11 ATTACHMENT 04 - Laserfiche WebLink

3. Instrumentation The on-site Or d incasurenent data were acquired by the use of one or more of the sound analyzer listed below. the instrumentation pre vides a direct readout of the t. exceedance statistical lei els including the equiva'.ent-energy level (Leg). Input to the meters were provided o. microphones extended to a height of 5 12. above the ground. The ''A weighting itctworb and the "Fast` response setting of the meters were used in conformance .with the applicable standards. The Larson-Davis meters were factor modified to conform with the Roe I performance standards of ANSI SI.4. All instrumentation was acoustically cali orated before and after field tests to assure accuracy. Bruel 8_ Kjaer 2231 Precision Integrating Scund Level Meter Larson Davis LDI N 1 2 Precision Integratint Sound Level Meter I.arson Davis 2901 Real Time Analyzer 4. Ventilation Reguirentents Ventilation requirements -o be applied cchcn ccindovts are maintained closed for noise control are specified in the Uniform Building Code (Ft BC). 2001 edition, Section 12.03.3 as follows: "In lieu itei required exterior openings for natural ventilation_ a mechanical ventilating system may he provided. Such stem shall he capable of providing two air changes per hour in guest rooms. dormitories. habitable rooms. and in public corridors with a minimum of 15 cubic feet per minute 7117s) of outside air per occupant c wring such time as the building is occupied.- Based on our precious experience. a "summer switch" on the furnace fan is normally considered acceptable as a centilatiot system by El IA and other agencies. Air- conditioning is also an ac::eptahle sstem. 0-4