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Table 6-1. Sampling and Analytical Matrix for the Former <br /> Two 20,000-Gallon USTs Location, Stockton AASF <br /> Location and Areas of Potential Fortner Two 10,000-Gallon USTs Location <br /> Environmental Concern: <br /> Potential Contaminant of Concern: TPH diesel and gasoline),MTBE,BTEX,oxygenates,and lead. <br /> Sampling Locations: All Boring Locations' <br /> Sample Depth: Analytical Methods <br /> Collect soil samples every 5 feet from SW8015G and D,SW8260, and SW6010 <br /> 5 to 40 ft bgs <br /> Groundwater SW8015G and D,SW8260,and SW6010 <br /> ' Boring locations on Figure 6-1 may be moved pending field observations,accessibility,and lithology. <br /> b Groundwater samples will only be collected at first groundwater encountered during the field drilling effort. <br /> AASF = Army Aviation and Support Facility <br /> BTEX = benzene,toluene,ethylbenzene,and xylenes <br /> EPA = United States Environmental Protection Agency <br /> ft bgs = feet below ground surface <br /> MTBE = methyl tertiary butyl ether <br /> MW = monitoring well <br /> TPH = total petroleum hydrocarbons <br /> UST = underground storage tank <br /> Note: Groundwater level is approximately 40 to 45 feet bgs. <br /> Only two of the collected soil samples from each boring location will be submitted for analysis based on field observations <br /> and PID readings;all remaining collected soil samples will be submitted and placed on hold. <br />