# Coatings.

**Citation:** WAC 480-75-410  
**Type / status:** regulation / current  
**Agency:** Washington Utilities and Transportation Commission  
**Effective:** 2008-06-30  
**Published:** Not stated

Before backfilling, each pipeline company must electrically inspect all new coated pipe used to transport hazardous liquids, using a holiday detector to check for faults not observable by visual examination. The pipeline company shall operate the holiday detector in accordance with the manufacturer'

## Document text

Before backfilling, each pipeline company must electrically inspect all new coated pipe used to transport hazardous liquids, using a holiday detector to check for faults not observable by visual examination. The pipeline company shall operate the holiday detector in accordance with the manufacturer's instructions and at the voltage level appropriate for the electrical characteristics of the pipeline being tested.

## Provenance

- Official: Yes
- Source: <https://app.leg.wa.gov/WAC/default.aspx?cite=480-75-410>
- Source ID: `wa-wac`
- SHA-256: `d3c26de4c6445fb78305d711ecf9d4d2105b2339f73cc8a394eadda1526ffea2`
- Retrieved: 2026-08-11T02:02:35.370Z
- Exported: 2026-08-24T05:22:08.483Z
- Document slug: `wac-480-75-410`

### Source metadata

```json
{
  "jurisdiction": "US-WA",
  "chapter": "480-75",
  "section": "480-75-410",
  "sourceNote": "[Statutory Authority: RCW 80.01.040, 80.04.060, 81.88.040. WSR 08-12-045 (Docket PL-070974, General Order R-548), § 480-75-410, filed 5/30/08, effective 6/30/08. Statutory Authority: RCW 80.01.040 and 80.04.160. WSR 02-18-032 (Docket No. TO-000712, General Order No. R-500), § 480-75-410, filed 8/26/02, effective 9/26/02.]",
  "officialPdfUrl": "https://app.leg.wa.gov/WAC/default.aspx?cite=480-75-410&pdf=true",
  "filingHistoryUrl": "https://app.leg.wa.gov/wac/registerfiling.aspx?cite=480-75-410",
  "pipelineScope": "hazardous-liquid",
  "region": "WA"
}
```