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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 <br />Environmental Concern: <br />Fortner Two 10,000 -Gallon USTs Location <br />Potential Contaminant of Concern: <br />TPH diesel and gasoline), MTBE, BTEX, oxygenates, and lead. <br />Sampling Locations: <br />All Boring Locations' <br />Sample Depth: <br />Analytical Methods <br />Collect soil samples every 5 feet from <br />5 to 40 ft bgs <br />Groundwater <br />SW8015G and D, SW8260, and SW6010 <br />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 = <br />Army Aviation and Support Facility <br />BTEX = <br />benzene, toluene, ethylbenzene, and xylenes <br />EPA = <br />United States Environmental Protection Agency <br />ft bgs = <br />feet below ground surface <br />MTBE = <br />methyl tertiary butyl ether <br />MW = <br />monitoring well <br />TPH = <br />total petroleum hydrocarbons <br />UST = <br />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 />