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r F <br /> ATC Associates Inc <br /> v 1117 Lone Palin Avenue, Suite B <br /> Modesto, California 95351 <br /> 209-579-2221 <br />' <br /> FaX 209-579-2225 <br /> ASSOCIATES S O C i A T E S I N C <br /> RECOMMENDATIONS <br /> Based on the results of the second quarter 2006 monitoring episode, we recommend the <br /> following <br /> • Continued monthly operation and maintenance of the soil vapor extraction system <br />' • Evaluate the hydrocarbon mass reduction and concentration trends to assure that the soil <br /> vapor extraction system is operating effectively <br />' • Perform third quarter 2006 groundwater monitoring and analyze groundwater samples for <br /> TPHg by EPA method 8015K BTEX by EPA Method 8021B, and oxygenate fuel <br /> additives by EPA Method 8260B <br /> Please contact our office at (209) 579-2221 if you have any questions or comments <br /> Respectfully submitted, <br /> ATC Associates Inc <br /> ' Vanessa Carney <br /> Staff Engineer s �i:v GCO, <br /> ' r N No 4450 C <br /> �J O "9 <br /> Lorraine M Sawyer FXP I-31 W <br /> Professional Geologist#4450 <br /> OF Ckt� <br /> Attachments <br /> cc Mr Raymond Greer <br /> Mr James Barton, RWQCB <br /> S 162588\03*arterW-nd qtr-2006 doe 8 <br /> 1 <br />