Section 60320.308 - Pathogenic Microorganism Control(a) A SWSAP WRA shall design and operate SWSAP treatment processes such that the recycled municipal wastewater delivered to an augmented reservoir for use by a SWSAP PWS receives treatment as follows: (1) For a SWSAP PWS implementing the requirements of section 64668.30(c)(1), the treatment train shall reliably achieve at least 8-log10 enteric virus reduction, 7-log10Giardia cyst reduction, and 8-log10Cryptosporidium oocyst reduction, consisting of at least two separate treatment processes for each pathogen (i.e., enteric virus, Giardia cyst, or Cryptosporidium oocyst). A separate treatment process may be credited with no more than 6-log10 reduction, with at least two processes each being credited with no less than 1.0-log10 reduction. A single treatment process may receive log10 reduction credits for one or more pathogens.(2) For a SWSAP PWS implementing the requirements of section 64668.30(c)(2), the treatment train shall reliably achieve at least 9-log10 enteric virus reduction, 8-log10Giardia cyst reduction, and 9-log10Cryptosporidium oocyst reduction, consisting of at least three separate treatment processes for each pathogen (i.e., enteric virus, Giardia cyst, or Cryptosporidium oocyst). A separate treatment process may be credited with no more than 6-log10 reduction, with at least three processes each being credited with no less than 1.0-log10 reduction. A single treatment process may receive log10 reduction credits for one or more pathogens.(3) The State Board may increase the minimum enteric virus, Giardia cyst, and Cryptosporidium oocyst log10 reductions required in paragraphs (1) and (2) as a result of a SWSAP PWS relying on additional treatment to obtain State Board approval of an alternative minimum theoretical retention time pursuant section 64668.30(b) of Chapter 17.(b) The SWSAP WRA shall validate each of the treatment processes used to meet the requirements in subsection (a) for their log reduction by submitting a report for the State Board's review and written approval, or by using a challenge test approved by the State Board, that provides evidence of the treatment process's ability to reliably and consistently achieve the log reduction. The report and/or challenge test shall be prepared by an engineer licensed in California with at least five years of experience, as a licensed engineer, in wastewater treatment and public water supply, including the evaluation of treatment processes for pathogen control. The SWSAP WRA shall propose and include in its Operations Plan, prepared pursuant to section 60320.322, on-going monitoring using the pathogenic microorganism of concern or a microbial, chemical, or physical surrogate parameter(s) that verifies the performance of each treatment process's ability to achieve its credited log reduction.(c) If the applicable pathogen reduction in subsection (a) is not met based on the on-going monitoring required pursuant to subsection (b), within 24 hours of its knowledge of an occurrence, the SWSAP WRA shall investigate the cause and initiate corrective actions. If there is a failure to meet the pathogen reduction criteria longer than 4 consecutive hours or more than a total of 8 hours during any 7-day period, the SWSAP WRA shall, within 24 hours of its knowledge of such a failure, notify the State Board, Regional Board, and each SWSAP PWS utilizing the augmented reservoir. Failures of shorter duration shall be reported to the Regional Board no later than 10 days after the month in which the failure occurred.(d) The SWSAP WRA shall, within 24 hours of its knowledge, notify the State Board, Regional Board, and each SWSAP PWS utilizing the augmented reservoir and, unless directed otherwise by the State Board and the Regional Board, discontinue delivery of recycled municipal wastewater to the SWSAP augmented reservoir if: (1) pursuant to the pathogen reduction requirements in subsection (a)(1), the effectiveness of the treatment train to reduce enteric virus is less than 6-logs10, Giardia cysts reduction is less than 5-logs10, or Cryptosporidium oocysts reduction is less than 6-logs10,(2) pursuant to the pathogen reduction requirements in subsection (a)(2), the effectiveness of the treatment train to reduce enteric virus is less than 7-logs10, Giardia cysts reduction is less than 6-logs10, or Cryptosporidium oocysts reduction is less than 7-logs10, or(3) effectiveness of the treatment train to reduce enteric virus, Giardia cysts, or Cryptosporidium oocysts is less than a log10 reduction value derived from deducting 2-logs10 from each of the minimum enteric virus, Giardia cyst, and Cryptosporidium oocyst log10 reductions required pursuant to subsection (a)(3).Cal. Code Regs. Tit. 22, § 60320.308
1. New section filed 8-7-2018; operative 10-1-2018 (Register 2018, No. 32). Note: Authority cited: Sections 13521 and 13562, Water Code; and Section 116271, Health and Safety Code. Reference: Sections 13520, 13521, 13522.5, 13523, 13523.1 and 13562, Water Code; and Section 116551, Health and Safety Code.
1. New section filed 8-7-2018; operative 10/1/2018 (Register 2018, No. 32).