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California Integrated Water Quality System Project (CIWQS)
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Place ID 222434 		  
  
  
  
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General Information
Region Place ID Place Name Place Type Place Address Place County
5S 222434 El Dorado Hills WWTP Wastewater Treatment Facility 4625 Latrobe El Dorado Hills, CA, 95762 El Dorado
Expand/Contract Related Parties
Related Parties
Party Party Type Party Name Role Classification Relationship Start Date Relationship End Date
539751 Person Nicole Graham Is Onsite Manager For 10/26/2018
569271 Person Tracy Crane Is Onsite Manager For 11/17/2017
520804 Person John Peterson Is A Data Submitter For 12/21/2016
551827 Person Margaret Prehn Washko Is Onsite Manager For 06/24/2015 05/17/2018
550200 Person Thomas Keith McKinney Is Onsite Manager For 02/25/2015 05/19/2017
546938 Person Daniel Corcoran Is Onsite Manager For 07/21/2014
545815 Person Charles Planje Is A Data Submitter For 03/24/2014 05/18/2017
539751 Person Nicole Graham Is A Data Submitter For 04/29/2013 11/08/2018
324511 Person Victoria Caulfield Contact 01/31/2013 08/05/2015
324521 Person Darcy Millward Is A Data Submitter For 01/20/2010
520853 Person Larry Olson Is A Data Submitter For 01/20/2010 02/08/2013
520820 Person Jerry Tamura Is A Data Submitter For 01/15/2010 02/08/2013
324511 Person Victoria Caulfield Is Onsite Manager For 01/11/2010 08/05/2015
14606 Organization El Dorado Irrigation District Owner Special District 12/01/1994
Total Related Parties: 14
Expand/Contract Regulatory Measures
Regulatory Measures
Reg Measure ID Reg Measure Type Region Program Order No. WDID Effective Date Expiration Date Status Amended?
440470 Co-Permitee SB SLIC 2020-0015-DWQ 5B090102005 07/09/2020 Active N
425238 Enrollee - NPDES 5S NPDMUNILRG R5-2023-0025 5B090102005 10/01/2018 10/01/2028 Active N
412049 Resolution 5S NPDMUNIOTH R5-2017-0013 02/24/2017 Historical N
389302 NPDES Permit 5S NPDMUNILRG R5-2013-0003 5B090102005 03/22/2013 03/01/2018 Historical N
352394 NPDES Permit 5S NPDMUNILRG R5-2007-0069 5B090102005 08/11/2007 06/01/2012 Historical N
148585 NPDES Permit 5S NPDMUNILRG R5-2001-0135 5B090102005 06/14/2001 06/01/2006 Historical N
146462 NPDES Permit 5S NPDMUNILRG 95-151 5B090102005 06/23/1995 06/01/2000 Historical N
140447 NPDES Permit 5S NPDMUNILRG 90-164 5B090102005 06/22/1990 06/01/1995 Historical N
139625 NPDES Permit 5S NPDMUNILRG 85-209 5B090102005 08/23/1985 08/01/1990 Historical N
Total Reg Measures: 9
Expand/Contract Violations
Violations
Violation ID Occurred Date Violation Type (-) Violation Description Corrective Action Status Classification Source
1112532 12/31/2022 UAUTHDISC A manhole adjacent to the influent equalization tanks overflowed approximately 200 gallons of screened influent over a 20-minute period, and the overflow was carried by stormwater runoff into Carson Creek. On December 31, 2022, the El Dorado Hills Wastewater Treatment Plant (EDHWWTP) exceeded the minimum freeboard requirement at the site waste ponds and experienced two separate spills of highly diluted wastewater at the facility. The first spill was initiated from a manhole adjacent to the influent equalization tanks. The spill was carried directly to Carson Creek with storm-water runoff. The overflow from the manhole started at 1059 on December 31, 2022, at an estimated rate of 10 gpm and ceased 20 minutes later at 1119. The total spill volume for this event is estimated at 200 gallons. The second spill was initiated from the overflow weir structure at the site waste ponds, which directs flow from the ponds to Carson Creek. The overflow weir structure began discharging a mixture of storm-water runoff and highly diluted partially-treated wastewater at 1445 on December 31, 2022, at an estimated rate of 2886 gpm. It ceased at 0205 on January 01, 2023. The total estimated volume discharged for this event was 2.09 million gallons. Spill volume estimations were made by staff visual observations and the use of a SCADA level transducer in the site waste pond overflow weir structure. The fundamental cause for both events is an unprecedented Category IV atmospheric river rain event that impacted the EDHWWTP service area on December 30 and 31, 2022. The nearest official weather station, Placerville Weather Station, recorded a rainfall total of 10.03 inches over the 48 hours. As a result, flows to the facility reached peaks of over 20 mgd (500% of average volumes), and the influent flow rate measured at over 15 mgd from 0630 on December 31, 2022, until 0015 on January 1, 2023. Violation B eSMR
1113156 12/31/2022 UAUTHDISC Approximately 2.09 million gallons of mixed filter backwash water, site drain water, and site stormwater overflowed to Carson Creek over approximately an 11-hour period Violation B Report
1071098 01/21/2020 OEV pH Instantaneous Maximum limit is 8.3 SU and reported value was 9.3 SU at EFF-001. A small leak in a sodium hydroxide solution line that is used to provide alkalinity for the plant process control was identified as the problem. Sodium hydroxide from the solution line had permeated through an adjacent manhole that provides access to the plant effluent pipeline. The leak was repaired and the effluent discharge to Carson Creek was resumed on January 22. Multiple samples were analyzed for pH throughout the process of investigation and repair prior to resuming discharge; none were outside permit limitations with the exception of the initial sample. Violation B eSMR
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
Total Violations: 3 Priority Violations: 0
*Click the "(+/-) Violation Description" link to expand and contract the violation description.
*As of 5/20/2010, the Water Board's Enforcement Policy requires that all violations be classified as 1, 2 or 3, with class 1 being the highest. Prior to this, violations were simply classified as Yes or No. If a 123 classification has been assigned to a violation that occurred before this date, that classification data will be displayed instead of the Yes/No data.
Violation Types
OEV = Other Effluent Violation UAUTHDISC = Unauthorized Discharge
Expand/Contract Enforcement Actions
Enforcement Actions
Enf Id Enf Type Enf Order No. Effective Date Status
451152 Notice of Violation null 02/09/2023 Historical
438123 Notice of Violation null 05/06/2020 Historical
438008 Notice of Violation null 05/06/2020 Historical
422117 Notice of Violation 06/18/2018 Historical
414894 Notice of Violation 07/21/2017 Historical
402685 Notice of Violation 08/27/2015 Historical
396710 Notice of Violation 06/09/2014 Historical
395165 Notice of Violation 03/03/2014 Historical
393156 Admin Civil Liability R5-2013-0552 10/30/2013 Historical
391623 Notice of Violation 06/26/2013 Historical
387147 Notice of Violation 08/15/2012 Historical
385503 Notice of Violation 06/05/2012 Historical
390022 Notice of Violation 04/06/2012 Historical
382635 Notice of Violation 12/28/2011 Historical
380724 Notice of Violation 08/03/2011 Historical
379451 Staff Enforcement Letter 05/20/2011 Historical
377799 Staff Enforcement Letter 02/24/2011 Historical
377284 Staff Enforcement Letter 01/13/2011 Historical
377145 Admin Civil Liability R5-2011-0500 01/07/2011 Historical
377175 Notice of Violation 12/28/2010 Historical
376595 Notice of Violation 11/10/2010 Historical
376600 Notice of Violation 11/09/2010 Historical
376550 Notice of Violation 10/29/2010 Historical
375775 Notice of Violation 08/31/2010 Historical
375462 Notice of Violation 08/05/2010 Historical
375058 Notice of Violation 07/13/2010 Historical
374789 Notice of Violation 06/22/2010 Historical
374827 Notice of Violation 04/29/2010 Historical
374824 Staff Enforcement Letter 04/22/2010 Historical
373765 Time Schedule Order R5-2010-0030 03/18/2010 Historical
374845 Notice of Violation 03/15/2010 Historical
373226 Notice of Violation 02/18/2010 Historical
372038 Admin Civil Liability R5-2009-0572 11/10/2009 Historical
351458 Notice of Violation 05/14/2008 Historical
231848 Oral Communication 01/24/2001 Historical
223701 Admin Civil Liability R5-1990-0513 09/25/1990 Historical
224017 Cease and Desist Order R5-1980-0029 03/19/1980 Historical
Total Enf Actions: 37
Expand/Contract Inspections
Inspections
Inspection ID Inspection Type Lead Inspector Actual End Date Planned Violations Attachment
51313758 B Type compliance inspection Jon Rohrbough 05/05/2023 Y 0 Download
43352144 B Type compliance inspection Jon Rohrbough 03/08/2021 N 0 Download
35337061 B Type compliance inspection Ayda Soltani 02/06/2019 N 0 Download
33687646 Pretreatment compliance Ayda Soltani 05/24/2018 Y 0 Download
27964826 B Type compliance inspection Ayda Soltani 03/22/2017 Y 0 [Attachments]
27241353 Complaint inspection Mohammad Farhad 11/03/2016 N 0 N/A
26072721 Preatment Audit Chuck Durham 07/26/2016 N 0 Download
22742145 B Type compliance inspection Alejandra Serratos 12/04/2015 N 0 Download
13824976 B Type compliance inspection Barry Hilton 09/16/2013 N 0 Download
11738201 B Type compliance inspection Barry Hilton 11/15/2012 N 0 [Attachments]
9642612 Complaint inspection Barry Hilton 09/05/2012 N 0 N/A
7432642 B Type compliance inspection Beth Thayer (Multiple) 02/09/2012 N 0 Download
4405896 B Type compliance inspection Luz Slauter 02/01/2011 N 0 N/A
2496409 B Type compliance inspection Luz Slauter 03/23/2010 N 1 N/A
1773588 B Type compliance inspection Dave Lyons 05/08/2009 N 2 N/A
1469866 B Type compliance inspection Tim Havey 05/14/2008 N 0 N/A
1148001 B Type compliance inspection Kelly Jacques 03/01/2007 N 0 [Attachments]
1031050 B Type compliance inspection Tim Harvey 05/31/2006 N 0 [Attachments]
337365 B Type compliance inspection Tetra Tech 5S-NPDES 02/02/2005 Y 0 N/A
330599 B Type compliance inspection Kyle Ericson 06/30/2003 Y 0 N/A
325080 A Type compliance inspection Kyle Ericson 06/26/2002 Y 0 N/A
309286 A Type compliance inspection Kyle Ericson 06/27/2001 Y 0 N/A
309292 B Type compliance inspection Jon Ericson 01/12/2000 Y 0 N/A
309291 B Type compliance inspection Richard McHenry 06/02/1998 Y 0 N/A
309288 B Type compliance inspection John Moody 06/28/1995 Y 0 N/A
309289 B Type compliance inspection John Moody 06/22/1994 Y 0 N/A
309290 B Type compliance inspection John Moody 05/18/1993 Y 0 N/A
309287 B Type compliance inspection Mark Batkin 09/10/1992 Y 0 N/A
Total Inspections: 28 Last Inspection: 05/05/2023
  
The current report was generated with data as of: 05/17/2024
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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