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HomeMy WebLinkAboutPackets - Stormwater Utillity Commission (200)       AGENDA STORMWATER UTILITY COMMISSION REGULAR SESSION MARCH 20, 2025 HOPI CONFERENCE ROOM 11000 N. LA CAÑADA DRIVE        REGULAR SESSION AT OR AFTER 4:00 PM   CALL TO ORDER   ROLL CALL   CALL TO AUDIENCE - at this time, any member of the public is allowed to address the Commission on any issue not listed on today’s agenda. Pursuant to the Arizona open meeting law, individual Commission members may ask Town staff to review the matter, ask that the matter be placed on a future agenda, or respond to criticism made by speakers. However, the Commission may not discuss or take legal action on matters raised during "Call to Audience." In order to speak during "Call to Audience", please specify what you wish to discuss when completing the blue speaker card.   COUNCIL LIAISON COMMENTS (INFORMATIONAL ONLY)   DIRECTORS REPORT (INFORMATIONAL ONLY)   REGULAR SESSION AGENDA   1.REVIEW AND APPROVAL OF THE JANUARY 16, 2025 MEETING MINUTES   2.DISCUSSION OF MEETINGS AND EVENTS   3.DISCUSSION OF THE ADEQ SMALL MS4 PERMIT CHARACTERIZATION MONITORING PROGRAM   4.DISCUSSION OF APRIL 18, 2025 STORMWATER UTILITY COMMISSION FIELD TRIP   ADJOURNMENT   POSTED: 3/14/25 at 5:00 PM by dt When possible, a packet of agenda materials as listed above is available for public inspection at least 24 hours prior to the Commission meeting in the Town Clerk's Office between the hours of 8:00 a.m. – 5:00 p.m. The Town of Oro Valley complies with the Americans with Disabilities Act (ADA). If any person with a disability needs any type of accommodation, please notify the Town Clerk’s Office at least five days prior to the Commission meeting at 229-4700. INSTRUCTIONS TO SPEAKERS Members of the public have the right to speak during any posted public hearing. However, those items not listed as a public hearing are for consideration and action by the Commission during the course of their business meeting. Members of the public may be allowed to speak on these topics at the discretion of the Chair. If you wish to address the Commission on any item(s) on this agenda, please complete a blue speaker card located on the Agenda table at the back of the room and give it to the Recording Secretary. Please indicate on the speaker card which item number and topic you wish to speak on, or if you wish to speak during “Call to Audience,” please specify what you wish to discuss when completing the blue speaker card. Please step forward to the podium when the Chair announces the item(s) on the agenda which you are interested in addressing. 1. For the record, please state your name and whether or not you are a Town resident. 2. Speak only on the issue currently being discussed by the Commission. Please organize your speech, you will only be allowed to address the Commission once regarding the topic being discussed. 3. Please limit your comments to 3 minutes. 4. During “Call to Audience”, you may address the Commission on any issue you wish. 5. Any member of the public speaking must speak in a courteous and respectful manner to those present. Thank you for your cooperation. “Notice of Possible Quorum of the Oro Valley Town Council, Boards, Commissions and Committees: In accordance with Chapter 3, Title 38, Arizona Revised Statutes and Section 2-4-4 of the Oro Valley Town Code, a majority of the Town Council, Board of Adjustment, Historic Preservation Commission, Parks and Recreation Advisory Board, Stormwater Utility Commission, and Water Utility Commission may attend the above referenced meeting as a member of the audience only.”    Stormwater Utility Commission 1. Meeting Date:03/20/2025   Requested by: Dennis Roberts, Public Works Submitted By:Yarina Hynd, Public Works SUBJECT: REVIEW AND APPROVAL OF THE JANUARY 16, 2025 MEETING MINUTES RECOMMENDATION: Staff recommends approval. EXECUTIVE SUMMARY: N/A BACKGROUND OR DETAILED INFORMATION: N/A FISCAL IMPACT: N/A SUGGESTED MOTION: I MOVE to approve (approve with changes), the January 16, 2025 meeting minutes. Attachments 01-16-25 Draft Minutes  D R A F T MINUTES STORMWATER UTILITY COMMISSION REGULAR SESSION JANUARY 16, 2025 HOPI CONFERENCE ROOM 11000 N. LA CAÑADA DRIVE            REGULAR SESSION AT OR AFTER 4:00 PM   CALL TO ORDER Chair Crocker called the meeting to order at 4:00 P.M.   ROLL CALL Present: Richard Hawkinson, Commissioner Rob Schlicher, Commissioner Richard Crocker, Chair Staff Present:Dennis Roberts, Interim Division Manager Attendees: Dr. Harry Greene, Town Council Liaison  Commissioner Schlicher attended via telephone.   CALL TO AUDIENCE There were no speaker requests at this time.   COUNCIL LIAISON COMMENTS (INFORMATIONAL ONLY) Council Liaison Dr. Harry Greene commented that he appreciated everything that previous Stormwater Division Manager John Spiker did, and that he did a terrific job. He wished Mr. Spiker well in his new job. Councilmember Greene also stated that the Council will be going into study sessions in the next month or so to prepare the course for the Town.   DIRECTORS REPORT (INFORMATIONAL ONLY) Interim Stormwater Division Manager Dennis Roberts commented on the following: The presentation to the Stormwater Utility Commission (SWUC) about the Notice of Intent for the Stormwater Rate Review has been rescheduled for the SWUC meeting on February 20, 2025. Stormwater Utility (SWU) staff will meet with the Mayor and Council in early February to introduce the presentation. The Flood Control District advisory committee has announced a significant update regarding their revised methodology for peak discharge calculation software. A reminder that there are openings for the SWUC. Interested residents can visit orovalleyaz.gov and search 'Boards and Commissions' to learn more. The SWU team is partnering with the Pima County Flood Control District (PCFCD) for an exciting project collaboration at the end of the month. This meeting will explore potential projects and foster greater teamwork between our two organizations. 1/16/25 Minutes, Stormwater Utility Commission Regular Session 1 The Arizona Department of Emergency and Military Affairs (ADEMA) has reviewed and ranked Notices of Intent submitted by various Arizona agencies for the Hazard Mitigation Grant Program Post-Fire 5493 Grant. Our proposal for drainage infrastructure improvements on North Pomegranate Drive has been ranked, and we are now competing for this grant. The SWU received a request for information from FEMA regarding the Highland Wash Flood Control Project. We responded and submitted our deliverables on January 14, 2025. We are hopeful that we will get a notification of award in our next correspondence with FEMA.   REGULAR SESSION AGENDA   1.REVIEW AND APPROVAL OF THE NOVEMBER 21, 2024 MEETING MINUTES       Motion by Chair Richard Crocker, seconded by Commissioner Richard Hawkinson to approve the November 21, 2024 meeting minutes.  Vote: 3 - 0 Carried   2.NOMINATION AND ELECTION OF STORMWATER UTILITY COMMISSION CHAIR EFFECTIVE JANUARY 17, 2025       Motion by Chair Richard Crocker, seconded by Commissioner Rob Schlicher to elect Chair Richard Crocker as Stormwater Utility Commission Chair.  Vote: 3 - 0 Carried   3.NOMINATION AND ELECTION OF STORMWATER UTILITY COMMISSION VICE CHAIR EFFECTIVE JANUARY 17, 2025       Motion by Commissioner Richard Hawkinson, seconded by Commissioner Rob Schlicher to elect Commissioner Richard Hawkinson as Stormwater Utility Commission Vice Chair. Discussion had ensued among the Commissioners. Both Commissioner Schlicher and Commissioner Hawkinson expressed their willingness to nominate themselves. Upon hearing that Commissioner Hawkinson nominated himself, Commissioner Schlicher seconded, stating that he would vote for Commissioner Hawkinson. All votes were cast unanimously for Commissioner Hawkinson.  Vote: 3 - 0 Carried   4.DISCUSSION REGARDING THE STORMWATER UTILITY COMMISSION REGULAR SESSION MEETING SCHEDULE FOR CALENDAR YEAR 2025       The Stormwater Utility Commissioners reviewed the 2025 SWUC meeting dates as presented. Meetings will be held on the 3rd Thursday of each month. The attached document list the anticipated meeting dates for regular meetings of the SWUC for 2025. Mr. Roberts shared that Town Code Section 15-24-6 establishes a Town of Oro Valley Stormwater Utility Commission comprised of five (5) Oro Valley residents, and the Mayor and Council shall appoint the members. Commissioners serve two-year terms, with the possibility of reappointment for another term. Topics discussed during Regular Session Meetings are mostly informational, related to ongoing SW projects and administrative reports. One exception to this is the requirement in Town Code 15-24-13 Section H. It mandates that the Stormwater Utility Commission (SWUC) annually review the Stormwater Utility revenue requirements and recommend rate adjustments to the Town Council as necessary. Chair Crocker commented that the 2024 SWUC Tour of Projects Field Trip was canceled in 1/16/25 Minutes, Stormwater Utility Commission Regular Session 2 Chair Crocker commented that the 2024 SWUC Tour of Projects Field Trip was canceled in October 2024, and no date for a 2025 SWUC Field Trip was listed in the 2025 meeting schedule. He suggested that the Commission seek a recommendation from staff regarding a suitable date and have staff present the information at the next SWUC meeting.   5.DISCUSSION OF MEETINGS AND EVENTS       Mr. Roberts discussed recent meetings and events.   6.DISCUSSION OF 2024/2025 TOWN OF ORO VALLEY MS4 COMPLIANCE SCHEDULE, SECOND QUARTER REPORT       Mr. Roberts reported on the Town's 2024/2025 MS4 Compliance Schedule, Quarter 2, October 1 - December 31 2024 time period. The summary table shows that the SWU is up to date and has met their objectives this quarter. Chair Crocker stated that he understood that items not checked would take place during the remaining period. Mr. Roberts concurred.   7.DISCUSSION OF RESULTS OF NOVEMBER 14, 2024 TOWN OF ORO VALLEY MS4 AUDIT BY ADEQ       Mr. Roberts reported that on November 14, 2024, the ADEQ (Arizona Department of Environmental Quality) performed a compliance audit of the MS4 program of the Town of Oro Valley (Town). The objective was to evaluate the Town's Stormwater Management program and to identify any possible concerns. Discussion ensued. Chair Crocker inquired if the audit was rated as noncompliant and mentioned noticing minor noncompliance issues in the report. Mr. Roberts stated that noncompliance issues outlined in the report were corrected immediately or were in the process of being addressed. We are submitting a report to the ADEQ with pictures of the corrected issues. Mr. Roberts stated that the SWU did receive a nice compliment at the end of the audit where the inspectors mentioned that the Town was probably within the top echelon of towns that do a good job with their ADEQ inspection. Commissioner Hawkinson had questions about the current procedure the SWU has for taking samples, and also about the sampling in relation to the Environmental Protection Agency (EPA) rules. Commissioner Hawkinson wondered if the sampling rules differed between the ephemeral streams in our region and the permanent streams found in the eastern United States. Mr. Roberts commented that in the SWU sampling process, our staff go out when there is a big rain, and that we adhere to the requirements to take proper sampling. We continue to submit our sample results, and we get positive feedback from the agencies. Commissioner Hawkinson was interested in knowing what the state thinks about the sampling program and about what the EPA requires from dry environments as compared to hydrology in the east, and if that was something that could be modified to better fit the situation. Commissioner Schlicher commented that those requirements are stated in the General Permit and would probably require a change to the Permit. Mr. Roberts agreed, stating that a modification would indeed be required if needed. At a future SWUC meeting, Mr. Roberts will have staff present a report to bring the commission up to date about the procedure the SWU uses to take samples. Mr. Roberts will also reach out to our EPA contacts for feedback on our process. 1/16/25 Minutes, Stormwater Utility Commission Regular Session 3 Council Liaison Greene questioned the unnamed substance in uncovered containers pictured in the report. Mr. Roberts stated that the substance was identified as belonging to the Traffic Department and was related to striping. The ADEQ inspectors expressed concern about the storage of the material. They recommended that it should be contained during rain and covered properly. Chair Crocker, along with Council Liaison Greene, inquired whether it was necessary to recommend adequate storage. Mr. Roberts explained that the need for storage requirements was not communicated to him during the inspection. He assured the Commission that he would follow up on the storage issue.   ADJOURNMENT    Motion by Commissioner Rob Schlicher, seconded by Commissioner Richard Hawkinson to adjourn the meeting.  Vote: 3 - 0 Carried    Chair Crocker adjourned the meeting at 4:25 P.M.     I hereby certify that the foregoing minutes are a true and correct copy of the minutes of the regular session of the Town of Oro Valley Stormwater Utility Commission of Oro Valley, Arizona held on the 16th day of January 2025. I further certify that the meeting was duly called and held and that a quorum was present. ___________________________ Yarina Hynd Senior Office Specialist 1/16/25 Minutes, Stormwater Utility Commission Regular Session 4    Stormwater Utility Commission 2. Meeting Date:03/20/2025   Requested by: Dennis Roberts, Public Works Submitted By:Dennis Roberts, Public Works SUBJECT: DISCUSSION OF MEETINGS AND EVENTS RECOMMENDATION: N/A EXECUTIVE SUMMARY: The following is a list of immediate past, and future, stormwater meetings and events.  January 16, 2025 - Oro Valley Stormwater Utility Commission Meeting February 6, 2025 - Environmental Planning Advisory Committee Meeting February 20, 2025 - Oro Valley Stormwater Utility Commission Meeting (Canceled) March 4, 2025 - Ribbon-Cutting Ceremony for the New Oro Valley Community Center Entryway and Elevator March 19, 2025 - Pima County Regional Flood Control Advisory Committee Meeting March 20, 2025 - Oro Valley Stormwater Utility Commission Meeting April 18, 2025 - Oro Valley Stormwater Utility Commission Annual Field Trip April 25, 2025 - Annual MS4 Municipal Operations Training on Illicit Discharge Detection and Good Housekeeping   BACKGROUND OR DETAILED INFORMATION: For informational purposes only. FISCAL IMPACT: N/A SUGGESTED MOTION: N/A    Stormwater Utility Commission 3. Meeting Date:03/20/2025   Requested by: Dennis Roberts, Public Works Submitted By:Scott Bennett, Public Works SUBJECT: DISCUSSION OF THE ADEQ SMALL MS4 PERMIT CHARACTERIZATION MONITORING PROGRAM   RECOMMENDATION: N/A EXECUTIVE SUMMARY: The Arizona Department of Environmental Quality (ADEQ) introduced the latest Small MS4 Permit AZG2021-002, effective as of September 30, 2021. This updated permit redefines how agencies across Arizona manage stormwater, launching an innovative program to enhance our understanding of stormwater discharge impacts. One key requirement under this permit is for permittees to monitor stormwater discharges from their MS4 systems at three strategically chosen outfalls. The data collected through this monitoring effort will provide critical information on the characterization of stormwater discharges to protected surface waters. For a comprehensive overview of the program, please refer to the document titled Attachment-1-TOV-Sampling-Analysis-Plan, which contains a detailed sampling and analysis plan. By embracing this initiative, Oro Valley is protecting water quality and fostering sustainable practices for generations to come. BACKGROUND OR DETAILED INFORMATION: In alignment with the 2021 Arizona Department of Environmental Quality (ADEQ) Small MS4 Permit (AZG2021-002), the Town of Oro Valley Stormwater Utility has successfully completed its stormwater characterization monitoring requirements. The permit mandates that permittees sample stormwater discharges from their MS4 systems at three locations within two years of the permit’s effective date. To meet this requirement, the Town identified three representative outfalls to monitor stormwater pollution from the MS4 system:  Pusch View Lane Outfall: Sampled on December 12, 2022 Steampump Wash: Sampled on February 22, 2023 The Villages of La Cañada at the Cañada del Oro Wash: Sampled on September 12, 2023 Each location reflects a distinct land use—residential, commercial, and industrial—offering a comprehensive analysis of stormwater impacts across various environments. The collected data, documented in a Discharge Monitoring Report (DMR), provides critical insights into the pollutants identified at these sites. For an outline of monitored pollutants, please see Attachment-2-Monitoring-Constituents. For visual reference, a detailed map of the sampling locations is available in Attachment-3-Sampling-Locations. With the final sample collected on September 12, 2023, the Town of Oro Valley has demonstrated its commitment to water quality and environmental stewardship. This achievement underscores the importance of proactive monitoring in protecting Arizona’s surface waters for future generations. monitoring in protecting Arizona’s surface waters for future generations. Looking ahead, the next anticipated Small MS4 Permit is expected in 2026, and it is likely that the requirements will evolve to address emerging challenges in stormwater management. FISCAL IMPACT: N/A SUGGESTED MOTION: N/A Attachments Attachment-1-TOV-Sampling-Analysis-Plan  Attachment-2-Monitoring-Constituents  Attachment-3-Sampling-Locations  Section 1. Introduction 1.1 Background The Town of Oro Valley operates its storm drainage system under the authorization of the Arizona Pollution Discharge Elimination System (AZPDES) General Permit for Storm Water Discharges Associated with Small Municipal Separate Storm Sewer Systems (MS4s), hereafter referred to as the MS4 General Permit. The current MS4 General Permit, issued by the Arizona Department of Environmental Quality (ADEQ) is effective from September 30, 2021 through September 29, 2026. In accordance with Section 7.2 of the MS4 General Permit, The Town is required to sample stormwater discharges from the MS4 to protected surface waters at the outfalls identified by the Town in Part 7.2(4) of the permit. The Town is required to sample stormwater discharges from the MS4, as required in Appendix B, one (1) time within the first two (2) years of the effective date of the permit. This monitoring requirement is intended to provide discharge characterization data of stormwater discharges from the MS4 to State of Arizona listed protected surface waters. 1.2 Purpose This plan was created to better understand/Estimate pollutant loading into state listed protected surface waters from Town of Oro Valley outfalls. This sampling and analysis plan will describe the Town’s wet weather stormwater characterization monitoring program for the 2021 through 2026 permit term. Section 2. Town of Oro Valley Receiving Water Bodies 2.1 Receiving Water Body Overview Two State of Arizona protected surface waters exist within the Town of Oro Valley, (none of which are impaired or outstanding surface waters). These surface waters are The Canada Del Oro Wash (State Highway 77 to Town Limits) and Big Wash (Town Limits to Canada Del Oro Wash). Town of Oro Valley municipal outfall sampling locations and associated receiving waterbodies are identified in Table 2-1. Figure 2-1. provides a map of the Town’s outfalls and associated receiving waterbodies. Table 2-1 Town of Oro Valley Municipal Outfall Sampling Locations. Monitored Outfall Number Receiving Water Status (Outstanding/Impaired) Outfall Name & Location MO-1 Canada Del Oro Wash No Oro Valley Marketplace at CDO (32.413681 -110.938654) MO-2 Canada Del Oro Wash No Villages Of La Canada at CDO (32.388240 -110.992683) MO-3 Canada Del Oro Wash No Steampump Ranch at Foothills Wash (32.404034 -110.953742) Of the 23 identified outfalls within the Town of Oro Valley all sampling sites (3 municipal outfalls) are located along the Canada Del Oro Wash. Of the remaining 20 outfalls, 11 are located on private property with 9 along Big Wash near the Oro Valley Marketplace and 2 along the CDO. 9 other outfalls exist along the CDO, with 6 being municipal and 3 that fall under Pima County jurisdiction. According to the 2021 MS4 General Permit “the identified outfalls for this one-time characterization monitoring must be reported in a discharge monitoring report (DMR), including the identification of the land use for the area served by the outfall from the following three uses: residential, commercial, industrial. The permittee’s selected outfalls must be representative MS4 dischargers and discharge to a protected surface water”. The Town of Oro Valley has no industrial sites discharging into or near a State listed protected surface water. The monitoring locations will be representative of the general land uses within the Town and will be a mixture of 1 residential and 2 commercial outfalls along the Canada Del Oro watercourse. For a map of the 3 outfalls being monitored through this plan, see figure 2-1 below. Section 3. Stormwater Characterization Monitoring Constituents and Personnel 3.1 Analytical Constituents Stormwater runoff from urbanized areas may contain high concentrations of toxic metals, hydrocarbons, pesticides, bacteria, nutrients, and sediments. It is essential that sample analyses meet specific criteria. These analytic objectives for the Town of Oro Valley samples are shown in Appendix A of this document, which outlines the sampling parameters, units of measure for each parameter, the monitoring frequency, and the monitoring type to be used for this plan. 3.2 The Sampling Team The Sampling Team refers to all Stormwater Utility personnel who may be involved in the characterization monitoring program. See Table 3-1 for a list of Town of Oro Valley personnel involved in this sampling and analysis plan. Table 3-1 Responsible Personnel Name Title Contact Dennis Roberts Interim Stormwater Utility Division Manager 520-229-5044 Scott Bennett Stormwater Utility Analyst 520-229-4879 Jane Hutchins Stormwater Utility Inspector 520-229-4883 John Lynch Stormwater Utility Project Manager 520-229-4881 Currently Vacant Stormwater Utility Senior Engineer 520-229-4818 3.3 Sampling Method For storm water discharges associated with this sampling and analysis plan, the Town of Oro Valley will to the maximum extent practicable, sample during the first 30 minutes of a discharge associated with each rain event. Manual grab samples have been chosen as the sampling method for this program. This technique has been found to be most suitable for every constituent on the list of pollutants to be monitored in the AZG2021-002 MS4 General Permit. Manual grab samples will be taken at each site per the sampling protocols described in the NPDES Storm Water Sampling Guidance Document (U.S. Environmental Protection Agency, July 1992). According to this document, “a grab sample is a discrete, individual sample taken within a short period of time (usually less than 15 minutes). Analysis of grab samples characterizes the quality of a storm water discharge at the given time of the discharge.” Samples will be collected in clean, labeled bottles provided by the contracted laboratory. If necessary, an extension pole, rope or other apparatus will be used to aid the sampling crew in safe sample collection. Section 4. Analysis 4.1 Analytical Methods and Related Method Detection Limits The citations for the analytical methods and related detection limits for the Town of Oro Valley stormwater characterization monitoring program are as follows: Total Cyanide - SM 4500 CN E Sb, Cd, Ag & Tl - EPA 200.8 Ba, Be & Ni - EPA 200.7 Hg – EPA 245.1 608.3 Modified/Expanded - EPA 608 625.1 Modified/Expanded - EPA 625 624.1 List with 2-CEVE/AC/AC - Varies Appendix A: Stormwater Characterization Monitoring Constituents Parameter Units Monitoring Frequency Monitoring Type Metals I Antimony µg /L 1x during first 24 months of permit term Discrete Barium µg/L 1 x during first 24 months of permit term Discrete Beryllium µg/L 1x during first 24 months of permit term Discrete Cadmium µg/L 1x during first 24 months of permit term Discrete Nickel µg/L 1x during first 24 months of permit term Discrete Mercury µg/L 1 x during first 24 months of permit term Discrete Silver µg/L 1 x during first 24 months of permit term Discrete Thallium µg/L 1x during first 24 months of permit term Discrete lnorganics Cyanide µg/L 1 x during first 24 months of permit term Discrete Volatile Organic Compounds (VOCs) Acrolein µg/L 1x during first 24 months of permit term Discrete Acrylonitrile µg/L 1x during first 24 months of permit term Discrete Benzene µg/L 1 x during first 24 months of permit term Discrete Carbon tetrachloride µg/L 1x during first 24 months of permit term Discrete Chlorobenzene µg/L 1x during first 24 months of permit term Discrete Parameter Dibromochloromethane Chloroethane 2-chloroethylvinyl ether Chloroform Bromodichloromethane 1,2-dichlorobenzene 1,3-dichlorobenzene 1,4-dichlorobenzene 1, 1-dichloroethane 1,2-dichloroethane 1,3-dichloropropylene Ethyl benzene Bromomethane Chloromethane Methylene chloride 1,1,2,2- tetrachloroethane T etrachloroethylene Toluene 1,2-trans- dichloroethylene 1, 1, 1-trichloroethane Units Monitoring Frequency µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L' 1x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term Monitoring Type Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Parameter 1, 1,2-trichloroethane Trichloroethylene Vinyl chloride Xylene '• 2-chlorophenol 2,4-dichlorophenol 2,4-dimethylphenol 4, 6-di n itro-o-cresol 2,4-dinitrophenol 2-nitrophenol 4-nitrophenol p-chloro-m-cresol Pentachlorophenol Phenol 2, 4 ,6-trichlo rophenol Acenaphthene Acenaphthylene Anthracene Benz(a)anthracene Units Monitoring Frequency µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1 x during first 24 months of permit term Semi-VOCs -Acid Extractable µg/L 1 x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1x during first 24 months of permit term Semi-VOCs -Base/Neutrals µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1x during first 24 months of permit term Monitoring Type Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Parameter Benzo(a)pyrene Benzo(b )fluoranthene Benzo(g, h, i) perylene Benzo(k)fluoranthene Chrysene Dibenzo( a, h )anthracene 3,3'-dichlorobenzidine Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate 2,4-dinitrotoluene 2, 6-di n itrotoluene Di-n-octyl phthalate 1,2-diphenylhydrazine (as azobenzene) Fluoranthene Fluorene Hexachlorobenzene Hexachlorobutad iene Hexachlorocyclopentadi ene Hexachloroethane I Units Monitoring Frequency µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1x during first 24 months of permit term Monitoring Type Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Parameter lndeno(1,2,3-cd)pyrene lsophorone Naphthalene Nitrobenzene N-nitrosodimethylamine N-nitrosodi-n- propylamine N-nitrosod iphenylam ine Phenanthrene Pyrene 1,2,4-trichlorobenzene Aldrin Alpha-BHC Beta-BHC Gamma-BHC Delta-BHC Chlordane 4,4'-DDT 4,4'-DDE 4,4'-DDD Units Monitoring Frequency µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term PCB / Pesticides µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1 x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term µg/L 1x during first 24 months of permit term Monitoring Type Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete ,, I', Parameter Units Dieldrin µg/L Alpha-endosulfan µg/L Beta-endosulfan µg/L Endosulfan sulfate µg/L Endrin µg/L Endrin aldehyde µg/L Heptachlor µg/L Heptachlor epoxide µg/L PCB-1242 µg/L PCB-1254 µg/L PCB-1221 µg/L PCB-1232 µg/L PCB-1248 µg/L PCB-1260 µg/L PCB-1016 µg/L Toxaphene µg/L - Monitoring Frequency 1x during first 24 months of permit term 1x during first 24 months of permit term 1x during first 24 months of permit term 1 x during first 24 months of permit term 1 x during first 24 months of permit term 1 x during first 24 months of permit term 1x during first 24 months of permit term 1 x during first 24 months of permit term 1x during first 24 months of permit term 1x during first 24 months of permit term 1x during first 24 months of permit term 1 x during first 24 months of permit term 1 x during first 24 months of permit term 1x during first 24 months of permit term 1x during first 24 months of permit term 1x during first 24 months of permit term Monitoring Type Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Discrete Notes: 1.The permittee shall include any additional parameters in stormwater sampling as specified by Part 5.0 Water Quality Standards of this permit. 2.The permittee shall collect discrete samples and shall attempt to include the "first flush" (first 30 minutes of stormwater discharge) of a qualifying storm event whenever possible to do so. Auto Sampling equipment may be used, if available. 3.When analyzing for metals, the permittee shall assume a 1 :1 total dissolved ratio LAM BERT ORACLENARAN JA 1 S T LA CANADAPUSCH VIEW Town of Oro Valley MS4 Characterization Monitoring Sampling Locations Monitored Outfall at Pusch View Lane.Sampled: 12/12/2022 Monitored Outfall at Steam Pump Wash.Sampled: 2/22/2023 Monitored Outfall at The Villages of La Canada.Sampled: 9/12/2023 Legend MS4 Characterization Monitoring Sample Sites Major Streets    Stormwater Utility Commission 4. Meeting Date:03/20/2025   Requested by: Dennis Roberts, Public Works Submitted By:Yarina Hynd, Public Works SUBJECT: DISCUSSION OF APRIL 18, 2025 STORMWATER UTILITY COMMISSION FIELD TRIP RECOMMENDATION: N/A EXECUTIVE SUMMARY: The purpose of this year's field trip is to explore various drainage facilities across the Town that are part of the Stormwater Utility’s projects. These projects represent a range of statuses—recently completed, under construction, and planned for future repairs. This field visit aims to provide Commissioners with valuable insights into the diverse infrastructure needs within the Town, enhancing their understanding of the scale and scope of ongoing and upcoming repairs. While the list of sites is not yet finalized, the following locations are being considered as stops for the field trip (six in total):  Sierra Wash @ Naranja Sierra Wash @ Via Mandarina Sierra Wash @ Glover Road Naranja Park Drainage Mutter’s Wash (E El Conquistador Wy. to W Greenock Dr.) Pusch View Golf Course Bridge Replacement The Stormwater Utility Commission meeting scheduled for April has been cancelled to accommodate this field trip. Details for the Field Trip:  Date: Thursday, April 18 Start Time and Location: 7:30 AM at 680 W Calle Concordia Public Works Facilities End Time: Approximately 11:30 AM This field trip will serve as a valuable opportunity to examine key projects and better understand the Town’s infrastructure priorities. BACKGROUND OR DETAILED INFORMATION: N/A FISCAL IMPACT: N/A SUGGESTED MOTION: N/A Attachments Field Trip Stops Exhibit  ^_1STLA CHOLLALA CANADAORACLELAMBERT TAN GERINE NARANJA H A R D Y OVER TON LINDA VISTA CALLE CONCORDIA PUSCH VIEW RANCHO VISTOSO NORTHERNHARDY LINDA VISTA 2025 Stormwater Utility Field Trip Stops Starting Location 680 W. Calle Concordia Legend ^_Starting Point (680 W. Calle Concordia) Field Trip Stops Location Sierra Wash at Naranja Dr. (Stop 1) Sierra Wash at Via Mandarina (Stop 2) Sierra Wash at Glover Rd. (Stop 3) Naranja Park Drainage (Stop 4) Mutterer's Wash (Stop 5) Pusch View Golf Course Bridge Replacement (Stop 6) Major Streets ¯Miles00.5 1 STORMWATER UTILITY Town of Oro Valley Stormwater Characterization Monitoring Program Presentation. February 20, 2025 The most recent Arizona Department of Environmental Quality, Small MS4 Permit AZG2021-002 (Adopted September 30, 2021) has incorporated a new program for the agencies operating small MS4’s within the state. The 2021 ADEQ Small MS4 permit states: The permittee shall sample stormwater discharges from the MS4, as required, one (1) time within the first two (2) years of the effective date of the permit at 3 locations. STORMWATER UTILITY Monitoring Requirements •Sampling occurs one time at 3 different locations, due by Sept 30, 2023. •Monitoring Locations: 1 each from residential, commercial, and industrial land use areas. •In the event of adverse conditions, sampling is not required. •Qualifying storm event of 0.10” or greater. STORMWATER UTILITY What We are Sampling For The EPA citation for the analytical methods and related detection limits for the Town of Oro Valley stormwater characterization monitoring program is as follows: Provided by Legend Labs Total Cyanide -SM 4500 CN E Sb, Cd, Ag & Tl -EPA 200.8 Ba, Be & Ni -EPA 200.7 Hg – EPA 245.1 608.3 Modified/Expanded - EPA 608 625.1 Modified/Expanded - EPA 625 624.1 List with 2-CEVE/AC/AC - Varies Sample Date 2/22/2023 at Steampump Wash STORMWATER UTILITY Where and What We are Sampling For •Pesticides •Total Metals •Volatile Organic Compounds •Inorganic Chemistry (Cyanide) •Semi-volatile Organic Compounds STORMWATER UTILITY Lab Report for Sample Collected on 2/22/2023 STORMWATER UTILITY What We Have Learned •Head Space in the bottles is very bad •Most constituents are below the detectable limits of the lab equipment •Barium and Antimony are the most common elements detected in TOV Stormwater samples. (Brake Pads) STORMWATER UTILITY Questions?