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� M <br /> s <br /> 4 , <br /> • �,�0�A}FryT <br /> /fir !C <br /> SERvic�`' <br /> November 13, 1991 <br /> Project Number 113-13 <br /> Mr. John Johnson <br /> The Customer Company <br /> P.O. Box 886 <br /> Benecia, CA. 94510 <br /> Subject: Report on Subsurface Investigation Work at Cheaper Store # 76, 890 <br /> North Main Street, Manteca, California <br /> Dear Mr. Johnson: <br /> Parker Environmental Services is pleased to provide this letter report concc ning <br /> the subsurface investigation work completed at Cheaper Store #76, as outlined by <br /> our work plan dated July 30, 1991. All work described. in the work plan has bee.,i <br /> completed and is described in this report. <br /> Introduction and Site History <br /> the project site is located on the southeast corner of the intersection of North Main <br /> Street and Jason Street, 1/2 mile north of the:town center (see Figure 1 -Vicinity <br /> Map). Two underground gasoline storage tanks were removed from the subject <br /> property in February,1987. Soil samples collected during the tank removal showed <br /> detectable amounts of TPH-g and BTEX. Three monitoring wells were installed <br /> Marsh 2,1987,by 1Cleinfelder, Inc.,and developed and sampled March 3,1987. <br /> Groundwater was measured at 13 feet below ground surface (BGS). Groundwater <br /> samples showed non-detect for TPH-g, Toluene, Ethylbenzene and Xylenes. Benzene <br /> was detected at 3.5 ppb in Monitoring Well 1,and 13 ppb in Monitoring Well 3. <br /> Groundwater samples coliected on April 28, 1987, May 27, 1988 by Kleinfelder, Inc., <br /> and November 12,1990 by Dames and Moore, Inc., all analyzed as non detect for <br /> IT'H-g and BTEX. <br /> Recycled Paper <br /> 4185 Rialto Court • Pittsburg, CA 94565 o FAX(510)439-2566 a Phone(510)439-I024 <br />