Laserfiche WebLink
i <br /> j C f <br /> 5157 West Business Loop 205 ;� ! <br /> Tracy, California <br /> PAR response letter,Page 2 <br /> r} <br /> if <br /> AGE evaluated over-excavation, bioremediation, and natural attenuation as <br /> remediation treatment for the contamination in the soil. AGE concluded excavation <br /> would be the most effective method. [ <br /> AGE evaluated groundwater extraction,in-situ bioremediation, and natural <br />�. attenuation as remediation treatment for the groundwater plume. AGE concluded <br /> that monitored natural attenuation would be the most cost'-'effective method when , <br /> coupled with excavation of the impacted soil. r <br /> I� <br /> EHD agrees with AGE's recommendation for limited over- <br /> excavation of the contamination <br /> in the soil as the treatment of choice. Given the limited size'of the'i estimated contamination <br /> in the soil, the need to perform active remediation to the prevent continued leaching into the <br /> groundwater and to protect the above-mentioned nearby doi`nestic 'Water wells from being <br /> impacted, over-excavation is the most effective method. EHD also agrees with AGE's <br /> recommendation for natural attenuation of the groundwater:' lumepat this time due to the <br /> . P <br /> overall reducing and low concentrations of dissolved c n <br /> g o tamtriantsi,observed in the � <br /> monitoring wells since 1998. <br /> Submit a work plan for an over-excavation of the im 'E <br /> p patted soil to EHD by August 31, 2005, <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> I <br /> i <br /> JeAWongg., ior REHS <br /> Margaret L gorio, REHS <br /> LOP/Site Mitigation Unit IV Supervisor <br /> c: Advanced GeoEnvironmental Inc. —Brian Millman f <br /> c: RWQCB, Central Valley Region—James L. L. Barton,, PG <br /> I� <br /> iI <br /> i <br /> ! <br /> k <br /> 3€ <br /> ii � 1 <br />