Ariz. Admin. Code § R18-9-C814 - Initial Source Water Characterization

A. An AWPRA applicant shall develop an Initial Source Water Characterization Plan and shall conduct initial monitoring of any treated wastewater proposed to be used as a source for an AWTF.

B. Initial Source Water Characterization Plan. An initial source water characterization monitoring plan, or Initial Source Water Characterization Plan, shall be developed and followed when conducting initial monitoring in accordance with this section.

1. A Non-National Pretreatment Program AWPRA applicant shall submit the Initial Source Water Characterization Plan to the Department for review and comment prior to conducting initial source water monitoring under this section. Along with the Initial Source Water Characterization Plan, the AWPRA applicant shall submit the following additional preliminary components to the Department for review and comment:

a. A draft Enhanced Source Control Plan prepared pursuant to R18-9-E824,

b. A draft technical, managerial, and financial, or Technical, Managerial, and Financial Capacity Plan, prepared pursuant to R18-9-F833,

c. A proposed pilot train designed pursuant to R18-9-C815, and

d. A draft Public Communications Plan prepared pursuant to R18-9-B811.

2. A National Pretreatment Program AWPRA applicant may submit the Initial Source Water Characterization Plan to the Department for review and comment prior to conducting initial source water monitoring under this section, or otherwise shall submit the Initial Source Water Characterization Plan and Report to the Department as a component of the AWP permit application prepared pursuant to R18-9-C816. An AWPRA applicant that elects to submit the Initial Source Water Characterization Plan to the Department for review and comment prior to conducting initial source water monitoring under this section may also elect whether or not to submit the additional preliminary components listed in subsection (B)(1) to the Department for contemporaneous review and comment.

C. Monitoring. An AWPRA applicant shall conduct initial source water monitoring at all water reclamation facilities delivering treated wastewater as a source to an AWTF as applicable under R18-9-A802(C).

1. Monitoring shall be conducted at a location before any treatment process that will be used for a treatment credit in the AWP project and before the point of diversion to the AWTF.

2. Chemical Monitoring.

a. The AWPRA applicant shall collect a minimum of twelve monthly composite samples representative of seasonal variability.

b. If there is wide variability in a chemical concentration, meaning the coefficient of variation is greater than fifty percent, the AWPRA applicant shall reasonably increase the sampling interval in order to evidence this variability.

c. The AWPRA applicant shall sample for the following chemicals, excluding those identified on the projected chemical treatment list developed in R18-9-E826:

i. Tier 1 chemicals,

ii. Tier 2 chemicals pursuant R18-9-E826(D), and

iii. Any projected Tier 3 chemicals.

3. Pathogen Monitoring.

a. The AWPRA applicant shall utilize reference pathogens to monitor pathogen treatment within the AWP project and establish log reduction requirements consistent with either a standard log reduction approach or a site-specific log reduction approach pursuant to R18-9-E828.

b. Standard Log Reduction. If the AWPRA applicant selects the standard log reduction approach to pathogen control, no initial pathogen monitoring is required as part of initial source water characterization.

c. Site-Specific Log Reduction. If the AWPRA applicant selects the site-specific log reduction approach to pathogen control, the AWPRA applicant shall perform initial pathogen monitoring as part of initial source water characterization by following the prescribed sampling protocol pursuant to R18-9-E828(C).

D. In addition to the requirements of this section, initial source water monitoring under an Initial Source Water Characterization Plan shall be conducted using good engineering practices. Methods for initial source water monitoring shall be approved if the AWPRA applicant can demonstrate that the methods are sufficiently detailed and robust for the purpose of characterizing the treated wastewater used as a source for an AWTF in such a manner that informs the proposed pilot and full-scale treatment train design and serves as an accurate representation of the collection system.

1. ADEQ shall develop and make available guidance on conducting initial source water monitoring under an Initial Source Water Characterization Plan.

2. An Initial Source Water Characterization Plan developed in a manner consistent with the criteria contained in an applicable ADEQ guidance document shall be considered to have been conducted using good engineering practices.

E. Report. An Initial Source Water Characterization Report shall be finalized within three years of the commencement of initial source water monitoring or at the Director's discretion. The Initial Source Water Characterization Report shall be prepared pursuant to R18-9-A802(C) and shall include, but is not limited to, the following:

1. The date, time, frequency and exact place of sampling,

2. The name of each individual who performed the sampling,

3. The procedures used to collect the samples,

4. The dates the sample analyses were completed,

5. The name of each individual or laboratory performing sample analysis,

6. The analytical techniques or methods used to perform the sampling and analysis,

7. The chain of custody records,

8. Any field notes relating to the information described under this subsection,

9. The sampling results which account for seasonal variability,

10. Corresponding laboratory data for all samples, and

11. A copy of the Initial Source Water Characterization Plan developed in subsection (B).

F. Report Submission.

1. A Non-National Pretreatment Program AWPRA applicant shall submit the Initial Source Water Characterization Report in subsection (E) to the Department for review and comment as a component of the Pilot Study Plan prepared pursuant to R18-9-C815. Additionally, a Non-National Pretreatment Program AWPRA applicant shall submit the Initial Source Water Characterization Report as a component of the AWP permit application prepared pursuant to R18-9-C816.

2. A National Pretreatment Program AWPRA applicant, if electing to submit a Pilot Study Plan to the Department for review and comment, may include the Initial Source Water Characterization Report in subsection (E) as a component, or otherwise shall submit the Initial Source Water Characterization Report as a component of the AWP permit application prepared pursuant to R18-9-C816.

G. The Department shall consider an AWPRA applicant's conformance with the initial source water characterization requirements in this Article as a component of the AWP permit application. The Director shall deny an AWP permit application if a determination is made that, under the Initial Source Water Characterization Plan, monitoring was improperly conducted or is otherwise insufficient to achieve the objectives of chemical and pathogen characterization, or if the Initial Source Water Characterization Report is incomplete or otherwise insufficient to demonstrate compliance with the Plan.

Notes

Ariz. Admin. Code § R18-9-C814

Former Section R9-8-331 renumbered without change as Section R18-9-814 (Supp. 87-3). Amended effective October 19, 1989 (Supp. 89-4). Section repealed by final rulemaking at 7 A.A.R. 235, effective December 8, 2000 (Supp. 00-4). New Section made by final rulemaking at 31 A.A.R. 1069, effective 3/4/2025.