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I i <br /> Graph 3 - Concentrations of Hydrocarbons in Piezometer NP-1-111 during <br /> C-Sparge System Operation <br /> 2,000 30 <br /> 1,800 - <br /> -- 25 <br /> 3 <br /> 1,600 <br /> 1,400 - 2a <br /> , <br /> 1200 <br /> � a <br /> a <br /> 15 <br /> 1,000 <br /> w <br />'I4 <br /> 800 m <br /> 10 <br /> boa <br /> Based Began Prot Test <br /> 400 Additional sparge Points instai ea 5 <br /> 200 <br /> f <br /> 0 0 <br /> �, � o o O h h h h h h h h h h h h `L rL rL �► `L `L "� "� "� `� `� 3 "� <br /> o�\���o,���poh\o���0�o�ph\gyp��\o\�o\p���o�,�\o��,�\hog h\o��\��6�o��\h,�����\���,�h\ry�\�`,�o\�\��o\�►,\o��,\ory����►�\�\���\��\�\��o��►,\oho\�,��\ <br /> Sampling date <br /> —w—TPHg (in ppb) 0 benzene (in ppb) <br /> I <br />