Except as provided in 40 CFR 403.7 and 403.13 any existing source subject to this subpart which introduces pollutants into a publicly
owned treatment works must comply with 40 CFR 403 and achieve the following pretreatment standards for existing sources (PSES). The following standards apply to the total refinery flow contribution to the POTW:
Pollutant or pollutant property
Pretreatment standards for existing sources—maximum for any 1 day
1 Where the discharge to the POTW consists solely of sour waters, the owner or operator
has the option of complying with this limit or the daily maximum mass limitation for
ammonia set forth in § 419.53 (a) and (b).
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