{"operation":"document","citation":"PI-04-0106","title":"Natural Resources Engineering Company — Pipeline Safety Interpretation","source_type":"guidance","agency":"Pipeline and Hazardous Materials Safety Administration","status":"guidance","official":true,"published_on":"2004-04-20","effective_on":null,"summary":"PI-04-0106 response to Natural Resources Engineering Company concerning 192.5.","machine_formats":{"json":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-04-0106.json","markdown":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-04-0106.md"},"app_url":"https://regulus.evalyn.ai/document/phmsa-interpretation-pi-04-0106","source_url":"https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/2004/g04-04-20_Peterson_192.5-lmx.pdf","body":"<<<PAGE 1>>>\n\nPI-04-0106\nU.S. Department of Transportation\nResearch and Special Programs Administration\n400 Seventh Street, S.W.\nWashington, D.C. 20590\nApril 20, 2004\nMr. Joseph Peterson\nGIS Specialist\nNatural Resources Engineering Company\n69 North 28th Street, Suite 27\nSuperior, WI 54880\nDear Mr. Peterson:\nThis is in response to your e-mail of March 29, 2004, in which you request an interpretation of the provisions\nof the Federal gas pipeline safety regulations at 49 CFR 192.5, Class locations, as it relates to the concept of clusters.\nThe original edition of the gas pipeline safety regulations at 49 CFR Part 192 (35 FR 13251; August 19, 1970)\nsought to address the problem that the class location scheme could create a two-mile stretch of higher class location\nsolely to protect a small cluster of buildings at a crossroads or road crossing. To avoid this situation a new paragraph was\nadded to allow adjustment of class location unit boundaries to address isolated clusters of buildings intended for human\noccupancy.\nIn the regulations the term, \"cluster,\" is used in its ordinary dictionary sense, and has not been a significant\nsource of misunderstanding. The dictionary meaning is: a number of similar things together, a bunch, a group.\nThe history of § 192.5 shows that the cluster exception applies only when all buildings in a one-mile class\nlocation unit are in a single cluster. If a class location unit contains buildings outside a cluster or more than one\ncluster of buildings, all buildings in the unit must be counted to determine the class location of the unit.\nIf you have any further questions about the pipeline safety regulations, please contact\nSincerely,\nRichard D. Huriaux, P.E.\nManager, Regulations\nOffice of Pipeline Safety","truncated":false,"body_characters":1756}