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Page 2 <br /> 1305 Escalon Ave. J <br /> The proposed shallow screened vapor extraction well (screened from 12-27 feet bsg) <br /> the only shallow screened well proposed in this work pian."i The determination of an is <br /> effective radius of influence for this well will be difficult with no other similarly screened <br /> wells on site. PHS/EHD recommends that this problem be'iaddressed with another <br /> shallow screened vapor extraction well (or wells) placed in the source area. <br /> PHSIEHD approves the work plan, but would prefer to see the installation of vapor <br /> extraction wells in the source area now rather than later. PHSIEHD strongly <br /> recommends that all wells covered over with temporary steel covers be surveyed both <br /> horizontally and vertically to ensure their being located later:on. <br /> you have an f <br /> Y y questions or comments please call Lori Du <br /> If rrcan at (209) 468-0337. <br /> 1 <br /> . 1 <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> f <br /> Lc•-i,i C c cam+-w,ca.�.-, � .�.�u-� 1 <br /> � U <br /> Lori Duncan, REHS Margar! Lagorio, REHS <br /> Site Mitigation Unit IV Supervisor, Unit IV <br /> . 1 <br /> cc: Mark List, CVRWQCB ; <br /> Ray Kablanow, GTI <br /> 1� <br /> 1 <br /> �i <br /> i <br />