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P.O. Box 4353, Mountain View, CA 94040-4353 <br /> HYDRO-GEO CONSULTANTS, INC. (650) 428-0588 • FAX (650) 428-0589 <br /> March 24, 2002a `,[_,) <br /> Project 2267-E MAR 2 9 2002 <br /> EidVII-:Oi'a'c'�L11'I HEALTH <br /> PER ivlli IF 3 RVICES <br /> Environmental Health Department San Joaquin County <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202-2708 <br /> Attention: Ms. Lori Duncan, Senior REHS <br /> Subject: Sutter Office Center <br /> 242 Sutter Street <br /> Stockton, CA 95202 <br /> (APN 139-250-05; Site Code 9327) <br /> Dear Ms. Duncan, <br /> Our firm has requested that Sutter Office Center consider using the services of Gettler- <br /> Ryan, Inc. to mitigate the residual hydrocarbons in the soil and groundwater at the <br /> captioned site. This firm is currently mitigating the problem on the adjacent property and <br /> have done a through study of this entire area; consequently, they can more effectively <br /> deal with this matter. <br /> In response to the comments in your March 22, 2002 letter, our report was based on the <br /> specific work plan presented in your February 2, 2001 letter; see Attachment 1. As stated <br /> in this work plan we obtained soil.in the shallow groundwater zone and water samples at <br /> depth in Probe "H" to test for the presence of residual hydrocarbons. <br /> Soil samples were previously logged and analyzed from Probes "A" and "B" (see <br /> Attachment 2) that are directly adjacent to Probes "I" and "J". These two probes on <br /> January 31, 2002, were only to obtain groundwater samples for analysis from the deeper <br /> portions of the aquifer. <br /> The on-site vertical and horizontal extent of residual hydrocarbons in the soil and <br /> groundwater was presented in our report, based on our probe and monitoring well data, as <br /> shown on Attachment 3. <br />