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BENZENE CONCENTRATION VS. TIME <br /> MW-4 <br /> 2.00----.- <br /> 1 .75- -................ ................................. .............I....................... ............ ............................................................................................... <br /> 1 .50.................................................. . . . . .......... ............................................................. <br /> 1 .25............................ ................................................. ........ <br /> +j California MCL <br /> 1 .00-.- <br /> .. .... ... .................... ........ <br /> 0.50 <br /> ...... .......... ..........................--------------................................................. <br /> .. ..... .. ....... <br /> 0.25......................................... ............................................. ................................. .......................... .............................. <br /> 06/16/87 04/27/88 08/2/89 04/16/91 <br /> 10/07/87 07/26/88 09/22/90 <br /> S 1 <br /> "Impling Dates <br /> 7 G <br /> 91 ' d Z00 ON 19: �- -e W <br />