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• k' ■ KLEINFELDER 3.2.3 Former AST Area An anhydrous ammonia tank and various other fertilizer above ground tanks were formerly stored near the northern central portion of the site. Kleinfelder proposes to advance hand auger soil boring in each of the AST impoundments to a total depth of 3 feet bgs. A total of 6 soil samples (3 from each boring) would be collected for possible laboratory analysis. Soil,samples would be collected from the surface, 1 foot, and 3 foot depths. At this time we propose to analyze the 1 foot soil sample from the anhydrous ammonia AST impoundment, and the 1 foot soil sample from the additional AST impoundment. The remaining soil samples would be put on hold at the laboratory pending further analysis requirements if applicable. 3.2.4 Former Tank Washout Area A concrete tank washout pad and sump exists on the site. Kleinfelder proposes to advance one shallow soil boring near the center of the pad. The pad would initially be cored with a concrete coring tool and then the soil boring would be advanced with a hand auger. Kleinfelder proposes to collect three soil samples from within the tank washout area for possible laboratory analysis. The soil samples would be collected at the surface, 1 foot, and 3 feet bgs. At this time we propose to analyze the 1 foot soil sample from the washout area. The remaining soil samples would be put on hold at the laboratory pending further analysis requirements if applicable. 3.2.5 Leach Field We propose to collect a total of three soil samples from within the residential leach field from one locations for possible laboratory analysis. The soil samples would be collected at the surface, 1 foot, and 3 feet bgs. At this time we propose to analyze the 3 foot soil sample. The remaining soil samples would be put on hold at the laboratory pending further analysis requirements if applicable. 3.3 DOMESTIC WATER WELL SAMPLING Kleinfelder will collect a water sample from the domestic water well on site. The water sample will be collected by drawing a sample from the closest discharge point to the well itself. The discharge point will be decontaminated with a Liquinox laboratory-grade detergent solution prior to collection. Sufficient water will be allowed to be purged from the discharge point prior to collection. Because the well is an active domestic water supply, the water purged from the well will not be contained and allowed to flow to the ground surface. 3.4 GEOPHYSICAL INVESTIGATION Kleinfelder will investigate the possibility of an existing underground storage tank on the site by implementing a magnetic geophysical survey of the suspect area. Based upon the results of the survey and the confirmation of presence or absence of the UST, follow up discussions of further additional work will be addressed. 27125.E01 /ST03R657 Page 8 of 15 Copyright 2003,Kleinfelder,Inc. May 23,2003