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s Mr Bob Fratto <br /> April 25, 1996 <br /> Page 2 <br /> from the fourth quarter 1995 to this quarter Water-level data are shown in Table 1 Histoncal <br /> groundwater flow directions and gradients are shown in Table 2 <br /> Analytical results of the groundwater samples for this and previous quarters are summarized in <br /> Table 3 The March 1, 1996 analytical results are shown on Figure 1 Laboratory reports are <br /> included as Exhibit A Analytical results identified very low concentrations of BTEX in all <br /> three wells, but did not identify any TPH-G, TPH-D, or TPH-MO compounds in any of the <br /> groundwater samples <br /> Discussion <br /> As expected water levels have increased due to winter rams Water levels may continue to <br /> increase through the second quarter of 1996 <br /> Coincident with the increase of water levels is the detection of BTEX constituents The third <br /> and fourth quarter 1995, analytical results indicated all constituents analyzed were below <br /> detectable concentrations All BTEX constituents are below their respective State Maximum <br /> Contaminant Level (MCL) for drinking water except for MW-1, the benzene concentration is <br /> 12 parts per billion <br /> If you have any questions regarding this report,please contact me at (916)4440123 <br /> Sincerely, <br /> WN CALDWELL <br /> B <br /> { i <br /> Pat G Cullen, R G #4932 <br /> Project Manager <br /> TMB ksc <br /> Enclosures <br /> cc Mr Steve Sasson, San Joaquin County Environmental Health Department <br /> Use or disclosure of data continued on this sheet is subject to the restriction specified at the beginning of this <br /> document <br /> 1422VtEPORTS\96QTR RPT\l ST'96QTR DOC <br /> i <br />