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• EHD representative stopped the work , and reque, cec aoo,tional samplling. 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- ❑Lately below it at 7 ' . Refer to Plate VII for details Laboratory results of those samples , (Table II & Exhibit E, ) revealed that STEX, EDB, TPH-G, and total leao were all below detection limits in the sample taken at 7 , (S1 . ) A small amount Of Xvlene was present in the soil sample taken at 4 , kS2; ) al _ other camponents tested were below detection levels rhe remo,,ed spoil was returned to the hole. After reviewing the results of thy. above tvorv , the Courcy Em, stated that site closure coolo not occur an,o t;^atacdition-I isorr woula be required; refer to Exhibit E for ooccom_=ntation . WORKPLAN FOR SOIL INVESTIGATION: Pecause of the very minor amount of cor.taminai. iu,-, encountered , the shallow depth and the limitea area it occupies , it is 4elt that the best method for removing the contaminateo soil is b„ . additional excavation and sampling; the iolio"ing L,.orl�Yian is proposed for- that purpose. 1 . Using JTO equipment , e<cavate to the north an❑ east of the e,lsting site from the area where the clay layer was found. The RG 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 removed. It is anticipated that the maximurn size of this work will be appro ,- irnately 20 ' X 15 X 10 deep; refer to Plate VIII for the anticipated configuration of the e,cavation, plater was nor- encountered during tank removal operations at a deptn ❑r 14D feet. , but may be higher at the time this work is performed. in the evert water is encountered , one or more "arab " samples will bF- taKen for analvsis Soil samples will be taken from the bottom and sides of the excavation approximately as shown of Plate VIII , the actual sample locations will depend on conditions encountered during the work , upon agreement with the County EHD representative. Soil samples will be taken from the teeth of the backhoe bucll�et by Pushing a clean metal tube into the spoil ; it will be promptl ., sealed , labeled and preserved on ice penoing transport to a Certified lab for analysis. Depending on conditions at the site , • soil samples may be taken by pushing the metal tube directly into the in-place soil by the geologist. 4