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SOIL SAMPLING <br /> Soil samples for Tank 92 will be taken at 5.0'intervals star ing at a bore hole depth of 10.0', Standard <br /> BX tube samples will be taken from a eight inch hollow tem auger. Push point drilling may also be <br /> used for soil sampling, Each soil tube will be capped with a layer of aluminum foil secured by plastic <br /> caps, sealed with duct tape, labeled for identification, and stored on ice for transport to the <br /> laboratory. All bore holes will be logged during the d 'lling using the standard soil classification <br /> method. Soil samples will be transported under a chain o custody to Sherwood Labs of Hilmar, Ca. <br /> for analysis or analyzed on site. Samples from Tank #2 will be analyzed per EPA Methods 8020 <br /> (BTEX), (MTBE), and 5030f8015(M)TPH-Gasoline. Samples from Tank#1 will anlyzed per EPA <br /> Method 8010& 8020. <br /> MONITORING WELL DEVELOPMENT <br /> After soil sampling is completed, the borehole on Tank#2 ' l be developed into two inch PVC cased <br /> monitoring well. Well depth, length of screened well casing and sand filter, and the location of a <br /> bentonite plug will be determined in the field by the (PHS-EHD) representative and Foothill <br /> Engineering. Permits for the monitoring wells and boreholes will be obtained by the drilling <br /> subcontractor from the (PHS-EH). Monitoring wells will be developed and purged before gauging <br /> and water sampling. . <br /> MONITORING WELL TESTING <br /> The monitoring well will be gauged and water samples btained and analyzed quarterly. A report <br /> summarizing the quarterly results of gauging and testing of each monitoring well will be prepared by <br /> the site.owner's consultant. <br /> i <br /> SUMMARY <br /> The work plan calls for Foothill Engineering to secure t e services of a licenced drilling contractor <br /> to drill slant bore holes sampling on Tank #1, A vertical bore hole with sampling will be made on <br /> Tank #2. The Tank#2 bore hole will be used to install 2" PVC monitoring well. A report of the <br /> findings for both tank locations with soil sample analysis will be prepared by Foothill Engineering <br /> for review by all parties. <br /> Please address any questions, corrections or additions to Ery Rifenburg, Foothill Engineering, Phone <br /> 209/368-9381 !; <br /> Respectfully submitted, <br /> Foo 'll E ng <br /> Ery Ri enb g PE <br /> cc: Norman Higgins <br />