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99 108017 ground expansion loops and valves located on Tract 36. From this point it extends east to Loadline 1 and west to Loadline 2, 3,4 and 5 where the pipe is connected into each Boilerhouse. It extends southerly from Loadline 1 into the Shop Area connecting to the Boilerhouse and runs south into the Nitrate Area where it connects to the furnace at the corner of the building which heats the office and shop area of a current lessee. The land in which the gas line runs under is grassy azeas or farmed in row crops. A map of the gas line location is in Fi ug re 3• The natural gas distribution was installed in 1968 and was operated and maintained by the Army or it's contractor. The gas line from the valve at Loadline 1 Loadline 2 west has been shut off since 1995. No maintenance has been performed on the entire system from over 10 years. . 2.1 PIPE DESCRIPTION (a) Steel pipe,weight A, Class 1, 8", 21,675 LF (b) Steel pipe,weight A, Class 1, 6", 5,853 LF � Steel pipe, weight A, Class 1,4", 5,373 LF (d) Steel pipe,weight A, Class 1, 3", 2,621 LF (e) The depth of the gas line varies from 3' to 10' 3.0 SURVEY RESULTS AND POTENTIAL CONCERNS (a) KN Energy,the only gas utility to serve the installation conducted an inspection for leakage on 24 April 1995. The method of survey was a flame ionization leak survey, a method which is sensitive to the presence of flammable gas in the range of parts per million. The results of the survey indicated no leaks were found on the underground facilities surveyed. One above ground leak was detected near Building N-17 where a tenant uses the natural gas for business purposes. This leak was repaired by KN Energy 25 April 1995. (b) Surface Soil Samplin� (1) Draina�e Ditches& Surfaces Depressions - Samples LLO1-18(Loadline 1) collected from a boiler blow-down pit, located northwest of Building 1L-27 was analyzed for explosives and 2