(a) The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a point source subject to the provisions of this subpart after application of the best available technology economically achievable: ------------------------------------------------------------------------
Effluent limitations
-----------------------------
Average of daily
Effluent characteristic Maximum values for 30
for any 1 consecutive days
day shall not
exceed--------------------------------------------------------------------------
Metric units (kg/kkg of raw
material)
-----------------------------TSS....................................... 0.096 0.064Oil and grease............................ 0.024 .016pH........................................ (\1\) (\1\)
-----------------------------
English units (lb/1,000 lb
of raw material)
-----------------------------TSS....................................... 0.096 0.064Oil and grease............................ 0.024 .016pH........................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range 6.0 to 9.0.
(b) All plants constructed before 1959 shall employ the best available maintenance and housekeeping practices in order to minimize the discharge of oil and grease in nonprocess waste waters. The concentration of oil and grease in discharges of nonprocess waste waters shall meet the following limitations:
(1) The average of daily values for 30 consecutive days shall not exceed 5 mg/l.
(2) The maximum for any one day shall not exceed 10 mg/l. [39 FR 6662, Feb. 21, 1974; 39 FR 26423, July 19, 1974, as amended at 40 FR 18173, Apr. 25, 1975] Sec. 428.14 [Reserved]