GAVIN NEWsOM
GOVERNOR
«АВІРФАНА YANA GARCIA
SECRETARY FOR
Water Boards EN/ROMMENTAL PROTECTION
State Water Resources Control Board
Division of Drinking Water
December 17, 2024
Tiffany Twisselman, Public Works Supervisor
City of Gonzales
PO Box 647
Gonzales, CA 93926
[email protected]
Dear Tiffany Twisselman:
2024 SANITARY SURVEY
CITY OF GONZALES (SYSTEM No. 2710007)
On December 4, 2024, you accompanied Kyle Graff and Bryan Escamilla from the State Water Resources Control Board - Division of Drinking Water (Division) on a sanitary survey of the City of Gonzales (Gonzales) water system. A completed Sanitary Survey Report is enclosed documenting the findings of the inspection. The water system is in adequate overall condition. The attached sanitary survey includes a summary of deficiencies found during the sanitary survey. A written response to the attached sanitary survey report and deficiency list is requested by January 31, 2025, along with a plan to correct the deficiencies listed in the deficiency list. Please include the deficiency list along with the date of correction or planned date in the response to this letter.
The Division greatly appreciates Gonzales' assistance during and after the inspection. If you have any questions, please contact Kyle Graff by e-mail at [email protected] or the Monterey District at (831) 655-6939 or [email protected].
Sincerely,
Digitally signed by Jonathan Weininge
lonathan Weininger Date: 2024.12.17 16:06:39 -08'00
Water Boards
Jonathan Weininger, PE
District Engineer, Monterey District
Division of Drinking Water
E. JOAQUIN ESQUIVEL, CHAIR | ERIC OPPENHEIMER, EXECUTIVE DIRECTOR 1 Lower Ragadalo, Bidg. 1, Sulte 120, Monterey, CA 93940 | www.waterboards.ca.gov City of Gonzales - 2- December 17, 2024
Enclosures: 2024 Sanitary Survey Report
2024 Sanitary Survey Deficiency List
CC: Monterey County Environmental Health Department
Patrick Dobbins, [email protected]
STATE WATER RESOURCES CONTROL BOARD
DIVISION OF DRINKING WATER - MONTEREY DISTRICT
2024 SANITARY SURVEY REPORT
WATER SYSTEM: City of Gonzales
SYSTEM NUMBER: 2710007
REPORT DATE: December 17, 2024
INSPECTION DATE: December 4, 2024
Population and Service Connection Summary
Approximate population served: 8,576
No. of Service Connections: 1,970 connections (1,599 single family residential, 177 multi-family residential, 134 commercial/institutional, industrial, and 10 landscape/agricultural irrigation).
Permit Status
The State Water Resources Control Board, Division of Drinking Water (Division) issued Domestic Water Supply Permit No. 02-05-18P-2710007 to the City of Gonzales (Gonzales) on March 14, 2018.
The Division issued Permit Amendment No. 1 on April 6, 2022 for the addition of Well 7.
Is the water system complying with all permit requirements? Yes Is the permit up to date? Yes.
Recent and Proposed Upgrades
Since the last sanitary survey in 2021, Gonzales completed construction of Well 7 and the Division issued a permit amendment to add Well 7 as a new source.
Future upgrades are proposed for additional infrastructure to meet demand from industrial users and future development. Gonzales must notify the Division and coordinate design review as necessary.
WATER SOURCES
Sources
Gonzales has four active groundwater sources. The following table summarizes Gonzales' sources including source capacity for each well, as reported by the water system.
Table 1: Water Sources
Source Status Capacity Comments
Name PS Code
(gpm)
Well 4 CA2710007 004_004 Active 1,200
Well 5 CA2710007_005_005 Active 1,200
Well 6 CA2710007_006_006 Active 1,800 Equipped with variable frequency drive
Well 7 CA2710007_011 011 Active 2,000
Total Active Capacity 6,200 gpm (8.93 MGD)
City of Gonzales
2024 Sanitary Survey Report
Production Data - 10 years
The table below summarizes the past 10 years of production data as reported in Gonzales' electronic annual reports to the Division of Drinking Water:
Table 2: Production Data in Million Gallons (MG)
Max Day Max Month Year Total
60.8 545.1
72.98 674.4
5.78 64.7 653.4
2020 3.10 64.0 590.5
2019 5.9 561.8
2018 2.87 562.2
2017 2.71 56.1 507.5
2016 2.2 398
2015 4.11 48.5 446
2014 3.8 490
Maximum day from past 10 years: 5.9 MGD (2019)
Source & Storage Capacity Evaluation
California Code of Regulations, title 22, section 64554 requires maximum day demand (MDD) to be met with source capacity and with the highest producing well offline. MDD is calculated as the highest observed water demand in the past ten years. Using past annual reports and tabulated in Table 2, MDD was found to be 5.9 MGD (2019).
As tabulated in Table 1, Gonzales has an estimated source capacity of 6,200 gpm (8.93 million gallons per day (MGD)). Gonzales meets the MDD of 5.9 MGD with source capacity alone. Gonzales can meet MDD with its largest producing well offline.
Peak Hourly Demand: As a large water system (greater than 1,000 service connections), Gonzales is required to meet four hours of peak hourly demand (PHD) with a combination of source, storage, and emergency interconnections. PHD is hourly MDD multiplied by a peaking factor of 1.5.
Four hours of PHD is calculated to be MDD/24 hours *1.5 (peaking factor) * 4 hours, which is 5.9 MGD/24 *1.5 * 4 hours = 1.48 MGD.
Hourly max capacity is source (8.93 MG) + storage (7.0 MG) + emergency connection (0 MG) =
15.93 MG. 15.93 MGD / 24 hours = hourly capacity of 0.66 MGD. Four hours of hourly capacity is
2.66 MGD. Therefore, four hours of capacity (2.66 MGD) > four hours of PHD (1.48 MGD) and Gonzales complies with all capacity requirements. The table below summarizes Gonzales' source capacity requirements.
Table 3: Summary of Source & Storage Capacity Requirements (MGD) Demand Requirement Met?
Parameter Requirement Capacity
Maximum Day Demand 5.9 8.93 Yes
Four Hours of Peak Hourly Demand 1.48 2.66 Yes
SWRCB-DDW Monterey District Page 2 of 13
City of Gonzales
2024 Sanitary Survey Report
Physical Inspection Summary/Discussion & Appraisal
All groundwater sources were inspected during the 2024 sanitary survey. The groundwater sources are in good overall condition with the following deficiencies and recommendations:
Well 5 (Deficiencies):
• Extensive erosion was observed around the well site and primarily around the pump to waste discharge basin. The erosion appears to be undermining the foundation of the discharge line support footing. Gonzales must develop a plan that does not continue to worsen the erosion around the well site. A copy of this plan and photographs of any completed modifications must be sent to the Division by March 10, 2025.
• The air relief valve on the discharge line prior to the check valve appeared to have a leak.
Gonzales must determine the cause of the leak and determine if repairing or replacing the component is needed. Submit evidence of completed repair/ replacement to the Division by January 31, 2025.
Well 5 (Recommendations):
• The rear of the storage building that house Well 5 displays significant corrosion and no longer appears to be secured to the foundation. The Division recommends Gonzales repair or replace the structure.
• The Division recommends recoating the above-ground piping and appurtenances at the Well 5 site due to corrosion.
Well 6 (Deficiencies):
• The air relief valve on the discharge line appeared to have debris in the screen. Gonzales must determine the cause of the leak and determine if repairing or replacing the component is needed. Submit evidence of completed repair/ replacement to the Division by January 31, 2025.
• The sample tap appeared to have a leak. Gonzales staff attempted to open and close the valve but the flow continued. Gonzales must determine the cause of the leak and repair or replace the component, as necessary. Submit evidence of completed repair/ replacement to the Division by January 31, 2025.
Well 6 (Recommendations):
• Pumping to waste at Well 6 has caused erosion underneath the concrete pad that supports the well and discharge piping. The Division recommends backfilling the eroded area to better support the concrete pad.
Drinking Water Source Assessment Program (DWSAP)
DWSAPs have been completed for all sources. Gonzales' sources were found to be most vulnerable to gas stations, historic known plumes, agriculture, șewage collection systems, and septic systems.
Vo chemicals were detected in the sources due to any of the identified possible contaminating activities. DWSAPs for Well 4 and Well 5 were completed in July 2001 and the DSWAP for Well 6 was completed in October 2003. Gonzales completed a DWSAP for Well 7 in November 2020.
SWRCB-DDW Monterey District Page 3 of 13
City of Gonzales
2024 Sanitary Survey Report
TREATMENT FACILITIES
Chlorination
Type of Disinfectant: Sodium Hypochlorite (12.5%) NSF 60 certified? Yes Manufacturer: HASA Multi-Chlor Target Chlorine Residual: 0.5 mg/L Continuous chlorination is provided at each wellhead. Gonzales targets a chlorine residual of 0.5 mg/L in the distribution system. Chlorine residuals at the wellhead chlorination points are typically between 0.8 mg/L and 1.0 mg/L. Chlorine residual was verified by Division staff at Tank 1 and Tank 3 with residuals of 0.47mg/L and 0.45mg/L. All chlorinators are housed. All chlorination facilities were clean and in good overall condition. An adequate amount of chlorine is stored at each chlorination site. Gonzales has at least a month available onsite liquid chlorine. No chlorination related deficiencies were found during the sanitary survey.
DISTRIBUTION SYSTEM
Pressure Zones
Gonzales has one pressure zone. Pressure typically ranges between 60 psi to 95 psi with an average of around 75 psi within the distribution system. There are no areas which experience pressure less than 20 psi (minimum distribution pressure per California Code of Regulations, title 22, section 64602).
Distribution Mainlines
A large majority of Gonzales' mainline is PVC (85%) with the remaining pipeline reported to be comprised of cast iron (5%), ductile iron (5%) and galvanized iron (5%). No asbestos cement pipe was reported in the 2023 EAR. Aging steel mainlines are primarily replaced with PVC mains.
Gonzales is starting to implement a proactive infrastructure replacement program, which includes replacing aging mains, services, and valves.
New water main installations must follow California Code of Regulations, title 22, chapter 16 (Waterworks Standards), article 4 (Materials and Installation of Water Mains and Appurtenances) and article 5 (Disinfection Requirements). If Waterworks Standards are unable to be met, please contact the Division prior to commencing construction.
According to Gonzales, the water system does not have any known lead service lines.
Distribution System Leak Program
Gonzales documents all leak and leak repairs. All leaks are responded to and corrected by Gonzales.
Larger leaks repaired by contractors. According to the 2023 EAR, nine service connection breaks/leaks were reported, and no main breaks/leaks were reported in 2023.
Recycled Water
Gonzales' water system service area does not use recycled water.
Water Main Separation Criteria
If a new or replacement water main is unable to meet the separation criteria established in the California Code of Regulations, title 22, section 64572, the water system must apply for and receive a Waterworks Standards alternative approval prior to commencing construction.
SWRCB-DDW Monterey District Page 4 of 13
City of Gonzales
2024 Sanitary Survey Report
Valve Exercising and Maintenance Program
No. of Valves/size: 485 / 4-12"
Valve exercising frequency: Annually
40 Valves were reported to be exercised in the 2023 EAR.
All new mainline installations must comply with the isolation valve requirements in the California Code of Regulations, title 22, section 64577 and all new water main valves must be constructed in accordance with the California Code of Regulations, title 22, section 64578.
Dead End Flushing Program
No. of dead ends: 3
Flushing Frequency: Semi-Annually
All 3 dead ends were reported to be flushed in 2023. The City of Gonzales Fire Department exercises and flushes all fire hydrants and sends records to Gonzales. A certified operator must oversee all distribution flushing.
Operational Controls
Facilities are operated manually and with SCADA.
Water System Interconnections
Gonzales does not have any interconnections to nearby water systems. There are two nearby labor camps, Alpine Camp and Corda Camp, that operate small public water systems but are not currently connected to the Gonzales water system.
FINISHED WATER STORAGE
Gonzales has a total storage capacity of 7.0 million gallons. A summary of Gonzales' tanks are listed in the following table:
Table 4: Tanks Summary
Tank Material Inspected? Capacity (MG) Comments
Tank 1 Welded Steel Yes 1.0 All tanks located in a common Tank 2 Welded Steel Yes 3.0 ] area. Tanks float with each Tank 3 Welded Steel _ Yes 3.0
TOTAL STORAGE 7.0 MG
Physical Inspection Summary/Discussion & Appraisal
All three tanks were inspected from the ground and climbed during the inspection. At time of the Sanitary Survey, Gonzales indicated that USG had completed a tank washout during the last year and that this work is completed on a rotating annual basis for all of the tanks. Gonzales will forward the report when available. Gonzales must comply with the California Code of Regulations, title 22, section 64582 when a tank is taken out of service for repair or inspection. The following deficiency was noted:
SWRCB-DDW Monterey District Page 5 of 13
City of Gonzales
2024 Sanitary Survey Report
• Gonzales must submit copies of its most recent tank inspection reports to the Division by January 31, 2025.
PUMPS AND PUMPING FACILITIES
Discussion and Appraisal
Gonzales does not have any booster pumps in its distribution system. Well pumps are in adequate overall condition.
MONITORING, REPORTING, AND DATA VERIFICATION
Bacteriological Source and Distribution Monitoring
Population: 8,439 Service Connections: 1,952
Distribution Samples: 13 per month Source Samples: 1 per quarter Date of Bacteriological Sample Siting Plan: September 11, 2024 Groundwater Rule Plan: All wells sampled after distribution total coliform positive Gonzales violated the Total Coliform Rule in 2024 for failure to follow the Division-approved BSSP, submit a Level 1 Assessment within 30 days, and complete necessary Ground Water Rule source sampling on all wells in service at time of total coliform-positive distribution sample. Citation and Compliance Order No. 03_05_24J_022 was issued to the City on October 1, 2024. Gonzales complied with all directives within the Citation and Compliance Order.
Source Chemical Monitoring
Gonzales' source monitoring requirements, detections, and an evaluation for each chemical set of required source monitoring can be found in the table below.
Table 5: Source Chemical Monitoring Requirements, Detections, and Evaluation Minimum
Chemical or Significant Detections Evaluation
Monitoring above DLR
Chemical Set
Requirements
Inorganic Once / 3 years Well 4 Cr6: 4.5 ug/L 10/1/24 In compliance Chemicals Well 5 Cr6: 4.4 ug/L 10/1/24
Well 7: Quarterly
Nitrate (as Well 7: 7.4 mg/L (Oct. 2024) | In compliance Nitrogen) All other wells:
Annually*
Nitrite Once / 3 years None In compliance
Volatile Organic Once / 3 years
Compounds None In compliance
(VOC)
Non-waived SOCs: 1,2,3-
Synthetic 2 quarterly TCP, 2,4-D, Alachlor,
Organic None Atrazine,
samples / 3 Bentazon,
Compounds years** Carbofuran, Diquat, and
(SOC) Simazine.
SWRCB-DDW Monterey District Page 6 of 13
City of Gonzales
2024 Sanitary Survey Report
Minimum Significant Detections
Chemical or Evaluation
Chemical Set Monitoring above DLR
Requirements
Well 4: 3.48 pCi/L in 2024
Gross Alpha All wells once/ 6 Well 5: 5.23 pCi/L in 2024 years Well 5: 3.48 pCi/L in 2023 In compliance
Well 7: 4.88 pCi/L in 2022
Radium 226 & In compliance
228 Once / 9 years None
Well 4: 2.4 pCi/L in 2022
Uranium All Wells: once / 6 Well 5: 3.6 pCi/L in 2024
years Well 6: 2.1 pCi/L in 2022 In compliance
Well 7: 3.0 pCi/L in 2022
Secondary Once / 3 years None above 50% of the In compliance Secondary MCL
*Nitrate Monitoring: Well 5 and Well 6 have had historical nitrate detections above 50% of the MCL, but both wells have since had at least four consecutive quarters of nitrate monitoring results below 50% of the MCL and returned to annual monitoring. Gonzales must continue to monitor Well 7 for nitrate at least once per quarter.
**SOC Monitoring: Per California Code of Regulations, title 22, section 64445.1.b.2, community water systems serving more than 3,330 people must conduct two quarterly rounds of SOC monitoring once every three years.
The tables below tabulate the last source monitoring dates and next due source chemical monitoring dates.
Table 6: Last Source Chemical Monitoring Dates
Secondary Nitrate Gross Rad Rad voc Non-Waived
Source MCLs Inorganics Nitrite 226 228 Uranium
(as N) Alpha SOCS
Well 4 Apr- Apr- Apr- Jan- Apr- Jul-23
Apr-23 Apr-23 Jul-24 18
23 18 2022 23
Well 5 Apr-23 Apr-23 Apr- Jul-24 May May July- Apr- Aug-23 23 -18 -18 2024 23
Well 6 Apr- Oct- Apr- Oct- Jan- Apr-
Apr-24 Apr-24 18 Jul-23
24 23 21 2022 23
Well 7 Jan-22 Jan-22 Oct- Jan- Oct- Oct- Oct- Oct- Oct- 22 22 2022 Oct-22
24 22 22 22
Table 7: Next Due Chemical Monitoring Dates
Gross Rad Rad Non-
Secondary Nitrate Uranium
Source MCLs Inorganics (as N) Nitrite 228 226 VOC Waived Alpha SOCS
Well 4 2026 2026 2025 2026 2030 2027 2027 2028 2026 2026 Well 5 2026 2026 2025 2026 2030 2027 2027 2030 2026 2026 Well 6 2027 2027 2025 2027 2029 2030 2027 2028 2026 2026 Well 7 2025 2025 Q1 2025 2028 2028 2028 2028 2025 2025
2025
SWRCB-DDW Monterey District Page 7 of 13
City of Gonzales
2024 Sanitary Survey Report
Unregulated Source Contaminants
Gonzales has not had any recent significant unregulated chemical monitoring detections.
Disinfection By-Product Rule (DBPR) Monitoring
Per reduced DBPR monitoring requirements in the California Code of Regulations, title 22, table 64534.2-D, one paired TTHM and HAA5 sample is required annually, in accordance with Gonzales' DBPR monitoring plan. Gonzales' approved DBPR sample site is 705 Jersey Drive. Results must be submitted using PS Code CA2710007_DST_802.
All samples are in the Division's electronic database. The most recent DBPR monitoring results were collected on August 6, 2024 and were non-detect for both TTHM and HAA5. Gonzales is in compliance with DBPR monitoring requirements.
Chlorine Residual Distribution System Monitoring
Gonzales does not routinely submit required quarterly chlorine residual distribution monitoring results to the Division quarterly. Gonzales has not exceeded the chlorine Maximum Residual Disinfectant Level of 4.0 mg/L.
Lead and Copper Rule Monitoring
Required Frequency: Once every three years
Number of Sample Sites Required: 20
Next Round of Monitoring Due: Between June 1 and September 30, 2027.
Water Quality Parameter Monitoring: N/A
Evaluation: With a population of 8,576, Gonzales is required to collect lead and copper tap sampling at a minimum of 20 sites in accordance with the California Code of Regulations, title 22, table 647675-A. All 90 percentile lead and copper monitoring results are less than the established action levels. Lead and copper results from the past five rounds of monitoring are summarized in the following table.
Table 8: Lead and Copper Rule Monitoring Results (2013 - Present) No. of 90th 90th
No. of Percentile Comments
Date Samples Percentile
Samples Lead (mg/L) Copper (mg/L)
Required
July to 20 19 ND 0.121 Reporting error by laboratory
Aug-24 - see deficiency below.
Jun-21 20 21 ND 0.088
Only 18/20 samples
June to collected. Instructed to
20 18 ND 0.142 collect an LCR sample set in
Sep-20
2021.
Jul-17 20 20 ND 0.125
Only 17/20 samples
ND collected out of compliance
Oct-16 20 17 0.129 period. Instructed to collect
an LCR sample set in 2017.
Jul-13 20 18 ND 0.085
ND = Non-Detect
SWRCB-DDW Monterey District Page 8 of 13
City of Gonzales
2024 Sanitary Survey Report
Monitoring Data Record Retention
Are chemical/bacteriological laboratory data retained? Yes Are operational records retained: Yes
Duration of retention: 10+ Years
Method of Storage: Digital + Hard Copy
Is all source and disinfection by-product rule data reported to the Division via EDT? Yes Evaluation: Gonzales' data retention program is adequate.
Reporting to the Division
Date of last Annual Report to the Division? April 9, 2024 (2023 EAR) Date of last Consumer Confidence Report: June 30, 2024 (2023 CCR) Evaluation: The following deficiency was noted:
• According to the lab reports and chains of custody submitted by Gonzales, Gonzales collected and analyzed lead and copper tap samples from 20 sample sites. However, the sample from 318 Rincon Road was uploaded by the lab with a sample date of July 9, 1960. Additionally, the lead and copper monitoring results shown on the laboratory report collected from 400 Rincon Road do not match the results that were electronically submitted to the State. Gonzales must ensure its laboratory correctly re-uploads its 2024 lead and copper monitoring results collected from 318 Rincon Road and 400 Rincon Road by December 31, 2024.
SYSTEM MANAGEMENT AND OPERATION
Cross-Connection Control and Backflow Testing Program
Name of Cross-connection control coordinator: Tiffany Twisselman Trainings/Certifications: Unknown. Tiffany Twisselman is not a licensed cross-connection control-specialist or licensed backflow prevention assembly tester.
Does the utility have a current Cross-Connection Control Ordinance or Operating Rules? Yes Below is a summary of the past three years of backflow prevention device testing completed by Gonzales.
Table 9: Summary of Backflow Prevention (BP) Assembly Testing 2021 2022 2023
Total No. of BP Assemblies 168 168 168
Total No. of BP Assemblies Tested 168 168 168
No. BP Assemblies
2 10 9
Repaired/Replaced
No. BP Assemblies Failed 2 9
Percentage Tested during Year 100% 100% 100%
Gonzales must comply with the Cross-Connection Control Policy Handbook (CCCPH), effective July 1, 2024. One of the CCCPH requirements for all water systems is to submit a cross-connection control plan by July 1, 2025. For water systems with more than 1,000 service connections, the cross- connection control plan must be developed in consultation with a cross-connection control specialist.
SWRCB-DDW Monterey District Page 9 of 13
City of Gonzales
2024 Sanitary Survey Report
The full text of the CCCPH is posted on the Division's website. Cross-Connection Control Policy Handbook (CCCH) | State Water Resources Control Board
Per the CCCPH, section 3.3.3, all backflow preventers must be tested at least annually by a tester who has demonstrated their competency in testing backflow devices. Backflow prevention assemblies found to be defective must be repaired or replaced within 30 days of the notification of failure.
According to the 2023 EAR, Gonzales completed a cross-connection control survey of the water system in June 2022. By January 31, 2025, Gonzales must submit a copy of the results of the 2022 cross connection control survey to the Division. The Division recommends Gonzales schedule a system wide cross connection control survey at least once every ten years by an adequately trained and certified cross connection specialist.
Customer Complaint Program
Are all complaints recorded? Yes
Are all complaints responded to? Yes
Digital/Hard Copy Tracking? Hard Copy
All customer complaints are recorded. The table below summarizes Gonzales' past three years of customer complaints. Gonzales has an adequate customer complaint program.
Table 10: Summary of Customer Complaints (2021 - 2023)
Year Taste/Odor Color Turbidity High/Low Pressure Other Total 2023 0 0 2
2022 0 1 1 0 2
2021 1 4 0 5
Auxiliary Power Supply
Auxiliary Power for:
Water Sources? Wells are equipped with portable generator connections Pumping Stations? N/A
Water Treatment Plants? N/A
How frequently is backup power tested? Monthly
Backup power automatic or manual start: Well 6 is manual, other wells are automatic Can system pressure be maintained either by backup power or by storage during power outages of two hours or less? Yes
Well 4 and Well 6 are equipped with solar power. Gonzales reported issues with the use of the solar connection at Well 6 and is investigating a solution. A backup generator is available on site. Due to emissions requirements the generator located at Well 6 is now stationary. Well 7 is also equipped with its own permanent generator. All well sites were reported to be equipped with connections for a portable generator, if required.
Water System Mapping
Does the utility have up to date distribution maps? Yes, and in the process of improving and converting from CAD to GIS.
SWRCB-DDW Monterey District Page 10 of 13
City of Gonzales
2024 Sanitary Survey Report
System Security
All water system facilities are gated and locked.
Emergency Response Program
Date of most recent Emergency Notification Plan (ENP): 08/17/2022 Date of Emergency Response Plan: 02/11/2022
Gonzales holds emergency training exercises with water system staff and the local fire department.
WATER SYSTEM MANAGEMENT
Management Structure
Who owns the water system? City of Gonzales
Water System Type: City
Current organizational chart on file? Yes
Manager: Patrick Dobbins, Public Works Director
Are personnel familiar with the Safe Drinking Water Act? Yes Is information adequately managed? Yes
Water System Financial Outlook
Are adequate reserve funds available to support maintenance and staffing requirements? Yes Is there a Capital Improvement Plan (CIP)? Yes
OPERATOR CERTIFICATION
Minimum Chief Distribution Operator: D2 Minimum Chief Treatment Operator: D1 or T1 Minimum Shift Distribution Operator: D1 Minimum Shift Treatment Operator: D1 or T1 Per the California Code of Regulations, title 22, section 64413.3, water systems are designated their distribution classification based upon population size and other distribution system related factors.
Gonzales is classified as a Distribution 2 (D2) water system. California Code of Regulations, title 22, section 64413.5 - 7 states (a) each water supplier shall designate at least one chief operator that meets the requirements for each treatment and/or distribution system utilized by the water system; (b) Each water supplier shall designate at least one shift operator that meets the requirements for each treatment and/or distribution system each operating shift; (c) The chief operator or shift operator shall be on-site or able to be contacted within one hour.
A list of current operators as reported in the 2023 EAR is summarized in the table below.
Table 11: Certified Operators
Distribution Grade and Treatment Grade and
Name
Expiration Date Expiration Date
Frank Valladarez T1, exp. Jan 2028
Tiffany Twisselmann D1, exp. November 2026
Jaime Vasquez D2, exp. June 2025
SWRCB-DDW Monterey District Page 11 of 13
City of Gonzales
2024 Sanitary Survey Report
Staffing Evaluation
According to Gonzales, the water system is adequately staffed. Jaime Vasquez is the only operator with a D2 certification and is the chief distribution operator. The Division recommend Gonzales employ additional operators with a D2 or higher certification to ensure the distribution system operator requirements are met at all times.
Large Water System Resiliency and Preparedness
The effects of extreme weather on community water system (CWS) facilities and operations is a concern and priority of the State Water Resources Control Board (SWRCB), which is documented by the SWRCB in its Comprehensive Climate Change Resolution No. 2017-12, adopted in March 2017.
DDW is reviewing each water system's level of resiliency and preparedness for changing climate conditions and extreme weather increase awareness to the potential effects to facilities and operations and encourage the use of EPA's Climate Resilience Evaluation and Awareness Tool (CREAT).
As part of the 2023 EAR, CWSs were asked to identify their vulnerabilities, and rank them as either high, medium, or low sensitivity, and proposed or implemented projects to prepare for the impacts from climate change. Gonzales water system provided responses to these questions. Gonzales identified that their facilities are vulnerable to salt water intrusion into aquifers, high flow events and flooding, aging flood protection infrastructure (levees), or insufficient impoundment capacity, peak demand volume surges, increases in agricultural water demand, increased fired risk, and disrupted power supply. Gonzales has implemented, or is considering implementing, the following projects to address current identified needs and which also reduce the impacts to these vulnerabilities: installing new, deeper wells, implementing conservation measures, installing alternative or back-up energy supply, onsite energy generation, fire prevention, and developing local supplemental water supply, enhanced treatment, or increased storage capacity.
Gonzales did not indicate if they have used CREAT (or similar tool) to identify vulnerabilities to the water system sources and facilities. The SWRCB strongly encourages utilities to evaluate infrastructure and operational vulnerabilities to extreme weather and other emergency conditions using tools such as CREAT and engaging in a conversation both within your water system organization and with customers on how to plan and prepare for being resilient to provide clean and safe water reliably and adequately under all current and future conditions.
Fire - A defensible space of 100 feet (California Public Resources Code, 4291) is maintained around all sources and structures managed by the Water System.
Flooding - Are any drinking water facilities vulnerable to flooding? No Backup Power -- Is backup power available, for example, through portable or permanent power generators? Yes
If liquid fuel is used, is it properly contained and stored away from the source? Yes Drought - Is the Water System prepared for drought related shortages or outages? Yes If using a groundwater source: The Division recommends monitoring depth to groundwater on a routine basis.
Degrading Source Water Quality - Has source water quality degraded over time, or specifically during the most recent drought? No issues reported
SWRCB-DDW Monterey District Page 12 of 13
City of Gonzales
2024 Sanitary Survey Report
ATTACHMENTS
A. Sanitary Survey Deficiency List
Report prepared by:
Bryan Escamilla, EIT, REHS
Water Resource Control Engineer,
Division of Drinking Water - SAFER
Kyle Graff, P.E.
Water Resource Control Engineer
Division of Drinking Water, Monterey District
SWRCB-DDW Monterey District Page 13 of 13
STATE WATER RESOURCES CONTROL BOARD
DRINKING WATER FIELD OPERATIONS BRANCH
ATTACHMENT A: 2024 SANITARY SURVEY DEFICIENCY LIST, RECOMMENDATIONS,
REMINDERS, AND COMPLETED DEFICIENCIES
Purveyor: City of Gonzales
Date of Inspection: December 4, 2024
Reviewing Engineer: Bryan Escamilla, REHS, EIT
Updated by:
Date:
ORDER OF HAZARD:
A. CRITICAL HEALTH HAZARD - CORRECTIVE ACTION MUST BE TAKEN IMMEDIATELY B. SERIOUS HEALTH HAZARD - ACTION MUST BE TAKEN AS SOON AS POSSIBLE
C, POTENTIAL HEALTH HAZARD - MUST BE CORRECTED AS WORKLOAD PERMITS D. SYSTEM OR OPERATIONAL DEFECT RESULTING IN POOR WATERWORKS PRACTICE 2024 SANITARY SURVEY - DEFICIENCY LIST
Date Order of Date to Address Date
Description of Deficiency Hazard Deficiency Corrected
Found
WATER SOURCES
Well 5: Extensive erosion was observed around the well
site and primarily around the pump to waste discharge
basin. The erosion appears to be undermining the
Dec. 4, foundation of the discharge line support footing. D March 10, 2025 2024 Gonzales must develop a plan that does not continue to worsen the erosion around the well site. A copy of this plan and photographs of any completed modifications
must be sent to the Division.
Well 5 Air Relief Valve: The air relief valve on the
discharge line prior to the check valve appeared to have Dec. 4, a leak. Gonzales must determine the cause of the leak January 31, 2024 and must determine if repairing or replacing the 2025 component is needed. Submit evidence of completed
repair/ replacement to the Division.
Well 6 Air Relief Valve: The air relief valve on the
discharge line appeared to have debris in the screen.
Dec. 4, Gonzales must determine the source of the debris and January 31, must determine if repairing or replacing the component 2025 is needed. Submit evidence of completed repair/
replacement to the Division.
Monterey District | December 2024 Page 1 of 3
Date Order of | Date to Address Date
Found Description of Deficiency Hazard Deficiency Corrected Well 6 Sample Tap: The sample tap appeared to have
a leak. Gonzales staff attempted to open and close the
Dec. 4, valve but the flow continued. Gonzales must determine January 31, 2024 the cause of the leak and repair or replace the 2025 component, as necessary. Submit evidence of
completed repair/ replacement to the Division.
STORAGE
Tank Inspection Reports: Gonzales must submit
Dec. 4, copies of its most recent tank inspection reports to the N/A January 31, 2024 2025
Division.
MONITORING AND REPORTING
Lead and Copper Reporting: According to the lab
reports and chains of custody submitted by Gonzales,
Gonzales collected and analyzed 20 valid lead and
copper tap samples. However, the sample from 318
Rincon Road was uploaded with a sample date of July
Oct. 11, 9, 1960. Additionally, the lead and copper monitoring D December 31, 2024 results shown on the laboratory report collected from 2024 400 Rincon Road do not match the results that were
electronically submitted to the State. Gonzales must
ensure its laboratory correctly re-uploads its 2024 lead and copper monitoring results collected from 318 Rincon Road and 400 Rincon Road.
CROSS CONNECTION CONTROL
Cross-Connection Control Survey: According to the
Dec. 4, 2023 EAR, Gonzales completed a cross-connection January 31, control survey of the water system in June 2022. D 2025 2024
Gonzales must submit a copy of the results of the 2022
cross connection control survey to the Division.
2024 SANITARY SURVEY - LIST OF RECOMMENDATIONS
Recommended Date to
Description of Recommendation Address Recommendation
Well 5: The rear of the storage building that house Well 5 displays significant corrosion and no longer appears to be secured to the foundation. The Division recommends Gonzales repair or replace the As Budget and Workload Allow structure. Additionally, the Division recommends recoating the above- ground piping and appurtenances at the Well 5 site due to corrosion.
Well 6: Pumping to waste at Well 6 has caused erosion underneath the concrete pad that supports the well and discharge piping. The June 30, 2025 division recommends backfilling the eroded area to better support the concrete pad.
Operator Certification: The Division recommend Gonzales employ additional operators with a D2 or higher certification to ensure the Now distribution system operator requirements are met at all times.
Monterey District | December 2024 Page 2 of 3
WATER QUALITY MONITORING AND OTHER REMINDERS
Monitoring Due / Reminder
Cross Connection Control Policy Handbook: The State Water Board adopted the Cross Connection Control Policy Handbook (CCCPH) on December 23, 2023. The CCCPH went into effect on July 1, 2024. Community and nontransient, non-community systems must develop a cross- connection control program and plan that complies with the CCCPH and submit it to the Division for review and approval by July 1, 2025. For more information, please visit, https://www.waterboards.ca.gov/drinking_water/certlic/drinkingwater/cccph.html Initial Hexavalent Chromium Source Monitoring: The State Water Board adopted a new Hexavalent Chromium MCL which will go into effect on October 1, 2024. All community and non- transient non-community systems are required to take an initial sample within 6 months (by April 1, 2025) of the adoption. Gonzales has submitted initial monitoring results for all wells except Well 7.
For more information, please visit,
https://www.waterboards.ca.gov/drinking water/certlic/drinkingwater/Chromium6.html Monterey District | December 2024 Page 3 of 3