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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
562173 Sentinel Peak Resources California LLC Privately-Owned Business 5640 South Fairfax Avenue Los Angeles, CA 90056 None None
  
  
  
  
Expand/Contract Related Places
Related Places
Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date
897759 Inglewood Oil Field Los Angeles 4 Land Treatment Unit Owner and Operator 11/27/2024 None
791884 Inglewood Oil Field Los Angeles 4 Oil/Gas Extraction Owner and Operator 01/01/2017 None
243304 Montebello Oil Field Los Angeles 4 Land Treatment Unit Owner 01/01/2017 None
232882 Inglewood Oil Field (Baldwin Hills) Land Treatment Units Los Angeles 4 Land Treatment Unit Owner and Operator 01/01/2017 None
Total Related Places: 4
  
  
  
  
Expand/Contract Related Parties
Related Parties
Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification
581241 Joseph Walters Person Legally Responsible Official 11/30/2018 None None
581241 Joseph Walters Person Data Submitter 07/19/2018 11/29/2018 None
568599 John Landgard Person Legally Responsible Official 10/05/2017 02/26/2019 None
562305 Justin Campbell Person Data Submitter 02/01/2017 None None
556948 James Nelson Person Data Submitter 02/01/2017 None None
520196 Patrick Vowell Person Legally Responsible Official 01/01/2017 05/22/2020 None
Total Related Parties: 6
  
  
  
  
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?
148289 WDR 4 4B191396001 Historical LNDISPOTH 01-055 04/26/2001 07/14/2022 Discharger 01/01/2017 None N
389308 WDR 4 4B191396002 Historical LNDISPOTH R4-2013-0023 02/07/2013 10/24/2024 Discharger 01/01/2017 None N
383620 NPDES Permit 4 4B192113018 Historical NPDNONMUNIPRCS R4-2013-0021 03/09/2013 03/31/2018 Discharger 01/01/2017 None N
416564 NPDES Permit 4 4B192113018 Active NPDINDLRG R4-2018-0020 04/01/2018 None Discharger 10/02/2017 None N
459296 Enrollee - WDR 4 None Active LNDISPOTH 90-148 10/24/2024 None Discharger 10/24/2024 None N
Total Regulatory Measures: 5
  
  
  
  
Expand/Contract Violations
Violations within the past year
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.
1143311 03/12/2025 CAT2 Hydrocarbons, Petroleum Daily Maximum limit is 100 ug/L and reported value was 4 Violation N eSMR Inglewood Oil Field 416564 R4-2018-0020 Y
1143310 03/12/2025 CAT2 Hydrocarbons, Petroleum Daily Maximum limit is 100 ug/L and reported value was 1 Violation N eSMR Inglewood Oil Field 416564 R4-2018-0020 Y
1151263 11/17/2025 CAT2 Zinc, Total Recoverable Daily Maximum limit is 0.53 lb/day and reported value wa Violation N eSMR Inglewood Oil Field 416564 R4-2018-0020 N
1150457 12/31/2025 Deficient Reporting Asbestos, Methyl Chloride, Tetrachloroethylene, 2-Methyl-4,6-Dinitrophenol, 1,2, Violation None Report Inglewood Oil Field 416564 R4-2018-0020 N
1151257 03/12/2025 OEV TPH C13-C22 Daily Maximum limit is 100 ug/L and reported value was 420 ug/L at E Violation N eSMR Inglewood Oil Field 416564 R4-2018-0020 N
1151260 11/17/2025 CAT2 Zinc, Total Recoverable Daily Maximum limit is 105 ug/L and reported value was 4 Violation N eSMR Inglewood Oil Field 416564 R4-2018-0020 N
1151258 03/12/2025 OEV TPH C13-C22 Daily Maximum limit is 100 ug/L and reported value was 169 ug/L at E Violation N eSMR Inglewood Oil Field 416564 R4-2018-0020 N
1151259 11/17/2025 OEV TPH as Motor Oil Daily Maximum limit is 100 ug/L and reported value was 415 ug/L Violation N eSMR Inglewood Oil Field 416564 R4-2018-0020 N
1151261 11/17/2025 OEV TPH as Motor Oil Daily Maximum limit is 100 ug/L and reported value was 199 ug/L Violation N eSMR Inglewood Oil Field 416564 R4-2018-0020 N
1150459 12/31/2025 Deficient Reporting Asbestos, Methyl Chloride, Tetrachloroethylene, 2-Methyl-4,6-Dinitrophenol, 1,2, Violation None Report Inglewood Oil Field 416564 R4-2018-0020 N
1151262 11/17/2025 CAT2 Zinc, Total Recoverable Daily Maximum limit is 105 ug/L and reported value was 5 Violation N eSMR Inglewood Oil Field 416564 R4-2018-0020 N
1150460 12/31/2025 Deficient Reporting Asbestos, Methyl Chloride and 1,2,4-Trichlorobenzene not reported for Eff-001 on Violation None Report Inglewood Oil Field 416564 R4-2018-0020 N
Report defaults to display violations within the last year. Click here to see last five years of violations. Refer to the Interactive Violation Report for more data.
Total Violations: 12
*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
389233 Time Schedule Order R4-2013-0022 TSO R4-2013-0022 for Sentinel Peak Resources California LLC NPDNONMUNIPRCS 03/09/2013 Historical
435255 Admin Civil Liability R4-2019-0120 ACL R4-2019-0120 for Sentinel Peak Resources California LLC NPDNONMUNIPRCS 03/03/2020 Historical
456701 Admin Civil Liability R4-2024-0179 ACL R4-2024-0179 for Sentinel Peak Resources California LLC NPDINDLRG 07/31/2024 Historical
419563 Time Schedule Order R4-2018-0021 TSO R4-2018-0021 for Sentinel Peak Resources California LLC NPDINDLRG 04/01/2018 Active
443924 Admin Civil Liability R4-2021-0100 ACL R4-2021-0100 for Sentinel Peak Resources California LLC NPDINDLRG 10/19/2021 Historical
461336 Expedited Payment Letter R4-2025-0150 EPL R4-2025-0150 for Sentinel Peak Resources California LLC NPDINDLRG 05/01/2025 Active
Total Enforcement Actions: 6
  
  
  
  
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: 02/16/2026
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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