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f <br /> RECEIVE® <br /> DEC 13 2013 <br /> .l 1244 Pyrites Way-Gold River, H95670' <br /> E N V I R 0 T E C H. I N C . ` 'Phone 916,851:01.74,0FaiS1�1�f1�1�14 � �1 15249 <br /> ' �FRPAIT/S :. <br /> December 10; 2010 <br /> .. . . <br /> Mr. Nuel Henderson <br /> . Y. <br /> San Joaquin County Environmental Health Division ` <br /> 600 East:Main Street, <br /> ` Stockton;California 95202=3029' <br /> Subject-_ Drilling Addendum Letter, <br /> Moore Petroleum Bulk Plant <br /> 5491 `F' Street, Banta, California <br /> Apex Project No. ERA02.004 <br /> Dear Mr. Henderson: <br /> Apex Eiivirotech, Inc. (Apex).has been authorized by Moore Petroleum (Moore) to: submit the <br /> following drilling addendum to install,five-soil vapor points at the subject site. <br /> After the -Geoprobe rods have reached the desired depth to extract soil vapors, Apex personnel <br /> will set a bentonite seal at the base of the rods and the top`to create an airtight seal.,.The sample <br /> will not be extracted from the Geoprobe rods until at least 20 minutes have passed from the <br /> completion of the seals. After the soil vapor samples have been collected the Geoprobe rods will <br /> be extracted from the soil. Grout will be mixed and poured down.into the open borehole to the <br /> surface in order to seal the boring.: <br /> - Work is scheduled to be' in in Janu 201 T. f Tf <br /> g ary` you have`any}quesfions'or concerns;please`- 7� <br /> contact me at 775-980-5336. <br /> Sincerely; <br /> APEX ENVIROTECH, INC... <br /> j . . <br /> Xavier Tarango-Castorena <br /> Staff Engineer <br /> cc: File ,,. <br />