the property line utilized in Section 8.16.110(B), with the alleged offending noise source inoperative. If for any reason the alleged offending noise source cannot be shut down, the ambient noise must be estimated by performing a measurement in the same general area of the source but at a sufficient distance such that the noise from the source is at least ten dB below the ambient in order that only the ambient level be measured. if the difference between the ambient and the noise standard is five to ten dB, then the level of the ambient itself can be reasonably determined by subtracting a one decibel correction to account for the contribution of the source.