US lawIndianaRegulationsTitle 327 — Water Pollution Control DivisionArticle 6.1 — ARTICLE 6.1. LAND APPLICATION OF BIOSOLID, INDUSTRIAL WASTE PRODUCT, AND POLLUTANT-BEARING WATERRule 2 — Definitions6.1-2-50327 IAC 6.1-2-50327 IAC 6.1-2-50 "Specific oxygen uptake rate" or "SOUR" definedLast amended: 2026Year: 2027Length: 30 wordsOfficial source Cite as Ind. Admin. Code tit. 327, r. 6.1-2-50Sec. 50. "Specific oxygen uptake rate" or "SOUR" means the mass of oxygen consumed per unit time per unit mass of percent total solids, dry weight basis, in the biosolid.Previous327 IAC 6.1-2-49Next327 IAC 6.1-2-51