Laserfiche WebLink
r <br /> Wm. J. Hunter & Associates f 2220 Loma Vista Dr <br /> Registered Geologists , f', I-i/,Sacramento, CA 95825 <br /> Petroleum & Mineral Appraisers i (916) 972-7941 <br /> -7 FAX (916) 972-1683 <br /> April 3 , 1997 <br /> Linda Turkatte, Sr RSHS <br /> San Joaquin County PHS <br /> Environmental Health Division <br /> P p Box 388 <br /> Stockton, CA 95201.-0388 <br /> Ref Marci ' s Diesel Service, 2969 Loomis Road, Stockton CA <br /> Site Code 2015 <br /> Dear Linda, <br /> As instructed by your office, we have enclosed a workplan for <br /> placing one (1) 4" groundwater monitoring well on the above site <br /> Once approval is received, we will assist the Marci ' s in <br /> selecting bids and obtaining pre-approval from the Cleanup Fund <br /> staff Although we have not made an estimate of costs to do the <br /> work, the placement of the soil boring by Lush Geosciences cost <br /> approximately $8300, not including well completion or water <br /> sampling <br /> We wish to go on record that we do not believe this additional <br /> work is justified based upon the data available to date There <br /> is no evidence that the contamination has migrated very far from <br /> the source, and the technology for remediating clayey soils in <br /> situ at these depths does not exist Excavation is not a viable <br /> option at these depths, and would require the removal of the <br /> building on the property <br /> Many sampling events have shown that the gradient is divergent, <br /> which supports our belief that the aquifer is very limited in <br /> size and has extremely low porosity & permeability This is <br /> indicated by the fact that the potentiometric surface is below <br /> 80 ' (based on the Lush soil boring, ) but the static level in the <br /> wells is about 681 . Releasing the confining pressure allows the <br /> water to reach equilibrium It is apparent that there is little <br /> or no horizontal communication with other sands <br /> t <br /> Please give us a call if you have any questions <br /> SincWe , <br /> Wmer <br /> cci <br /> Garrison Law Corp <br />