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C <br /> Mr, James Brathovde �# <br /> February 28, 1997 <br /> Page 3i <br /> Comment: s 4 <br /> f „ <br /> The information used to develop the recommendation is inaccurate, The <br /> Site has been determiner) as a source for the 1,2-DCA and other VOCs detected in <br /> soils and groundwater beneath the Site by DTSC. Therefore, site-specific <br /> hydrogenlogical date is deemed necessary in developing a cast-effective cleanup <br /> strategy for the Site_ The groundwater data collected is to be compiled into a c <br /> computer data base.-Which is being developed by the City' s consultant, Henshaw <br /> Associates, in conjunction with other hydrogeological data compiled from the City <br /> of Lodi. The purpose is to develop a comprehensive groundwater cleanup <br /> strategy, not only for this Site, but also for the City. Mr. Rempel should be aware <br /> that, for a Site suchtas this, piece-meal pump and treat groundwater treatment <br /> systems at the Site will be very costly and may not be effective. <br /> DTSC has required the Site's responsible parties(RPs) to conduct semi- <br /> annual groundwater sampling at the five monitoring wells{DTSC November 4 <br /> 1996 letter). Accordingly, groundwater on and off the'Site is to be sampled in <br /> May 1997. In view of the importance of developing a cost-effective <br /> comprehensive cleabup strategy for this Site as well astfor the City, DTSC <br /> maintains that the five monitoring wells must be maintained for continuing <br /> monitoring purposet Implementation of the recommendation will leave DTSC no <br /> alternative but to require the RPs to construct new wells so that groundwater <br /> sampling will be possible. i> <br /> I hope the above information will clarify the issue. If;you have any <br /> questions, please contact meat(916) 323-3372 or Mr Jerry Marcotte at <br /> (9 16) 322-9224. <br /> Sincerely, E <br /> Ae <br /> JZx <br /> r <br /> ` Jean Young !I <br />' s Hazardous Substances Engineer <br /> Site Mitigation Program <br /> E� <br /> F <br /> Enclosures � €� <br />