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1 <br /> 1 <br /> WORKPLAN FOR PLACING SOIL BORINGS FOR DELINEATION OF HORIZONTAL <br />' AND VERTICAL EXTENT OF CONTAMINATION. <br /> As a result of the laboratory analyzes, it was apparent that <br />' further investigative work was warranted. After extensive <br /> discussions with the owners of the property, and due to space <br /> constraints, it was decided that soil borings would be the best <br />' method of determining the extent of the contamination without <br /> disrupting operations at the facility. Future work will depend <br /> upon the results obtained from the boring%. <br />' NOTE. The small amount of clean soil presently stored on the site <br /> will be returned to the north end of the excavation. The contam- <br /> inated spoil has been recharacterized as required by Forward , <br />' Inc. , and has been accepted for disposal . It will be transported <br /> to that facility prior to initiation of the following workplan. <br /> All laboratory test results and proper- documentation will be <br /> included in the PAR which will be prepared after this stage of <br />' investigative work is completed. <br /> WORKPLAN: <br /> 1 . Osterberg & Stewart auger rig will be utilized for this work. <br /> It will be equipped with sufficient hollow-stem auger flights to <br />' complete each boring without steam cleaning. The application for- - - --the drilling permit, together with a check in the amount of <br /> $89. 04, is attached to this report. <br />' 2. Soil sampling equipment will consist of either a California <br /> Modified split spoon sampler or wireline operated continuous <br /> sampling equipment; both methods are designed to hold the <br /> I standard metal tubes for obtaining discreet soil samples for <br /> analysis. <br /> 3. Five (5) auger--holes will be placed approximately as shown on <br /> Plate VIII; they will be advanced to a maximum depth of 45 feet <br /> bgl , (highest water level , ) or until all evidence of contamina- <br /> tion is gone. <br /> 4. Soil samples will be taken at five (5) foot intervals f rom <br /> 14 ' to the deepest depth penetrated; sampling frequency may vary <br /> depending upon field observations and type of sampling equipment. <br /> 5. Samples will be described , sealed, labeled and logged by the <br /> RG, and transported under chain of custody to FGL laboratory for <br /> analysis. <br /> 6 <br /> i <br />