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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
232882 Inglewood Oil Field (Baldwin Hills) Land Treatment Units Los Angeles 4 Land Treatment Unit Owner and Operator 01/01/2017 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
897759 Inglewood Oil Field Los Angeles 4 Land Treatment Unit Owner and Operator 11/27/2024 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
556948 James Nelson Person Data Submitter 02/01/2017 None None
562305 Justin Campbell 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?
459296 Enrollee - WDR 4 None Active LNDISPOTH 90-148 10/24/2024 None Discharger 10/24/2024 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
389308 WDR 4 4B191396002 Historical LNDISPOTH R4-2013-0023 02/07/2013 10/24/2024 Discharger 01/01/2017 None N
148289 WDR 4 4B191396001 Historical LNDISPOTH 01-055 04/26/2001 07/14/2022 Discharger 01/01/2017 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 OEV TPH C13-C22 Daily Maximum limit is 100 g/day and reported value was 468 g/day at Violation N eSMR Inglewood Oil Field 416564 R4-2018-0020 N
1143310 03/12/2025 OEV TPH C13-C22 Daily Maximum limit is 100 g/day and reported value was 267 g/day at Violation N eSMR 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: 2
*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
419563 Time Schedule Order R4-2018-0021 TSO R4-2018-0021 for Sentinel Peak Resources California LLC NPDINDLRG 04/01/2018 Active
435255 Admin Civil Liability R4-2019-0120 ACL R4-2019-0120 for Sentinel Peak Resources California LLC NPDNONMUNIPRCS 03/03/2020 Historical
443924 Admin Civil Liability R4-2021-0100 ACL R4-2021-0100 for Sentinel Peak Resources California LLC NPDINDLRG 10/19/2021 Historical
456701 Admin Civil Liability R4-2024-0179 ACL R4-2024-0179 for Sentinel Peak Resources California LLC NPDINDLRG 07/31/2024 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: 10/17/2025
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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