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Geo(ogicaf7"echnics Inc. <br /> 2741 RivuRaad 5 9 <br /> Mode o,califomia 953 <br /> (209)538-"241FaX#538- 852 <br /> June 3, 1998 <br /> Project No.: 507.2 <br /> Project Name: Geo C rp. (W. Charter Way) <br /> Mr. Mike Infurna <br /> San Joaquin Count EHD <br /> 304 E. Weber Ave., P Flc or <br /> Stockton, CA 95202 <br /> Re: Summary of June 1 , 1998 Phone Meeting <br /> J.M. Equipment Company, hic., 1245 W. Charter Way, Stockton, CA 95206-1108 <br /> USTCFP Claim N .: 12607;PHS/EHD Case No.: 9401 <br /> Dear Mr. Infurna: <br /> Thank you for your time y review of the JM Equipment file and response to our earlier phone <br /> conversations. For our c nvenience and to be sure we are on the right track, I have prepared the <br /> following summary of oui phone meeting of June 3, 1998 in which we discussed the changes that <br /> should be made to address the issues of well installation and oxygenated fuel compound testing. <br /> The points of our conversa 'on were: <br /> 1. The primary goal is to efine the lateral and vertical extent of the soil and groundwater plume. <br /> 2. Three water table mot 'toring wells and one deeper aquifer monitoring well should be installed. <br /> One of the water table wells and the deeper well should be installed near the former tank location. <br /> The upgradient wells uld be closure to the source. Well#JM-2 is fine. <br /> 3. The water table wells 3hould be constructed to accommodate the high water table and should be <br /> screened from 10 to 3 C feet. This year may set a new seasonal high for groundwater. <br /> 4. The deeper well shoul be screened with a 2.5 to 5 foot screen at a depth that is appropriate for <br /> defining the vertical a ent. <br /> 5. A pilot borehole should be drilled prior to well installation and discrete soil and groundwater <br /> samples should be col.ected. GTI recommend that the SimulProbe tool be used to collect these <br /> samples. This boreho a should be used to determine the depth that the short-screened deep well <br /> should be installed. The test results should be used to help in the contaminant mass estimate <br /> calculations. <br /> 6. Only one vapor extrac 'on well should be installed in one of the borehole at this time and should <br /> have a screen interval of 5-15 feet. <br /> 7. After these well have )een installed, the oxygenated fuel compounds should be tested for in two <br /> monitoring events. I hese should include: MTBE, DIPE, TAME, ETBE, TBA, ethanol and <br /> methanol. <br /> Rely Sub ,tte , <br /> CJeolia�ical2 nits Z <br /> Raynold I. Kablanow II, PI i.D. <br /> cc: Ms. Nancy Nelson <br />