WPC 2BJ ZCourierCourierCourier Bold>x6X@`7X@HP LaserJet 4 PlusHPLA4PLU.PRSx6X@7\m!>X@3|uBold2 ZA]0HP LaserJet 4PHPLAS4P.PRS4x6X@7\I!vX@3|u ??  33 #u6X@J@#Ыx6X@7X@<6X9`(*Courier 12pt (10cpi)Xu6X@J@<6X9`(*Courier 12pt10cpiJu6X@J@<6X9`(*Courier 12pt10cpiJ2X=A_ <?xxx,>x6X@`7X@<=uuu,u6X@`7I@=uuu,ӧu `7I   333  ??/ J   /?? #u6X@J@# ??/ y"3dddy  = Prepared by Dan Bivins , EMC//#(-772 EMTIC GD039  =  Emissions, Monitoring, and Analysis Division, OAQPS, EPA??B G""LFebruary 18, 1997  : y"mdddyy"mdddyy#$dddy  =  EMISSION MEASUREMENT TECHNICAL INFORMATION CENTER  =8  GUIDELINE DOCUMENT  $ ) y#$$dddy ) 1ALTERNATIVE FOR ANALYZING CALIBRATION GAS CYLINDERS )  /Y/ *  => *Y INTRODUCTION A manufacturers or vendors calibration gas cylinder that is used for calibrations of continuous emission monitoring systems (CEMS) may be suspected of being outside the guaranteed limits of the tag value. There are two options to correcting this situation that may be chosen. The first is to ask the vendor to replace the cylinder with one with a correct value. The second is to analyze the cylinder with an EPA instrumental method or a CEMS calibrated with a protocol gas to determine an alternative or appropriate concentration value for the cylinder. This second option is the topic of this alternative. The EMTIC recommends that this alternative is applicable for determining the values of gases greater than 100 ppm tag value used for daily calibrations of CEMS where protocol gases are not required by rule, permit, performance specification, or quality assurance procedures.  =  Alternative X YY1. The gas analyzer is the same as specified for the applicable reference method (e.g., 3A, 6C, 7E, etc.) used for the performance specification testing of the CEMS or the applicable CEMS that has been calibrated as defined in the applicable requirements using a protocol gas.Ʃ$ YY2. The gas analyzer or CEMS and associated sample transport or manifold  system must have passed all applicable measurement system performance  test procedures as defined by the applicable reference method or )#)#L)#)#L performance specification. 3. The criteria and procedure for acceptance of the alternative value are  as follows: Analyze the gas three times. Each of the individual results  shall be within 5 percent of the triplicate set average; otherwise,  discard the entire set, and repeat the triplicate analyses. If the  average of the triplicate analyses is within 5 percent of the  calibration gas manufacturers cylinder tag value, use the tag value;  otherwise, conduct at least three additional analyses until the results  of six consecutive runs agree within 5 percent of their average. Then  use this average for the alternative cylinder value if the sixrun P#P#MP#P#MP#P#M average is within 15 percent of the manufactures cylinder tag value. $$PIf the meassured value of a gas cylinder is 15 percent different from A#A#Mthe manufacturers tag value, the cylinder should not be used for daily  calibrations.