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AOC Work Plans issued for this UST;however, according to the PHS-EHD,there are no out,,tanding issues related to any of the USTs(with the exception of USTs Number 0002 and 0005). UST 18820012 UST 18820012 was a sump uncertain size and construction exempt from S Late UST regulations located north of the 44xl20 Storage Building(Plate 4.1.2). The sump was a collection point for surface and washdown water m this area and hydrocarbons were identified as a potential concern. Total hydrocarbons were not detected above reporting limits in one sedim t sample collected from the bottom of the sump. In December 2001,AGE installed a boring(PB-10)in the vicinity of the x120 Storage Building sump and collected a grab groundwater sample from the boring. The sam le was analyzed for TPHg,TPHd,TPHmo, and formaldehyde. With the exception of formaldehyde, detected at a concentration of 110 µg/L,none of the requested compounds were detecte 1. As discussed above,no formal closure letter has been issued for this UST;however,according to the PHS-EHD,there are no outstanding issues related to any of the USTs ith the exception of USTs Number 0002 and 0005). UST 18820013 This tank was a 600-gallon AST used for the storage of kerosene that is e empt from UST regulations. The AST was formerly located northwest of the maintenance building(Plate 4.1.2). The exact removal date of the AST or whether soil sampling was performed is unknown. The September 1983 site map shows the AST on the north margin of a concre pad utilized for a gas pump(AGE, 2001). As discussed above,no formal closure letter has beer issued for this UST; however,according to the PHS-EHD,there are no outstanding issues rela d to any of the USTs (with the exception of USTs Number 0002 and 0005). Draft KB61125 workplan-ESC MACTEC Engineering and Consulting, Inc. 22 September 2S,2005