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�1 Al <br /> ��� �irvvioocHce cta � �Ioeue�teq .rte, Imes <br /> 1473 Hwy. 2 / P.O. Box 339 <br /> Wrightwood, CA 92397 <br /> August 24, 2001 Ph. (760) 249-5498 <br /> Fax (760) 249-1016 <br /> Sam Savig <br /> Public Health Services o <br /> San Joaquin County Environmental Health Division ' <br /> 304 East Weber Avenue, Third Floor c <br /> Stockton, CA 95202 <br /> N <br /> RE: Addendum to Workplan <br /> Frontier Transport, Inc. 3 <br /> 425 Larch Road ro <br /> Tracy, CA <br /> W <br /> -a <br /> Blakely Environmental Investigations, Inc. (BEII) proposes some changes in the <br /> workplan dated July 23 , 2001 . BEII proposes to extend the extent of excavation to 30- <br /> feet by 304eet and up to 204eet deep, depending on whether the foundation of the nearby <br /> shop becomes compromised. Groundwater will be pumped out of the pit during the <br /> excavation into Baker tanks for disposal under manifest by a licensed waste hauler. <br /> In addition, BEII proposes to install four additional groundwater monitoring wells to <br /> define the lateral and vertical extent of soil and groundwater contamination instead of one <br /> (See attached figure). Proposed monitoring wells MW- 12 and MW-13 will be advanced <br /> to 40 ' below grade and screened from 30 ' bg to 40 ' bg. Proposed monitoring wells MW- <br /> 14 and MW- 15 will be advanced to 20 ' bg and screened from 5 ' bg to 20 ' bg. <br /> If you have any questions regarding the workplan or addendum please feel free to call me <br /> at (760) 249-54988 . <br /> Th You, <br /> am Garcia <br /> REA IUVice President <br />