# HILCORP NORTH SLOPE, LLC — Integrity Assurance Notification

- **operation:** document
- **citation:** PHMSA 25-333607
- **title:** HILCORP NORTH SLOPE, LLC — Integrity Assurance Notification
- **source type:** inspection
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** historical
- **official:** true
- **published on:** 2025-02-12
- **effective on:** 2025-02-12
- **summary:** HAZARDOUS LIQUID in AK; TECHNOLOGY; PHMSA status: RESOLVED.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-leading-ian-25-333607-operator-1541.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-leading-ian-25-333607-operator-1541.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-leading-ian-25-333607-operator-1541
- **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/data_statistics/pipeline/SRCR_and_Integrity_Assurance_Notifications.zip
**body:**

Hilcorp North Slope, LLC (OPID #1541) operates the Natural Gas Liquids (NGL) Pipeline (Unit #15395) in Prudhoe Bay, Alaska. The NGL pipeline delivers NGLs from the Central Gas Facility (CGF) to Skid 50 for blending with the Oil Transit Lines (Unit #72436). Hilcorp North Slope is proposing to utilize Guided Wave Ultrasonic Testing (GWT), and Digital/Computer Radiography (DRT/CRT) supplemented with Tangential Radiography (TRT) for the integrity assessment of the NGL Pipeline System as detailed in the attached procedure. The NGL pipeline is under U.S. Department of Transportation (DOT)/Office of Pipeline Safety (OPS) Jurisdiction for transportation of hazardous liquids in accordance with Chapter 49 Code of Federal Regulations (CFR) Part 195. The intent of this document is to be the official submittal for usage of “Other Technology”, as outlined and in accordance with § 195.452(j)(5)(iv), for the NGL pipeline system. This document outlines the integrity assessment proposal, methodology, procedures, assessment threats, mitigation measures, validation of assessments, and reassessment interval criteria associated with the proposed technology.
- **truncated:** false
- **body characters:** 1153