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Electronic Code of Federal Regulations

e-CFR data is current as of June 3, 2020

Title 40Chapter ISubchapter CPart 60Subpart NN → §60.404

Title 40: Protection of Environment
Subpart NN—Standards of Performance for Phosphate Rock Plants

§60.404   Test methods and procedures.

(a) In conducting the performance tests required in §60.8, the owner or operator shall use as reference methods and procedures the test methods in appendix A of this part or other methods and procedures as specified in this section, except as provided for in §60.8(b).

(b) The owner or operator shall determine compliance with the particulate matter standards in §60.402 as follows:

(1) The emission rate (E) of particulate matter shall be computed for each run using the following equation:

E = (cs Qsd)/(P K)


E = emission rate of particulate matter, kg/Mg (lb/ton) of phosphate rock feed.

cs = concentration of particulate matter, g/dscm (g/dscf).

Qsd = volumetric flow rate of effluent gas, dscm/hr (dscf/hr).

P = phosphate rock feed rate, Mg/hr (ton/hr).

K = conversion factor, 1000 g/kg (453.6 g/lb).

(2) Method 5 shall be used to determine the particulate matter concentration (cs) and volumetric flow rate (Qsd) of the effluent gas. The sampling time and sample volume for each run shall be at least 60 minutes and 0.85 dscm (30 dscf).

(3) The device of §60.403(d) shall be used to determine the phosphate rock feed rate (P) for each run.

(4) Method 9 and the procedures in §60.11 shall be used to determine opacity.

(c) To comply with §60.403(f), if applicable, the owner or operator shall use the monitoring devices in §60.403(c) (1) and (2) to determine the average pressure loss of the gas stream through the scrubber and the average scrubbing supply pressure during the particulate matter runs.

[54 FR 6676, Feb. 14, 1989; 54 FR 21344, May 17, 1989]

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