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TABLE Ia: For plants where daily tests of heating value are made by the corporation and checked at intervals by the Commission. This table covers the period from January 1st to December 31st, except as noted, during which it was required that the average monthly heating value should be not less than 585 B. t. u. per cubic foot, and that such average should not be more than 5 per cent below 585 on any three consecutive days.
Range of monthly
a Tests for period April 1st to October 31, 1923.
TABLE Ib: This table covers the period from January 1st to December 31st, except as noted, and includes only those corporations for which a standard of an average heating value of 537 B. t. u. per cubic foot was established by order of the Commission.
TABLE II: For plants of small size which are not required to make daily tests of heating value, but where tests are made by the Commission from time to time. An average heating value of .not less than 585 British thermal units per cubic foot is required.
The plant at Beacon was by order of the Commission permitted to furnish gas at a standard not less than 537 British thermal units per cubic foot, effective October 15, 1922. This plant was excused temporarily from making daily tests. Tests made periodically by the Commission show the following results:
TABLE III: Showing the number of tests made in each locality with respect to each of the factors shown, the number of deficiencies found, and a summary of the pressures obtaining at time of tests. The established standards prescribe a maximum of 30 grains of sulphur compounds and 5 grains of ammonia in each 100 cubic feet of gas, and prohibits the presence of more than a trace of hydrogen sulphide.