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Nov-29-01 12 : OOP P•02 <br /> CH2M HILL <br /> 155 Grand Avenue <br /> Suite tow <br /> 0 Oakland,CA <br /> CH2MHILL <br /> 94612 <br /> P.O.Box 12681 <br /> November 21,2001 Oakland,CA <br /> 94604-2681 <br /> 131420.A1.09 Tel 510.2512426 <br /> F*t 510.883.8205 <br /> Michael Infuma <br /> San Joaquin County e D <br /> Public Health Services/Environmental Health Department <br /> 304 E.Weber Avenue <br /> Third Floor <br /> Stockton,CA. 95202 <br /> Subject: Modification to Proposed Location of Monitoring Well MW-DIS-1113,Del Monte <br /> Disco Site,110 Filbert Street, Stockton,California <br /> Dear Mr. Infuma: <br /> This letter is written to document our phone conversation on November 26,2001,regarding <br /> the change in location of deep monitoring well MW-DIS-11D at the Del Monte Disco Site <br /> (Site).This monitoring well is being installed to monitor a deeper water-bearing zone <br /> (approximately 140 to 160 feet bgs)downgradient of the site,within the 1,2-DCA plume. <br /> The original proposed location of MW-DIS-11D is adjacent to boring CPT-12.We have <br /> moved the location of this well approximately 50 feet west,adjacent to CPT-11. <br /> CPT boring logs indicate that the deeper water bearing sand zone is present at borings <br /> CPT-11 and—10 and is absent at boring CPT-12.Installation of monitoring well <br /> MW-DIS-11D adjacent to CPT-11 will provide a more effective monitoring point of the <br /> deeper water-bearing zone.This revised well location is still within the 1,2-DCA plume. <br /> Should you have any questions regarding this change please do not hesitate to contact me at <br /> 510-251-2888 x2101. m- <br /> t <br /> Sincerely, ti SAN JOAGUIN COUNTY <br /> CH2M L ENVIRONMENT NM7H�bM <br /> . . <br /> p4 E WYboAa�. :. <br /> - ltloddolb G X205 . � .a , <br /> Keith Sheets, PAM <br /> Project Managerer IM � <br /> 80 <br /> SF0\MW-1113 modificatiorLdoc <br /> c: Mike Infurna/San Joaquin Counj PHS <br /> Steve Erickson/Del Monte <br /> Rich Fish/Del Monte 092 : _p 9 <br /> Lucius Taylor/CH2M HILL App► cf t�PkVw mail 4- 0* Wide <br /> sown and dsadw tyre on but dogs not w Oft <br /> mr approve any or vfdook n or dovkkm of requkwM to <br /> of:�:':te !aws er Local Ordinarces. <br />