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Il <br /> Pacific Gas & Electric Company I Page 3 <br /> Stockton Service Center <br /> Stockton , California <br /> OBJECTIVES OF STUDY <br /> i1 <br /> The objectives of the proposed engineering investigation are <br /> presented as follows : <br /># j <br /> 1 . Determine the existence and concentration of selected. <br /> components in the soil in the three areas of concern. <br /> f r 2. Evaluate the findings to determine the general extent <br /> of petroleum hydrocarbon migration in the area where' <br /> the tank , sump , and piping were located . <br /> i <br /> �P <br /> I The general scope of this investigation , which is deemed <br /> necessary to achieve the above-stated objectives , is as follows : <br /> 1 . Using a drilling rig , drill three test borings to a <br /> maximum depths of 5 and 10 feet below previous sampling <br /> depths . <br /> l <br /> 2 . Obtain soil samples from each boring at depths of 5 <br /> 4 feet and 10 feet below the original sample depths in. <br /> each area of concern. <br /> ` 3. Analyze each soil sample in the laboratory for the <br /> presence and concentration of selected . <br /> 'i <br /> TECHNICAL APPROACH <br /> i� <br /> We propose to obtain two soil samples in each of the three <br /> areas of concern . Representative soil samples will be collected' <br /> from Boring No . 1 at depths of 20 and 25 feet , from Boring No . 2- <br /> i+ <br /> it <br /> at depths of 10 and 15 feet , and from Boring No . 3 at depths of 8 <br /> and 13 feet . These soil samples will be collected from locations <br /> i that correspond to depths of 5 and 10 � feet below the original. <br /> soil samples obtained at the time the underground transformer oil. <br /> ' I! <br /> .i <br /> �� �ne�u,unimg rallmatnuea.�itc. <br /> i Fresno Modesto00 Visalia Bakersfield <br />