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fr <br /> ENVIRONMENTAL TECHNOLOGIES CORPORATION v tis r h , <br /> January 17, 1996 <br /> 94334 <br /> Ms Mary Meays <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> PO Box 388 <br /> Stockton, CA 95201-0388 <br /> Subject Addendum to Workplan, KOK Realty Corp , 2403 Navy Drive, Stockton, <br /> California <br /> Ms Meays <br /> Per our telephone conversations, Smith Environmental Technology Corp has prepared this letter <br /> to serve as an addendum to Smith Environmental's Workplan for Additional Subsurface <br /> • Investigation dated February 17, 1995 for the above referenced site During our conversation of <br /> August 11, 1995, you requested several items be submitted by Smith Environmental as an <br /> addendum to the workplan These items listed below are additions to your comments of March <br /> 1995 regarding the workplan The additions are addressed below <br /> 1 Discuss remediation alternatives for soil contamination Smith Environmental will <br /> evaluate remediation alternatives such as excavation or vapor extraction after <br /> defining the lateral extent of near source contaminated soils from the analysis of <br /> the samples collected from the 4 borings <br /> 2 Collect and analyze soil samples from below the groundwater table in order to <br /> determine the vertical extent of contamination observed below groundwater during <br /> the drilling of borings MW 1, MW2, and MW3 It is our position that the <br /> requirement to collect and analyze soil samples below the water table is technically <br /> and scientifically unjustified Due to the dissolved portion of petroleum <br /> hydrocarbons in groundwater, analytical results of these soil samples would be <br /> unrepresentative and impossible to relate to any known appropriate relative <br /> requirements for either soil or groundwater Furthermore, benzene, toluene, <br /> ethylbenzene, and xylene compounds, due to their relatively high solubility in <br /> water, are not strongly absorbed to soil particles <br /> • <br /> 150091 uq-rFm\i,010496 doe <br /> 1260 Graphics Drive Modesto,CA 95351-1502 (209)579-2221 Fax(209)579-2225 <br /> Engineering Consulting • Remediation Construction <br />