NCUAQMD RULE 3-5-500 RULE TESTING METHOD
LAST REVISED 11/11/11

RULE 5-500 - TESTING METHOD:

Source testing shall be conducted in accordance with ARB Test Methods and the method evaluations cited therein or an acceptable source test method approved by the Executive Officer of the Air Resources Board. Specific testing requirements to apply the regulatory limits of this rule are as follows:

(a) To determine the "control efficiency" requirements of this regulation, ethylene oxide (EtO) mass or

concentration reduction efficiency of a control device, shall be measured with ARB Test Method 431

(Title 17, CCR, Section 94143) according to the source testing requirements herein, and expressed as

a percentage calculated across the control device as follows:

~ EtO in - ~ EtO out x 100 = % Control Efficiency

~ EtO in

The procedures that will be utilized during the source testing are as follows:

(1) The test on a control device for a sterilizer exhaust stream shall be run with a typical load, as

approved by the District, in the sterilizer.

(2) The test on a control device for an aerator exhaust stream shall be run with a typical load, as

approved by the District, in the aerator.

(3) The inlet and outlet of the control device shall be sampled simultaneously during testing to measure the control efficiency.

(4) The efficiency of each control device shall be determined under conditions of maximum ethylene

oxide mass flow to the device, under normal operating conditions. To measure the control

efficiency of the control device on the sterilizer exhaust stream, sampling shall be done during

the entire duration of the first sterilizer evacuation after ethylene oxide has been introduced. To

measure the control efficiency of the control device on an aerator exhaust stream with a constant

air flow, sampling shall be done during a period of at least 60 minutes, starting 15 minutes after

aeration begins. To measure the control efficiency of the control device on an aerator exhaust

stream with a non-constant air flow, sampling shall be done during the entire duration of the first

aerator evacuation after aeration begins.

(5) There shall be no dilution of the air stream between the inlet and outlet test points during testing.

(b) To determine the "leak free" requirements of this regulation the ARB Test Method 21 (Title 17,

CCR, Section 94124) using a portable flame ionization detector or a non-dispersive infrared analyzer,

calibrated with methane, or an acceptable alternative method or analytical instrument approved by the

District shall be used. A chlorofluorocarbon-12 specific audible detector using a metal oxide semi- conductor sensor shall be considered an acceptable alternative for exhaust systems carrying a sterilant

gas mixture of ethylene oxide and chlorofluorocarbon-12.