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Nomelllini Property <br /> 1045 W . Charter Way, Stockton <br /> CPT report comment <br /> Page 3 of 3 <br /> An additional complication exists with monitoring wells MW- 1 , MW-2 and MW-3 . <br /> The boring logs for all three wells indicate sand from 5 ' to 55' bgs . The wells are <br /> screened from 33' , 32 ' and 30' bgs to 53' , 52' and 50' bgs , respectively. CPT-I <br /> and CPT-2 logs indicated clayey lithology from approximately 32 ' and 32' bgs to <br /> 42 ' bgs . SJCEHD is concerned that the well screen intervals may be providing a <br /> vertical pathway between HU-2 and HU-4. The wells and logs should be <br /> carefully reevaluated and the wells replaced if it cannot be shown that the wells <br /> are not providing a vertical conduit between permeable hydrologic units . <br /> It should be noted that SJCEHD will not concur with a closure request with <br /> dissolved 1 , 2-DCA still unassessed or with the extent of impacted groundwater <br /> yet unknown , and the Central Valley Region Water Quality Control Board <br /> (CVRWQCB ) is extremely unlikely to concur if such a recommendation were <br /> forwarded to them from this office. <br /> A work plan that addresses the above noted concerns should be submitted to <br /> SJCEHD and the site further assessed before closure requests or remedial <br /> actions are initiated . <br /> Please contact Michael Infurna at (209) 468-3454 or Nuel Henderson (209) 468- <br /> 3436 if you have any questions. <br /> Donna Heran , REHS , Director <br /> Environ ental Health Department <br /> Ae 1, 44 r 49 011ft <br /> Michael J . Infuma Jr. , Senior REHS Nuel C . Henderson Jr. , PG <br /> LOP / Site Mitigation Unit IV LOP / Site Mitigation Unit IV <br /> mil <br /> c: CVRWQCB — James Barton , Sacramento . <br /> c: AGE — Tim Cuellar, 837 Shaw Rd , Stockton . <br /> c: SWRCB-Clean Up Fund — Mark Owens , Sacramento , <br /> i <br /> f <br />