PERMFILE64030

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 1/22/2004
• Section_Exhibit Name: Exhibit 42A Lone Pine Gulch Ventilation Facilities
• Media Type: D
• Archive: No

• NOTES
~ Article 12 of the Colorado State Regulations.
2 This meter meets the following specifications: IEC 651 for Type 22 sound level meters, IEC GGt fur
Type II integrating meters, and IEC 225 for octave hand filters.
~ The C-weighting network is used to limit the frequency response of the meter to the human auuit~le
range of 20-ZOk Hz.
' A-weighting is designed to correspond to the frequency response of the human ear.
s This meter meets the fallowing specifications: IEC 651 specifications far Type II sound Ic•,~c{ melr~>:.
•