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Jnr <br /> December 24, 1991 <br /> Ms. Linda Turkatte Page 2 <br /> RE: Quarterly Monitoring Report <br /> h the site determined that <br /> Laboratory analysis of groundwater saples collected beneat <br /> m <br /> ene <br /> groundwater had Uccn iltcr��u�al tic 111 <br /> r <br /> r scmunarized af,lxa lle 2 stored in the former <br /> storage tank. Cir'oundwd Y <br /> Upon review of the Glatt► � }raire San � `in C } Public <br /> h Services, <br /> Ltrvironmcntal Elealtti Division, in letter dntedSepemUerl9, 1�gl, ��nestecquarterly <br /> groundwater monitoring and sanspling. <br /> RESULTS <br /> oratory results <br /> The groundwater monitoring wells were sampled onDecember beneath the s91. ite levels as high <br /> indicate that xylenes and ethylbenzene are present in groundwater <br /> as 3l0 and 1500 parts per billion (ppb), respectively. 'i'he state Ntaximum Coll tam rnant Levels <br /> (MCLs) for xylenes and ethylbenzene are 1750 and 680 ppb, respectively. Groundwater <br /> aYpeda] Laboratory sheets and lta <br /> analytical results are summe presented in Attchment Field purge logs re <br /> documentation for the reporting period <br /> included as Attachment 2. <br /> have dropped <br /> Groundwater levels continue ti decline <br /> "it <br /> 19 tile <br /> ]}G Groundwater <br /> co�ul HuesroJec to flow generally <br /> approximately e 1.5 ftsince <br /> southeast at a gradient of approximately 0.009, or 48 feet per mile (Figure 2). Groundwater <br /> monitoring data are summarized in Table 3. <br /> t <br /> PROI,OSED AC'I'IVI"t IES <br /> Activities proposed for the site during the upcoming quarter include 1) monitoring and sampling <br /> adree <br /> the three existing monrtherrdetine tilelliatu al rextent tof groundwater contaminatand ionrbenng eathhthe <br /> additional wells to fu <br /> site. A workplan outlining the proposed additional investigation will be submitted to t tie <br /> SICPHS under separate cover. <br /> [.CR1R12.3.7PI. <br />