Gas Transmission Pipelines
Integrity Solutions provides gas transmission HCA analysis that is compliant with 49CFR192.903, as well as 49CFR192.5 Population Class Definition. We can support both the use of Method 1 and Method 2 (typically reduces HCA mileage) as stated in the regulations.
Method 1: "Class 3 & 4 Location Analysis" uses Census block data and land use/cover data with a DOQQ map and 660 ft centerline buffer in all Class 3 and 4 Locations.
Method 2: "Radial Buildings Analysis" uses a Potential Impact Circle (>=20 buildings) along the centerline to identify pipeline segments that could affect an HCA.
We can also provide required documentation and visuals (maps, schematics) that are necessary to demonstrate compliance.
Hazardous Liquid Pipelines and Facilities
Integrity Solutions utilizes GIS based spatial analyses and a thorough identification process for determining if hazardous liquid pipelines, as well as facility piping and break out tanks (ASTs), "could affect" a High Consequence Area (HCA) as defined by 49 CFR 195.450.
Integrity Solutions' HCA analysis process for pipelines and facilities is managed in three overlapping analyses used to identify potential release impacts. The analysis types are:
Immediate Impact – Identifies release points directly affected within an HCA.
Overland Migration Impact – Identifies if product released from the release points has the potential to migrate as an area sheet flow downhill to an HCA (also available as an air dispersion model).
Watershed Migration Impact – Identifies if product released from the release points, and resulting potential sheet flow area, has the potential to enter any water feature that could transport it miles downstream to an HCA.
