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r` <br /> SAN JOAQUIN COUNTY PUBLIC HEALTH SERVICES <br /> ENVIRONMENTAL HEALTH DIVISION <br /> SITE MITIGATION UNIT San Joaquin • <br /> 304 E.WEBER STREET Public Health <br /> STOCKTON CA 95201 Services <br /> Dot Lofstrom <br /> PHONE:(209)468-3436 Environmental <br /> FAX#209 468-3433 Division <br /> Email: dlofstromt7o.r)hs.hsc.co.san-ioaauin.ca.us <br /> F Ag" i <br /> I <br /> To: Peter Hudson FROM: Dot Lofstrom <br /> PHS/EHD SITE MITIGATION UNIT <br /> Fax: 415 896 0332 Pages: 2 <br /> Phone: 415-896-5900 Date: 7/26/01 <br /> Re: 1081 Mendocino, ESA project 200252 <br /> I <br /> ❑ Urgent ❑ For Review ❑ Please Comment ❑ Please Reply ❑ Please Recycle <br /> i <br /> l <br /> • Comments: <br /> Peter and Jennifer, <br /> I've looked at your proposed wells and I do have suggestions for alternative placement. I would <br /> suggest you move well MW-2 west about 30 or 35 feet. I know that the presumed direction of <br /> groundwater flow is north/northeast but we don't really know that for a fact. Recall that one of the main j <br /> reasons the Board has asked for additional monitoring wells is to establish the direction of groundwater <br /> flow. With MW-2 a few more feet to the west,you'll be able to solve for groundwater flow direction and <br /> gradient using MW-2, MW-1,and MW-4- <br /> The second suggestion is to move MW-3 just a bit north, out of the excavation. Since you presumably <br /> removed the contaminated soil in the excavated soil, we would be more interested in the groundwater <br /> directly north of the former location. I suggest you place the well in the vicinity of TP-4, in native soil. <br /> I will be out on vacation July 30 through August 3. If you have any questions and you can't contact me <br /> today(Friday),just leave a message on my voice mail at(209)468-3436 (which is a different number <br /> on our fax cover sheet you sent to me). Also, please note that the fax number for my <br /> from the one <br /> Y <br /> floor is(209)468-3433. If you use that number instead of the general one,faxes will reach me faster. <br /> Dot Lofstrom <br /> i <br />