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jD <br /> RECOMMENDATIONS <br /> ' AES recommends the following for the Canteen Facility <br /> 0 Continue quarterly groundwater monitoring and reporting, including measurement of <br /> ' depth to groundwater in each well, evaluating monitor well status, preparation of a <br /> potentiometric surface contour map containing the calculated gradient and <br /> approximate rate of groundwater movement, and preparation of isoconcentration <br /> ' contour maps for benzene and TPH(g) at the two different screen intervals <br /> Groundwater samples will be analyzed for BTEX by EPA method 8020, TPH(g) by <br /> EPA method 8015 modified, and TBA, MTBE, DIPE, ETBE, TAME, 1,2-DCA, and <br /> ' EDB by EPA method 8260B Groundwater monitoring will be performed in the <br /> second month of each quarter and quarterly monitoring reports will be submitted to <br /> the appropriate state agencies by the 15'x' of the first month following the end of each <br />' quarter <br />' If you have any questions or comments, or need additional information, please contact me at <br /> (512) 990-7467 <br /> Sincerely, <br /> APPLIED EARTH SCIENCES, INC. ¢ED GEO <br /> ERIC U1 <br /> t�•/� ¢' MUEHLBERGER <br /> Eric W Muehlberger, RG (CA #5255) No 5 <br /> Senior Hydrogeologist II <br /> CA <br /> Enclosures Tables <br /> Figures <br /> Appendix A <br />' cc Mr Richard Belthoff Mr Marty Hartzell <br /> Director of Real Estate Central Valley RWQCB <br />' Compass Group USA, Inc 3251 S Street <br /> 2400 Yorkmont Rd Sacramento, CA 95816 <br />' Charlotte, NC 28217 <br /> Canteen Facility April 13, 2001 <br /> Quarterly Groundwater Monitoring Report Page 5 <br />