DESIGNATION NUMBER : RFCA-1280-050

IDENTIFICATION :     "MASS-CO, Model 1 Carbon Monoxide Analyzer",
operated on a range of 0 - 50 ppm, with automatic zero and span
adjustments at time intervals not to exceed 4 hours, with or without the
100 millivolt and 5 volt output options.  The method consists of the
following components:

       (1)  Infra-2 (Uras 2) Infrared Analyzer Model 5611-200-35
       (2)  Automatic Calibrator Model 5869-111
       (3)  Electric Gas Cooler Model 7865-222 or equivalent with
            pre-humidifier
       (4)  Diaphragm Pump Model 5861-214 or equivalent
       (5)  Membrane Filter Model 5862-111 or equivalent
       (6)  Flow Meter Model SK 1171-U or equivalent
       (7)  Recorder Model Mini Comp DN 1/192 or equivalent

NOTE :  This method is not now commercially available.

SOURCE :             Commonwealth of Massachusetts
                     Department of Environmental Quality Engineering
                     Tewksberry, MA 01876

 MANUAL
   OR      :         Automatic
AUTOMATIC

REFERENCE
   OR      :         Reference
EQUIVALENT

FEDERAL VOLUME       REGISTER PAGE        NOTICE DATE
--------------       -------------        -----------
     45                   81650             12/11/80