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i • These numbers represent very small concentrations, and in view of the fact that TT-2 is located only 15 feet from the downgradient edge of the former UST cavity, it is apparent that groundwater contamination at this site is neither excessive nor widespread 5.0 ADDITIONAL WELL SURVEY INFORMATION As requested by PHS/EHD, we contacted the owner of the the well at 705 E Lodi Avenue and reviewed the microfiche files at the PHS/EHD offices for additional information about wells within 2000 feet of the site The Lodi Avenue well is owned by the City of Lodi and is operated as a domestic drinking water well by the Department of Public Works According to Mr Frank Beeler of DPW, the well is numbered Municipal well 1-R and was drilled 1n 1988 The well is screened from 150 to 400 feet BSG and is completed with a gravel pack It is pumped intermittently as needed, at an average rate of 1,190 gallons per minute It's total production in 1999 was 1,917,000 gallons It was last sampled in 1997, and no petroleum hydrocarbons were detected It is due to be sampled again in 2000 The PHS/EHD microfiche files contained records for five private wells that had not been discovered during our previous file review at the California Department of Water Resources or our drive-by search of the area All records were in the form of drilling permits, Iittle or no information was available on the construction or use of the wells All five wells are located on North Cluff Street (one block east of the site) (Figure 4) The files . contained a permit for a well to the southeast of the site at the southwest corner of East Pine and North Cluff Streets No other information was provided Another well is located at 1200 East Pine at Cluff The well was drilled for domestic use, but no other information was included To the north, there was a permit on file for a 14-inch-diameter well near the interesection of Victor Road and Cluff There was also a well destruction permit on file for a 14-inch well at Stub's Paint and Body Shop at 320 N Cluff, which is near this interesection, but it was not clear whether these were the same or different wells The destructin permit was dated February 1986 The well was 250 feet in depth Farther north, a domestic well was listed at 544 N Cluff, 114 mile north of Victor Road No details were provided 6.0 CONCLUSIONS In the Third Quarter Report, we suggested that it may be possible to obtain unconditional regulatory approval for case closure if hydrocarbon concentrations remain low or show evidence of further decline The December result from TT-2 shows that the concentration has indeed declined below detectable limas In accordance with the December 1, 1999 correspondence from Ms Oz at PHS/EHD, we will prepare a cost estimate to write a Site Closure Report and submit it to the UST Cleanup Fund for pre-approval Assuming that the estimate is acceptable, we . 3