Continual Monitoring of Transmission and Distribution Assets
Every service below maps to a requirement your compliance team already tracks. S&A executes the field work, the analysis, and the documentation. So your leakage survey records under 49 CFR §§192.706 and 192.723, and your patrol records under §§192.705 and 192.721, are complete, consistent, and audit-ready.
Turnkey AMLD Execution
Advanced Mobile Leak Detection is the centerpiece of PHMSA’s Advanced Leak Detection. Program (ALDP) expectations under the Gas Pipeline Leak Detection and Repair rule. S&A delivers AMLD as a complete program, not just a truck with a sensor:
- AMLD mobile survey services — Vehicle-mounted, high-sensitivity methane detection surveys of distribution and transmission assets. Executed to your route plans and survey intervals.
- AMLD survey analysis and reporting — Data processing, prioritization, and deliverables formatted for your compliance records and GIS systems.
- LISA / Indication leak survey validation — Field investigation and validation of Leak Indication Search Areas, closing the loop between AMLD indications and graded, documented leaks.
Leak Pin-Pointing
- Traditional leak surveys — Instrumented mobile and walking leakage surveys meeting the intervals of §192.723 for distribution systems. Business districts at least annually, not exceeding 15 months; outside business districts on the code-required cycle for your pipe types and §192.706 for transmission lines.
- Leak re-evaluations — Scheduled rechecks of open leaks. Support the leak grading and reevaluation timelines now codified in PHMSA’s leak rule.
- QA/QC — Independent quality surveys behind in-house or contract crews to verify survey effectiveness and document it.
Core Survey Methods
- Mobile survey — Efficient, instrumented coverage of large distribution footprints.
- Walking survey — Foot-by-foot instrumented survey of mains and services, including business districts, congested areas, and locations inaccessible by vehicle.
Emergency & Specialty Response
- Emergency odor response — Rapid investigation of odor calls and gas complaints in support of your emergency plan procedures under §192.615.
Inspection & Compliance Services
- Atmospheric corrosion inspections — Inspection of exposed piping for atmospheric corrosion at the intervals required by §192.481 (onshore: each 3 calendar years, not exceeding 39 months).
- Inside meter inspections — Inspection of inside meter sets and associated piping, including atmospheric corrosion evaluation of pipe inside buildings.
- Valve inspection and maintenance — Inspection, servicing, and documentation of distribution key valves per §192.747 and transmission valves per §192.745 (each calendar year, not exceeding 15 months).
Specialty Surveys & Patrols
- Substructure / subsurface surveys — Bar-hole and subsurface investigation to track gas migration and define leak extent.
- Prepaving and blasting surveys — Pre-construction leak surveys before paving or blasting activity near gas facilities, protecting your system and documenting due diligence.
- Uprate support surveys — Leak surveys before and during pressure increases in support of uprating programs under 49 CFR Part 192, Subpart K.
- Bridge and railroad casing inspections — Inspection of cased crossings and exposed spans.
- Exposed crossing patrols — Patrols of exposed pipeline at bridges, waterways, and other crossings in support of §§192.705 and 192.721 patrolling requirements.
- Winter frost patrols — Seasonal patrols where frost heave and ground movement threaten pipe integrity.
Qualified People, Documented Work
Leak survey, investigation, and grading personnel must be qualified under 49 CFR Part 192, Subpart N (Operator Qualification).