327 Ind. Admin. Code 7.1-2-30

Current through December 4, 2024

Section 327 IAC 7.1-2-30 - "pH" defined

Authority: IC 13-14-8; IC 13-18-12-4

Affected: IC 13-18-12

Sec. 30.

"pH" means the logarithm of the reciprocal of hydrogen ion concentration measured at twenty-five (25) degrees Centigrade (seventy-seven (77) degrees Fahrenheit) or measured at another temperature and then converted to an equivalent value at twenty-five (25) degrees Centigrade (seventy-seven (77) degrees Fahrenheit).

327 IAC 7.1-2-30

Water Pollution Control Board; 327 IAC 7.1-2-30; filed Jul 8, 2002, 2:01 p.m.: 25 IR 3721; readopted filed Jun 4, 2008, 11:07 a.m.: 20080702-IR-327080207BFA

Readopted filed Jul 30, 2014, 4:04 p.m.: 20140827-IR-327140189BFA

Readopted filed 5/27/2020, 11:52 a.m.: 20200624-IR-327200186BFA

Filed 3/3/2022, 10:40 a.m.: 20220330-IR-327140029FRA