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ya <br /> 1117 Lone Palm Ave. , Suite B <br /> Modesto, California 95351 <br /> p www.a209 ,579,2221 <br /> 209 .579.2221 <br /> A S S O C I A T E S I N C : it l l Fax 209 .579 .2225 <br /> 1 Z <br /> April 3 , 2002 <br /> 54. 62596 . 0001 <br /> Mr. and Mrs. Farmer <br /> 3810 Fourteen Mile Drive <br /> Stockton, California 95219 <br /> Subject: Schedule of Field Activities at 610 North Hunter Street, Stockton, California <br /> Dear Mr. and Mrs. Farmer: <br /> ATC Associates Inc. is presenting this schedule to inform you of field activities that will be <br /> occurring at the 610 North Hunter Street, Stockton, California property during the week of April <br /> 15 through 19, 2002. These activities are necessary for the installation of the subsurface <br /> remediation system at the site. <br /> Monday, April 15 : A concrete cutting subcontractor will cut a 180 foot long and 2 <br /> foot wide trench in the surface of the site. The concrete cutting subcontractor will also remove <br /> and dispose of the concrete and asphalt that is cut out. ATC will be on-site to supervise the <br /> subcontractor. This activity will require that we block the driveway from Oak Street into the site. <br /> Tuesday, April 16 : An excavating subcontractor will dig a trench 2 foot deep inside the <br /> area that was cut out by the concrete cutting contractor. The excavated soil will be loaded <br /> directly into trucks and transported to Forward Landfill in Stockton for disposal. Also on this <br /> day, ATC personnel will begin placing vapor extraction and air sparge piping into the trench. <br /> ATC will be on-site to supervise the subcontractor. This activity will require that we block the <br /> driveway from Oak Street into the site. <br /> Wednesday, April 17 : ATC will complete the placement of subsurface piping into the <br /> trench. The excavation subcontractor will fill the trench with clean Class II aggregate base rock <br /> to approximately 2" below the ground surface. ATC will be on-site to supervise the <br /> subcontractor. This activity will require that we block the driveway from Oak Street into the site. <br /> Thursday, April 18 : An asphalt surfacing subcontractor will fill resurface the trench area <br /> with asphalt. ATC will be on-site to supervise the subcontractor. This activity will require that <br /> we block the driveway from Oak Street into the site. <br /> ATC will set up safety barricades and caution tape around the area to prevent access to the trench <br /> area during all field activities. <br /> w9wordpro\62596\letters\farmerlener 1 <br /> ENVIRONMENTAL, GEOTECHNICAL AND MATERIALS PROFESSIONALS <br />