Laserfiche WebLink
the cause. Although that contamination does affect the accuracy <br /> of the tests, the levels present in the three wells far exceeds <br /> those minor amounts and do not negate the results. <br /> COMMENTS: <br /> 1 . The highest levels of BTEX & TPH-G continue to be present an <br /> the water beneath MW-1, which has never been in a downgradient <br /> position since monitoring began. PLATE III shows lines of equal <br /> concentration of benzene measured in the three wells during the <br /> August, 1994 sampling. This clearly indicates that either: (1 ) <br /> an offsite source exists; or (2) the groundwater gradients <br /> measured to date are not representative of prior directions. <br /> 2 Even though the title search recently conducted dad not <br /> identify a potential offsite source of contamination, the data <br /> obtained to date continues to indicate its' existence. The two <br /> recently completed monitoring wells should provide additional <br /> information concerning gradient directions & levels of soil & <br /> water contamination. <br /> 3. If the data from the two newly drilled wells confirms a <br /> "zero" line for soil & groundwater contamination, and gradient <br /> measurements continue to show an easterly direction, that will <br /> add support to our belief that another source of contamination <br /> exists We will then recommend that a detailed field inspection <br /> of the surrounding are be conducted in an attempt to identify <br /> such source or sources. <br /> We will add the two new wells to our quarterly monitoring <br /> program; any proposals for additional soil/water investigations <br /> will depend on results of the latest work & additional, gradient <br /> data. <br /> vV <br /> Wm. J. kanchez <br /> ter & Associates <br /> cc M. ��R�D GEO, <br /> E. Thayer, CVRWQCB <br /> V"NM J HUNTER <br /> N1860 <br /> OF CAS�F <br /> 2 <br />