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I EHD representative stopped the word; , ,and r eyuestec acoitannal sampliang. Two (2) soil samples were taken from the northeast wall at depths of 4 and 7 by Geo-Analytical Laboratory ; the upper sample was taken from the gray clay, the lower one imme- diately below it at 7 . Refer to Plate VII for details Laboratory results of those samples, (Table II & Exhibit E, ) I revealed that bTEX, EDH, TPH--G, and total lead were all below detection limits in the sample taken at 7 , (S1 . ) A small amount of Xylene was present in the soil sample taken at 4 , kS2; ) all other components tested were below detection levels. The removed spoil was returned to the hole. After reviewing the results of the above work , the Cour -c y EHE sLateo that site closure could not occur and tFat additional 4aor� woula -be required; refer to Exhibit f for uocumen-c�,ataDn . i WORKPLAN FOR SOIL INVESTIGATION: Recause of the very minor amount of contamination encountered , the shallow depth and the l a mi teci area it occupies , 1-c is felt that the best method for removing the contaminated soil is by additional excavation and sampling; the following workplan is proposed for that purpose. 1 . Using dTO equipment, excavate to the north and east of the e.,astxng site from the area where the clay layer was mound. The RO on location, {WJH, ) will direct the work. 2. Excavation will continue in the direction of the clay layer until all evidence of contamination has been removes. It 1.s anticipated that the maximum size of this work will be approA- irnately :0 X 15 ' X 10 ' deep; refer to Plate VIII for the anticipated configuration of the excavation_ Water was not encountered during tank removal operations at a deptn of 10 feet , but may be higher at the time this work as performed. In the event waT-er is encountered, one or more "grab" samples will bF- ta+,en for analysis. 3oa1 samples will be taken from the bottom and sides of the evcavataon approximately as shown of Plate VIII ; the actual sample locations will depend on conaitaons encounzered during the work , upon agreement with the County EHD representative. Soil samples will be taken from the teeth of the backhoe buct,et by pushing a clean metal tube into the spoil ; it will be promptly sealed , labeled and preserved on ace pending transport to a Certified lab for analysis. Depending on conditions at the sire , soil samples may be taken by pushing the metal tube directly into the in---place soil by the geologist. 4