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TABLE 2 <br /> GROUNDWATER MONITORING WELL <br /> LABORATORY RESULTS <br /> 1991 THROUGH 1993 <br /> (Results In parts per billion) <br /> IWell ID Sample Date Benzene Toluene l-bEthyXylenes TPH-alne <br /> RW-10 02/21/91 r r r <br /> 05/27/91 <br /> 08/26/91 — -- -- -- -- <br /> 11/26/91 .` = M = Y <br /> 03/30/92 <br /> 06/29/92 -- -- -- -- -- <br /> 12/23/92 -- — -- -- — <br /> 07/30/92 -- — _ _ Y <br /> 09/30/92 -- -- -- -- <br /> 12/23/92 <03 <03 <03 <05 <10 <br /> 04/02/93 <03 <03 <03 <05 <10 <br /> RW Recovery well <br /> MW Groundwater monitoring well <br /> ppb = Parts per billion <br /> TPH = Total petroleum hydrocarbons <br /> PW Pumping well <br /> Not sampled (not accessible or Insufficient water) <br /> Note ■ Monitoring Wells MW-2, MW-3, and MW-4, have been dry since 1987 <br /> ■ Monitoring Well MW-10 has been dry since 1990 <br /> ■ Monitoring Wells MW-11 and MW-14 have not been sampled since July of 1990, <br /> because concentrations of benzene and TPH-as-gasoline had been below the <br /> method detection limits since December of 1988 <br /> Monitoring Well MW-12 has been inaccessible since 1987 and Is no longer In use <br /> Recovery Well RW-1 was used as a vapor extraction well from January 1990 through <br /> January 1991 and not accessible for use until December 1992 <br /> I <br /> 1zy1Ro13 <br /> Page 7 of 7 <br /> [ GROUNDWATER <br /> TECHNOLOGY, INC <br /> I <br />