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REQUESTED INFORMATION TO SUPPLEMENT THE <br /> SOUTHWEST HIDE COMPANY SITE CHARACTERIZATION REPORT <br /> SUBMITTED APRIL 1989 <br /> Work Plan to Investigate Southwest Hides ' s Current Brine Handling <br /> Facilities <br /> This work will begin by performing a preliminary investigation <br /> to create a schematic diagram of Southwest Hide' s entire brine <br /> handling system, including pipe sizes and type. All closed <br /> systems will be pressure tested to determine if any leaks exist. <br /> If parts of the system can not be pressure tested, soil samples <br /> will be collected to determine if any brine leakage has occurred. <br /> The number and location of these soil samples will not be known <br /> until the system schematic diagram has been developed and the <br /> preliminary investigation performed. The preliminary <br /> investigation work is scheduled to begin May 12, 1989. <br /> Work Plan for Soil Investigation in Leachfield, Washrack and Salt <br /> Storage Area <br /> On the page following, please find a diagram delineating proposed <br /> soil sample locations for the abandoned leach field and washrack <br /> areas. As indicated on the diagram, it is proposed to investigate <br /> the leach field area through the use of a grid laid out on <br /> approximately fifty foot centers. <br /> A soil boring will be drilled at each location and at least <br /> three samples will be collected at approximately five foot <br /> vertical intervals. These samples will be analyzed for chlorides <br /> and electrical conductivity of the saturated paste in an attempt <br /> to show the existence of a vertical contamination gradient within <br /> the soil . <br /> In addition to the washrack and abandoned leach field areas, <br /> MEC will also be examining the soil in the vicinity of the salt <br /> storage facility and describing its overall contribution to <br /> the problem. It is anticipated that this work will be performed <br /> along with the well installation scheduled to begin May 30, <br /> 1989. <br /> Theory of Leaching Purge Water Contributing to Chloride Contamination <br /> of Ground Water at Well #2 <br /> Samples Aa, Bb, E, F and I through 0, collected in November <br /> of 1987, were taken near well #2 located by the southwest corner <br /> of pond #1. The soil samples depict chloride contents that <br /> 1 of 4 <br />