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INFLUENT BTEX CONCENTRATIONS VS. TIME <br /> TRI-VALLEY GROWERS/THORNTON <br /> 140 Ism <br /> 1400 <br /> 120 Remediation system start-up May 13, 1991 130° <br /> 1200 <br /> 100 1100 <br /> 1000 <br /> .a <br /> CL 900 a <br /> CL <br /> f C` <br /> O 800 V i <br /> O <br /> ai 700 v <br /> V <br /> U 600 X <br /> 500 i <br /> I <br /> 4,1 <br /> i <br /> 400 i <br /> 300 <br /> 20Q " <br /> 100 <br /> Q <br /> 05/21/91 06/13/91 08/16/91 09/12/91 10109/91 12/19/91 03/12/92 06/08/92 09/04/92 01104!93 03/25/93 06/28/93 <br /> SAMPLE DATE <br /> BENZENE + TOLUENE -SIE- ETHYLBENZENE -W XYLENES <br /> FIGURE 4 <br />