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,�--,.�,-_;� —,_�--.---_ - ----- ----�-w ---_ -----� ---r-- _----_-- � _W_ -�� - Pagels-- <br /> §eoCogua�rlecftnus 4nc -- -- —- <br /> Work Plan Addendum <br /> Project No 425 2 <br /> January 20, 1997 <br /> • 2 Milton Birkhahn - 1697 West,Durham Ferry Road <br /> 3 Muriel Jones - 31448 South Hwy 33 <br /> 2.2 Monitoring Well Installation <br /> To further investigate the lateral and vertical extent of gasoline and kerosene range petroleum <br /> hydrocarbons in-the soil and groundwater environments, Geological Technics Inc proposes <br /> to install five additional shallow groundwater monitoring wells surrounding the known <br /> plume area and one discretely screened deeper monitoring well (Figure 2 Site Map) <br /> Based on the seven months of groundwater measurements and gradient calculation, the <br /> groundwater exhibits a predominately north direction of flow <br /> ® The five new shallow wells (MW-4, 5, 6, 7 & 8) will be placed in a manner that will <br /> provide upgradient, perpendicular to gradient, and down gradient definitions of the lateral <br /> extent of groundwater contamination <br /> o The one new deeper well (MW-101) will be placed down gradient of the source near well <br /> MW-2 <br /> Refer to the attached site map for proposed well locations <br /> 3.4 SIGNATURE AND CERTIFICATION <br /> It is expected that this project be performed in accordance with accepted geologic and <br /> • hydrologic standards of the State of California accepted and in effect at the time of this <br /> investigation Geological Technics Inc is not responsible for undisclosed conditions <br /> This work plan was prepared by <br /> GGeofogzcaf 7ecFinws Inc. <br /> Michael J Niemi <br /> Geologist <br /> Raynold I Kablanow II, Ph D <br /> California Registered Geologist #5234 <br /> Registered Environmental Assessor#901 <br />