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bNM�NT91 <br /> 11jF <br /> K <br /> fff'!r F r <br /> !F <br /> SER V ICES <br /> July 28, 1994 <br /> Project 113-13 <br /> Mr. John Johnson <br /> The Customer Company <br /> P. O Box 886 <br /> Benicia, CA 94510 <br /> Subject Groundwater Sampling Report, Second Quarter, Second Year, for <br /> Cheaper' #76, 890 North Main Street, Manteca, California <br /> Dear Mr Johnson <br /> This report describes the field methods used to obtain groundwater samples and the 1 <br /> laboratory analysis results for the samples from the site referenced above (Figure 1 - <br /> Site Location Map) <br /> I. SITE HISTORY <br /> Two underground gasoline storage tanks were removed from the subject property <br /> in February, 1987 Soil samples collected during the tank removal showed detectable <br /> amounts of TPH-g and BTEX On March 5, 1987, Memfelder consultants reported <br /> that three monitoring wells (MW-1 through MW-3) were installed on March 2, <br /> 1987, south, north and northwest, respectively, of the former underground storage <br /> tank location The wells were developed and sampled March 3, 1987 Groundwater <br /> was encountered at 13 feet below ground surface All groundwater samples were <br /> analyzed for TPH-g (total petroleum hydrocarbons as gasoline) and BTEX (benzene <br /> toluene, ethylbenzene and xylenes). All samples were ND (non detect) except for <br /> benzene, detected at 3 5 ppb (parts per billion) in MW-1 and 13 ppb in MW-3 <br /> On November 13, 1987, Kleinfelder requested to dispose of purge and sample water <br /> collected from the wells The purge and sample water collected April 28, 1987 were <br /> non detect On June 21, 1988, a Kleinfelder report documented that groundwater <br /> samples collected May 27, 1988 were ND. The depth to groundwater was 20 feet BGS <br /> (below ground surface) <br /> Recycled Paper <br /> 190 East 7th Street Pittsburg, CA 94565-2317 & FAX (510) 439-2566 • Phone (510) 439-1024 <br />