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Frank's Exxon 4 4 - 3 - 26 May 1998 <br /> San Joaquin County <br /> trailer park well. However, the contamination may become diluted so the concentrations remain below <br /> the MCLS, Taste and Odor Threshold, and California State Action Levels. We have no documentation <br /> to determine which scenario will occur. <br /> Requirements for"No Further Action Required" letter: <br /> • Perforin a mass balance calculation to determine the amount of substance remaining on-site. <br /> • Perform a risk assessment and fate and transport model to predict the concentration of <br /> contaminants at 200 to 360 ft bgs for the'on-site domestic well. ' <br /> • Obtain the planned location, depth of screen intervals, total depth, length of grout casing for <br /> the proposed new trailer park well., Perform a risk assessment and fate and transport model J <br /> to predict the concentration of contaminants for this proposed domestic well. <br /> —,1Vn 'WIQ&—*AF.fL-}'iiiY.Iiit' 4r� <br /> •z- Based on ff6 above infoiiriationp s nt'a'rationale wliy conditions remaining.atthis`site will <br /> not adversely impact water quality, health, or other beneficial uses. <br /> 1 <br /> I <br /> I <br /> I <br />