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INFLUENT BTEX CONCENTRATIONS VS TIME <br /> TRI-VALLEY GROWERSITHORNTON <br /> 140 1500 <br /> 1400 <br /> 120 Remediation system start-up May 13, 1991 1300 <br /> 1200 <br /> 100 1100 <br /> 1000 <br /> CL <br /> CL 900 a <br /> 0 800 <br /> o U <br /> C <br /> l /Q <br /> U <br /> 700 <br /> U 6 C <br /> p 600 <br /> U X <br /> 500 <br /> 40- <br /> -400 <br /> 300 <br /> 2 200 <br /> ' 100 <br /> 0 0 <br /> 05/21/91 06/13/91 08/16/91 09/12/91 10/09/91 12/19/91 03/12/92 06/08/92 09/04/92 01/04/93 03/25193 <br /> SAMPLE DATE <br /> RE <br /> C', �� " x <br /> MAY 14 1993 BENZENE + TOLUENE —X— ETHYLBENZENE -f- XYLENES <br /> E VIRONMENTAL HEALTH FIGURE 6 <br />