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   Party At-A-Glance Report

  
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General Information
Party ID Party Name Party Classification Mailing Address Work Phone Email/Website
S465854 Mt San Antonio College Special District 1100 N Grand Ave Walnut, CA 91789 N/A N/A
  
  
  
  
Expand/Contract Related Places
Related Places
Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date
S935479 Mt SAC Tech & Health building Los Angeles 4 Facility Discharger 08/25/2025 None
S913175 Mt SAC Tech and Health building Los Angeles 4 Facility Discharger 05/25/2023 None
S906990 Mt SAC Lot W Sand Volleyball Court Los Angeles 4 Facility Discharger 08/24/2022 None
S891598 Mt SAC Transit Center Los Angeles 4 Facility Discharger 03/09/2021 None
S891597 Mt SAC Temple Ave Green Corridor Los Angeles 4 Facility Discharger 03/09/2021 None
S891596 Mt SAC Pedestrian Bridge Los Angeles 4 Facility Discharger 03/09/2021 None
S881257 Parking Structure Lot S Los Angeles 4 Facility Discharger 04/10/2020 None
S877555 Mt SAC Campus Store Los Angeles 4 Facility Discharger 11/26/2019 None
S854134 Mt SAC Physical Education Projects Los Angeles 4 Facility Discharger 03/23/2017 None
S850769 Mt SAC Habitat Restoration Los Angeles 4 Facility Discharger 10/21/2016 None
S843721 MSAC BCT Los Angeles 4 Facility Discharger 01/07/2016 None
S834419 MSAC Parking Structure Los Angeles 4 Facility Discharger 03/18/2015 None
S831683 MSAC Student Success Los Angeles 4 Facility Discharger 09/23/2014 None
S829871 MSAC Food Services Los Angeles 4 Facility Discharger 06/12/2014 None
S829426 MtSAC Major Grading Temp Parking Los Angeles 4 Facility Discharger 05/15/2014 None
S716308 Mt Sac Agricultural Science Building Los Angeles 4 Facility Discharger 04/21/2008 None
S603095 Sw Portion 1100 Grand Ave Los Angeles 4 Facility Discharger 04/26/1996 None
Total Related Places: 17
  
  
  
  
Expand/Contract Related Parties
Related Parties
Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification
N/A Jeff Holstein Contact Owner Contact N/A N/A N/A
N/A John Gaston Contact Owner Contact N/A N/A N/A
N/A Shannon Carter Contact Owner Contact N/A N/A N/A
N/A Rebecca Mitchell Contact Owner Contact N/A N/A N/A
N/A Gary Nellesen Contact Owner Contact N/A N/A N/A
Total Related Parties: 5
  
  
  
  
Expand/Contract Regulatory Measures
Regulatory Measures (non-enforcement)
Reg. Measure ID Regulatory Measure Type Region WDID Status Program Order No. RM Effective Date RM Termination Date Relationship Relationship Start Date Relationship End Date Amended?
S589721 Construction 4 4 19C409930 Active CONSTW 2009-0009-DWQ 10/07/2025 None Discharger 08/25/2025 None None
Total Regulatory Measures: 1
  
  
  
  
Expand/Contract Violations
Violations within the past five years
Violation ID Occurrence Date Violation Type Violation Description(-) Violation Status Priority Source Facility Name Violated Reg. Meas. ID Violated Reg. Meas. Order No. Linked to Enf.
S895442 09/02/2025 SW - Failure to Obtain Permit Failure to obtain coverage under the 2022 CGP by 09/01/2025. Violation N Internal Report Mt SAC Tech and Health building S561813 2009-0009-DWQ Y
S884523 03/01/2022 SW - Deficient BMP Implementation BMP Violations: ? Sediment track-out observed onto the public road ? Wet and dried concrete debris observed on the ground without adequate BMPs in place Violation N Inspection Mt SAC Pedestrian Bridge S533167 2009-0009-DWQ Y
S884522 03/01/2022 SW - Deficient BMP Implementation BMP Violations: ? The two entrances (corner of W Temple and Bonita Drive and Bonita Drive) were observed inadequately stabilized; sediment track-out was observed leaving the site without proper BMPs in place ? Wet and dried concrete debris were observed on the ground without adequate BMPs in place ? Perimeter controls were observed inadequate in some perimeter areas of the project site ? Equipment oil/gas refueling was observed without appropriate BMPs in place (i.e., secondary containment) ? Trash was observed throughout the site without proper BMPs in place ? Portable toilets were observed without secondary containment on site Violation N Inspection Mt SAC Physical Education Projects S484772 2009-0009-DWQ Y
S884521 03/01/2022 SW - Deficient BMP Implementation BMP Violations: ? Sediment track-out observed onto the road ? Wet and dried concrete debris was observed on the ground without adequate BMPs in place ? Perimeter controls were observed inadequate in some perimeter areas of the project site ? The concrete truck was observed mixing and distributing concrete onsite without proper BMPs in place. ? Portable toilets onsite were observed without containment trays. Violation N Inspection Mt SAC Campus Store S515114 2009-0009-DWQ Y
Report currently showing last five years of violations. Click here to return to viewing one year of violations. Refer to the Interactive Violation Report for more data.
Total Violations: 4
*Click the "(+/-) Violation Description" link to expand and contract the violation description.
  
  
  
  
Expand/Contract Enforcement Actions
Enforcement Actions
Enforcement ID Enforcement Type Enf. Order No. Title Program Effective Date Status
S460291 Notice of Violation None 4 19C402037 CONSTW 09/05/2025 Historical
S449452 Verbal Communication None 4 19C393174 CONSTW 03/01/2022 Historical
S449451 Verbal Communication None 4 19C379762 CONSTW 03/01/2022 Historical
S449450 Verbal Communication None 4 19C389292 CONSTW 03/01/2022 Historical
S438221 Verbal Communication None 4 19C389292 CONSTW 10/20/2020 Historical
S416171 Expedited Payment Letter R4-2014-0096 4 19C351619 CONSTW 08/14/2014 Historical
S414929 Notice of Violation None 4 19C351619 CONSTW 02/25/2014 Historical
S414330 1st Annual Report Notice of Non-Compliance None 4 19C351619 CONSTW 11/01/2013 Historical
S407428 Notice of Violation None 4 19C351619 CONSTW 12/07/2011 Historical
Total Enforcement Actions: 9
  
  
  
  
Expand/Contract Enforcement Actions
Regulatory Measures linked to Related Parties
Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status
Total Regulatory Measures linked to Related Parties: 0
  
  
The current report was generated with data as of: 05/20/2026
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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