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- wy ��• ��� � hN ����•, � �'f«,r�y� -,t 'v�,�±}� Fk�,�e "n S� � n� �. '`�, r:, h."�` - <br /> 'n <br /> 1 <br /> RP N <br /> i <br /> IL E E RELATED TO <br /> --� REMOVAL OF UNDERGROUNII�ANKSDJ � <br /> SHELL SERVICE STATION NOV 22 <br /> [ 628 WEST CHARTER WAY ENV'-J rv44 JTgL <br /> [f STOCKTON,CALIFORNIA M1r�SE'? rjC..tTH <br /> f <br /> DELTA PROJECT NO. 40-88-586 <br /> 1,0 INTRODUCTION <br /> Delta Environmental Consultants has been authorized to conduct an assessment to evaluate the <br /> distribution of petroleum constituents(if present)in soils beneath a Shell Service Station at 620 West <br /> Charter Way in Stockton, California. The assessment is being conducted prior to excavation and <br /> removal of existing underground storage tanks and installation of new tanks. <br /> The assessment is intended to determine whether soils surrounding the existing tanks contain <br /> petroleum constituents. If petroleum constituents are present, the assessment will allow for an <br /> estimate of the volume of soils that would be removed during tank placement activities and require <br /> treatment to reduce petroleum constituent concentrations to acceptable levels. Upon removal of the <br /> i 1 <br /> existing tanks,soil samples will be collected from below the tanks and submitted to a sta;ty-certified <br /> laboratory for analysis,as required for tank closures. <br /> 1.1 Purpose <br /> The pre-tank pull soil assessment will be undertaken to: <br /> o Determine if soiisadjacent to the existing tank basin contain detectable concentrations <br /> 4 of petroleum constituents. <br /> o If the soils do contain petroleum constituents, determine the distribution and extent <br /> t of these constituents. <br /> o Determine if soils in the area of the new tank basin contain detectable concentrations <br /> of petroleum constituents. <br /> o Evaluate the need for additional investigation. <br /> 12 SCgpg pf 3YOTk <br /> i <br /> To accomplish these objecti�es, the following work is proposed: <br /> i o Advance exploratory soil borings with a hollow-stem auger drilling rig. <br /> i <br /> km M11000 al MCBMIM111=I IMM <br />