Lovaca Gathering Company — Pipeline Safety Interpretation

Page 1PI-75-0108 July, 24, 1975 Mr. Jay C. Eichhorn Lovaca Gathering Company Five Greenway Plaza East Houston, Texas 77046 Dear Mr. Eichhorn: In your letter of June 26, 1975, you ask: "With consideration given to the word 'prevalent' as used in CFR 192.5(e), what affect would the construction of one four or more story building have on a Class 1 area?" In accordance with 49 CFR 192.5, the construction of a four or more story building in a Class 1 area could change the area to a: (1) Class 2 location, if after construction the area has more than 10 buildings; (2) Class 3 location, if the building will be occupied by 20 or more persons during normal use and be within 100 yards of the pipeline; or (3) Class 4 location, if after construction, buildings with four or more stories are "prevalent" in the area. The term "prevalent" in Section 192.5(e) regarding Class locations is used in its ordinary dictionary sense. Sincerely, Cesar DeLeon Acting Director Office of Pipeline Safety Operations Materials Transportation Bureau#

Page 2June 26, 1975 Lovaca Gathering Company Five Greenway Plaza East Houston, Texas 77046 Office of Pipeline Safety 400 7th Street Southwest Washington, D.C. 20590 ATTENTION: Mr. Furrow, Chief of Regulations Division Dear Mr. Furrow: While reviewing the Minimum Federal Safety Standards for Gas Lines, I became unsure of the proper interpretation of "Class 4" area. My question is as follows: With consideration given to the word "prevalent" as used in CFR 192.5 (e), what affect would the construction of one four or more story building have an a Class 1 area? Any assistance in resolving this question will be greatly appreciated. Yours truly, Jay c. Eichhorn#