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Mr. Joyesh Chandra <br />March 1 1 , 201 1 <br />Page 2 <br />• For probes 20 feet deep or less, turn on sample pump, observe and record methane, <br />oxygen, and carbon dioxide gas concentrations, when readings have stabilized for <br />30 seconds. <br />For probes more than 20 feet deep, turn on sample pump, extract a minimum of one <br />probe volume, observed and record methane, oxygen, and carbon dioxide gas <br />concentrations, when readings have stabilized for 30 seconds. <br />• Close test valve, disconnect sample instruments and secure sample location. <br />In accordance with the testing schedule, all perimeter GW probes are to be tested at a minimum, on <br />a quarterly basis. On January 29, 2013, all perimeter Gas Monitor Probes defined as GW Nos. 1 <br />through 7 were tested. Test results (Table 1) indicated that all GW probes tested exhibited <br />methane gas concentrations below the LEL (5 percent by volume) or no methane gas was detected. <br />The next required quarterly monitoring event, second quarter 2013 (April through June) is <br />scheduled to be performed before the end of the month of June 2013. <br />This report addresses conditions at the subject site during the test dates only. Accordingly, we <br />assume no responsibility for any changes that may occur subsequent to our monitoring which <br />could affect the quantity of LFG at the subject site or adjacent properties. <br />Should you have any questions, do not hesitate to contact either of the undersigned. <br />Very truly yours, <br />{ <br />Ft' ;q 7�F�/o •� i _ t �' i` Ufi e'm ty,ri <br />Rebecca L. Lucero Arthur E. Jones, Jr. <br />Project Coordinator Project Manager <br />SCS FIELD SERVICES SCS FIELD SERVICES <br />11 <br />