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ADDENDUM TO SOIL VAPOR PROBE PLAN <br /> Procedures for Sites with Shallow Groundwater <br /> This document is to be attached to a letter from Robert Hinchee, <br /> EA Engineering, to Richard Reed dated September 16, 1987. The <br /> Information within the letter fulfills the required elements of a <br /> Soil Vapor Probe Plan. The purpose of this addendum is to detail <br /> Sail Vapor Probe procedures in cages of sites with shallow <br /> groundwater. <br /> Groundwater depth is routinely established at all sites where <br /> Soil Vapor Contaminant Assessment (SVGA) work is to be done. At <br /> sites where groundwater is shallow (from S to 10 foot depth) , <br /> SVCA crews will establish groundwater depth using nearby existing <br /> groundwater monitoring wells, the same day as the SVCA. Crews <br /> will not allow the probes to penetrate deeper than the currently <br /> established groundwater depth. <br /> I <br /> 10/20/a7 <br />