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b w �ax <br /> =U ` <br /> TO,' s '�{ ', <br /> z <br /> La>maersville School District <br /> 202/799-8221 <br /> -• July 28. 1987 <br /> MONITORING WELL INSTALLATION <br /> The soil borings were converted to groundwater monitoring <br /> wells to provide access for long term monitoring and water <br /> an , shows the location of the <br /> sampling . figure 2 , site Pl <br /> monitoring wells . <br /> eter <br /> The wells were cons tructedoslattedhwell mscreenschedule <br /> ha, l <br /> ndwere <br /> PVC casing and 0.020-inch machine <br /> ti installed to a total depth of approximately 20 feet (exrept MW2, <br /> 10 feet) . The wells were constructed with <br /> which was drilled to <br /> a 15 foot screened interval from 20 feet l0 5e <br /> toeestablish belowet l <br /> the <br /> MW1 and MW2 were constructed different Y <br /> the contaminant encountereddetermine <br /> vertical extent of screened <br /> if a vertical gradiation exists at t <br /> t to 12 feet below grade while MW2 was screened from <br /> .�' from 21 feeendix I , >lriii Logs , for <br /> 10 feet to 5 feet below grade (see App <br /> construction details) • <br /> onsisting <br /> of clean $2 Monterey sand was placed <br /> A sand pacK c <br /> the bow <br /> In the annulus of each well finterval . The wells werecompleted <br /> point 1 foot above the screen to <br /> with a bentonite seal , cement , and a traffic rated street box <br /> provide access to the wells . <br /> � 7 <br /> iavr - e, <br />