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A S S O C I A T E S I N C <br /> ADDITIONAL ACTIVTTIEES <br /> On October 27, 1998, ATC personnel transported three drums of soil cuttings to the Forward <br /> Landfill in Stockton, California The soil cuttings were generated during the installation of <br /> monitoring wells MW1 through MW3 The drums were transported under a non-hazardous <br /> waste manifest and disposed of at the Forward Landfill A copy of the non-hazardous waste <br /> manifest is Included in Attachment 3 <br /> CONCLUSIONS <br /> Concentrations from wells MW 1 through MW3 remain consistent with the results from the <br /> previous sampling event The direction of groundwater flow is consistent with the previous <br /> event The magnitude of the gradient has changed by a factor of 100 This may be due to tidal <br /> influences from the nearby delta Groundwater elevations have decreased since August 1998 <br /> RECOMMENDATIONS <br /> Based on the results of the fourth quarter 1998 monitoring episode, we recommend the following <br /> o Conduct the First Quarter 1999 groundwater monitoring and sampling of wells MW1 <br /> through MW3 and analyze samples for TPHg, TPHd, and BTEX <br /> Please contact our office at (209) 579-2221 if you have any questions or comments <br /> Respectfully submitted, <br /> ATC Associates Inc <br /> Drew Van Allen <br /> Staff Scientist �. �`� ;EAN,N E <br /> t r_s <br /> r <br /> 1*,,'o "L1n�!R%y+I Jt <br /> � F <br /> Jeanne Homse Y, Exp ` <br /> y <br /> CA Registered Civil Engineer No 47410 , J'�. } CIVIC. <br /> * f 4IF- <br /> cc Mr Steve Oliver, Continental Grain <br /> Mr George Handler, Continental Grain <br /> Mark List, RWQCB <br /> w 1625001quw11y14gr-1998 dm 3 <br />