Section 435.34 - Pretreatment standards for new sources (PSNS)(a)PSNS for wastewater from unconventional oil and gas extraction. Except as provided in 40 CFR 403.7 and 403.13 , any new source with discharges subject to this section must achieve the following pretreatment standards for new sources (PSNS). (1) There shall be no discharge of wastewater pollutants associated with production, field exploration, drilling, well completion, or well treatment for unconventional oil and gas extraction (including, but not limited to, drilling muds, drill cuttings, produced sand, produced water) into publicly owned treatment works.(2) For the purposes of this section, the definitions of unconventional oil and gas, drill cuttings, drilling muds, produced sand, and produced water are as specified in § 435.33(b)(2)(i) through (v) .(b)PSNS for Wastewater from Conventional Oil and Gas Extraction. [Reserved] 81 FR 41857 , June 28, 2016