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ACTON • ° <br /> MICKELSON <br /> ENVIRONMENTAL, INC. AUG 1 5 2006 <br /> Consulting Scientists, En N�/Si�tS <br /> I ERVICES <br /> August 14, 2006 <br /> Mr. Gerald Djuth, C.E.G., P.E. Via Overnight Mail <br /> California Regional Water Quality Control Board <br /> 11020 Sun Center Drive#200 <br /> Rancho Cordova, California 95670 16014.01 <br /> Subject: 2005 Annual Ground Water Monitoring Report <br /> Former Georgia-Pacific Corporation Chemical Packaging Facility <br /> 75 West Valpico Road, Tracy,California <br /> Dear Mr. Djuth: <br /> Enclosed is the 2005 Annual Ground Water Monitoring Report summarizing results of the <br /> monitoring event conducted September 27 and 28, 2005, at the former Georgia-Pacific <br /> Corporation Chemical Packaging Facility, 75 West Valpico Road, in Tracy, California(site). The <br /> report also presents a summary of all environmental activities conducted onsite in 2005. <br /> The inferred flow direction and hydraulic gradient for the second half 2005 are consistent with <br /> those in previous monitoring events. Chloroform concentrations reported in samples collected <br /> from site monitoring wells ranged from 0.99 to 28 micrograms per liter. The analytical results for <br /> the second half 2005 are generally consistent with historic trends. The next monitoring event at <br /> the site is scheduled for first half 2006. <br /> Please call Manoucher Salehi at (916) 939-7572 or myself at (916) 939-7550 should you have <br /> any questions regarding the material presented. <br /> Very truly yours, <br /> ACTON •MICKELSON •ENVIRONMENTAL,INC. <br /> � i <br /> Manoucher ehi ara J. Mickelsc .E. <br /> Project Manager California Registered Professional <br /> Engineer#43417 <br /> Y:\2005 Ltrs&Rpts\16014.01\aeports\2H05\Cover Letter.doe <br /> 5175 Hillsdale Circle,Suite 100 (916)939-7550 <br /> El Dorado Hills,California 95762 Fax(916)939-7570 <br />