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On October 21, 1999, Ramage Environmental toured the site vicinity to confirm the locations and <br /> operating status of the previously identified wells, and to look for other wells in the vicinity Two <br /> wells identified at DWR (Well Numbers 2 and 3 in Appendix D) are residential domestic wells <br /> along Raylow Avenue and Mylnar Avenue Raylow Avenue is immediately east of the site and <br /> Mylnar Avenue is east of Mylnar Avenue <br /> An interview with Mr Jim Laberdee of 117 Raylow Avenue revealed that most of the homes on <br /> Raylow and Mylnar Avenues have domestic wells According to Mr Laberdee, when the city <br /> ' annexed these two streets in the late 1980's, the residents were allowed to keep their wells <br /> and/or connect to the city water service If they opted to connect to city service, an above- <br /> ground back-flow device was required to prevent mixing the city water and the well water <br /> Of the 52 residences on Raylow and Mylnar Avenues, only eight back-flow devices were <br /> observed Of the 13 residences on the southern half of Raylow Avenue, Mr Laberdee knew of <br /> at least six that were not connected to city water <br /> ' During a preliminary site inspection of the subject site, one on-site water well was identified in <br /> the south-central portion of the property (Figure 2) This well is operational and supplies water to <br /> the service station <br /> 2 3 1 On-Site Domestic Well Sampling and Analysis <br /> On September 2, 1999, Ramage Environmental monitored and sampled the on-site domestic <br /> ' well The total depth of the well was measured at 43 feet The depth-to-groundwater was <br /> monitored at 18 8 feet bgs <br /> Prior to sampling the well, it was purged by running the faucet at the station for approximately 15 <br /> minutes Following recharge, a sample was collected from the well using polyethylene tubing <br /> ' and a check valve The groundwater sample was labeled and stored in an iced cooler for <br /> transport with chain-of-custody documentation to Kiff Kiff analyzed the groundwater sample for <br /> TPH-as-gasoline, BTEX, MTBE, DIPE, ETBE, TAME, TBA, methanol and ethanol by EPA <br /> Method 8260B <br /> 11 <br />