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ITRS i i <br /> 18600701.09220 <br /> 10 June 2004 <br /> Mr.Marshall Cloud <br /> Defense Logistics Agency JUN 2 <br /> Defense Distribution San Joaquin California,Tracy Site 8 2004 <br /> DDJC-FA,Environmental Management ENVIRONMENT HEALTH <br /> Building 100,Room 2,Ext.4129/4067 <br /> 25600 Chrisman Road PERMIT/SERVICES <br /> Tracy, CA 95376-5000 <br /> Re: Destruction of DDJC-Tracy Boundary Piezometers PZ4,PZ5,and PZ7 Located on <br /> Bird Road,DDJC-Tracy Site(F41624-03-D-8609/Task Order CM01-023) <br /> Dear Mr. Cloud: <br /> During the first quarter 2004(1Q04)groundwater monitoring event at DDJC-Tracy,URS personnel <br /> found that boundary piezometers PZ4,PZ5, and PZ7 had been destroyed. As you are aware,the <br /> boundary piezometers are critical to the DDJC-Tracy monitoring program and future groundwater <br /> modeling efforts for the site. Mr. Harlan Knoll of the San Joaquin County Environmental Health <br /> Division (SJCEHD)has been contacted regarding the destruction of the piezometers.He has requested <br /> that a memorandum be submitted to the SJCEHD to determine if the method used by Black and Veatch <br /> to abandon piezometers PZ4,PZ5, and PZ7 during construction of the water transmission pipeline along <br /> Bird Road is acceptable by the county. Mr. Knoll has requested a summary of any groundwater <br /> sampling that was done near the piezometers to verify whether groundwater is contaminated in the area, <br /> piezometer construction information, lithology information on where the piezometers are screened, the <br /> method of abandonment used by the contractor that installed the pipeline,a map of the area, and other <br /> pertinent information to help the county perform its review of the abandonment activities. <br /> To facilitate the SJCEHD's request for review of the piezometer abandonment,URS is including the <br /> following information in this memorandum: <br /> • URS/Radian CPT Investigation Report from groundwater sampling conducted along Bird <br /> and Lovely Roads, east and north of the DDJC-Tracy Depot,respectively; <br /> • Piezometer installation and construction information; <br /> • Map of the boundary piezometer locations and damaged piezometers; <br /> • Summary letter from Black and Veatch that describes the destruction of the piezometers; <br /> and <br /> • Map of the pipeline section being constructed as part of the South County Water Supply <br /> Program. <br /> URS Group, Inc. <br /> Crown Corporate Center <br /> 2870 Gateway Oaks Drive, Suite 300 <br /> Sacramento,CA 95833 <br /> Tel:916.679.2000 <br /> Fax:916.679.2900 K:\W process\D0701\Tracy1PZ DeswctioMSlCE M Mesno.doc <br />