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 null null Related Places Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date 791884 Inglewood Oil Field Los Angeles 4 Oil/Gas Extraction Owner and Operator 01/01/2017 null 243304 Montebello Oil Field Los Angeles 4 Land Treatment Unit Owner 01/01/2017 null 232882 Inglewood Oil Field (Baldwin Hills) Land Treatment Units Los Angeles 4 Land Treatment Unit Owner and Operator 01/01/2017 null 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 null null 581241 Joseph Walters Person Data Submitter 07/19/2018 11/29/2018 null 568599 John Landgard Person Legally Responsible Official 10/05/2017 02/26/2019 null 562305 Justin Campbell Person Data Submitter 02/01/2017 null null 556948 James Nelson Person Data Submitter 02/01/2017 null null 520196 Patrick Vowell Person Legally Responsible Official 01/01/2017 05/22/2020 null Regulatory Measures(non-enforcement) Reg. Measure ID Regulatory Measure Type Region WDID Title Status Program Order No. RM Effective Date RM Termination Date Relationship Relationship Start Date Relationship End Date 416564 NPDES Permit 4 4B192113018 NPDES R4-2018-0020 for Sentinel Peak Resources California LLC Active NPDINDLRG R4-2018-0020 04/01/2018 null Discharger 10/02/2017 null 389308 WDR 4 4B191396002 WDR R4-2013-0023 for Sentinel Peak Resources California LLC Active LNDISPOTH R4-2013-0023 02/07/2013 null Discharger 01/01/2017 null 383620 NPDES Permit 4 4B192113018 NPDES Permit R4-2013-0021 for Sentinel Peak Resources California LLC Historical NPDNONMUNIPRCS R4-2013-0021 03/09/2013 03/31/2018 Discharger 01/01/2017 null 148289 WDR 4 4B191396001 WDR 01-055 for Sentinel Peak Resources California LLC Historical LNDISPOTH 01-055 04/26/2001 07/14/2022 Discharger 01/01/2017 null Violations within the past calendar 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. 1127569 03/06/2024 OEV TPH as Motor Oil 1-Hour Average (Mean) limit is 100 ug/L and reported value was 108 ug/L at EFF-006. Violation N eSMR Inglewood Oil Field 416564 R4-2018-0020 N 1127568 03/06/2024 OEV TPH as Motor Oil Daily Maximum limit is 100 ug/L and reported value was 164 ug/L at EFF-002. Violation N eSMR Inglewood Oil Field 416564 R4-2018-0020 N 1127567 02/19/2024 OEV Turbidity Daily Maximum limit is 75 NTU and reported value was 129 NTU at EFF-006. Violation N eSMR Inglewood Oil Field 416564 R4-2018-0020 N 1127566 02/19/2024 CAT1 Total Suspended Solids (TSS) Daily Maximum limit is 75 mg/L and reported value was 90 mg/L at EFF-006. Violation N eSMR Inglewood Oil Field 416564 R4-2018-0020 N 1127565 01/02/2024 OEV TPH as Motor Oil 1-Hour Average (Mean) limit is 100 ug/L and reported value was 679 ug/L at EFF-002. Violation N eSMR Inglewood Oil Field 416564 R4-2018-0020 N 1126008 12/21/2023 Deficient Reporting E. Coli not analyzed once per discharge for Eff-001, EFF-002, and EFF-006 on 12/21/2023 Violation null Report Inglewood Oil Field 416564 R4-2018-0020 N 1126007 12/21/2023 Deficient Reporting Flow was reported as a daily discharge for Eff-001, EFF-002, and EFF-006 on 12/21/2023. Violation null Report Inglewood Oil Field 416564 R4-2018-0020 N 1126006 12/31/2023 Deficient Reporting pH and temperature not analyzed within a 15 min. holding time for Eff-001, EFF-002, and EFF-006. Violation null Report Inglewood Oil Field 416564 R4-2018-0020 N Enforcement Actions Enforcement ID Enforcement Type Enf. Order No. Title Program Effective Date Status 456701 Expedited Payment Letter R4-2024-0179 EPL R4-2024-0179 for Sentinel Peak Resources California LLC NPDINDLRG 04/24/2024 Active 443924 Admin Civil Liability R4-2021-0100 ACL R4-2021-0100 for Sentinel Peak Resources California LLC NPDINDLRG 10/19/2021 Historical 435255 Admin Civil Liability R4-2019-0120 ACL R4-2019-0120 for Sentinel Peak Resources California LLC NPDNONMUNIPRCS 03/03/2020 Historical 419563 Time Schedule Order R4-2018-0021 TSO R4-2018-0021 for Sentinel Peak Resources California LLC NPDINDLRG 04/01/2018 Active 389233 Time Schedule Order R4-2013-0022 TSO R4-2013-0022 for Sentinel Peak Resources California LLC NPDNONMUNIPRCS 03/09/2013 Historical Regulatory Measures linked to Related Parties Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status