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U <br /> Mr.Marshall Cloud <br /> 10 June 2004 <br /> Page 3 <br /> Abandonment of Piezometers during Pipeline Installation—Black and Veatch Letter <br /> Black and Veatch submitted a letter to the Defense Distribution Depot San Joaquin California Tracy <br /> Site dated 4 March 2004 and addressed to Mr.David Pieczynski of URS Corporation, the Project <br /> Manager of the DDJC Sharpe and Tracy Groundwater Monitoring Programs (Attachment 3). The letter <br /> addressed the destruction of piezometers PZ-5 and PZ-7 located on the west side(but within the right- <br /> of-way)of Bird Road and,also,the protection of PZ-4 by the Black and Veatch/Nolte construction crew <br /> during the installation of the water transmission pipeline for the South County Water Supply Program. <br /> The location of the South County Water Supply Program pipeline is presented in Attachment 4. <br /> According to the letter,the piezometers were abandoned by backfilling with sand,which violates the <br /> well abandonment code established the State of California Department of Water Resources (DWR) <br /> Well Code(Bulletin 74-90 of California Well Standards). The letter indicates that two piezometers <br /> (PZ-5 and PZ-7)were destroyed during the pipeline installation;however,URS field personnel also <br /> determined that PZ4 may have been destroyed during the installation of the pipeline since it was not <br /> located during the groundwater level measurement activities on 26 February 2004. <br /> Closing Remarks <br /> The information in this memorandum should be forwarded to Mr.Harlan Knoll (SJCEHD)to determine <br /> if the method of piezometer abandonment performed by Black and Veatch/Nolte is acceptable by San <br /> Joaquin County,and that no additional abandonment activities will be necessary. <br /> If you should have any comments or questions regarding the contents of this memorandum,please <br /> contact me at(916)679-2038. <br /> Sincerely, <br /> David A.Pieczynski <br /> Senior Geologist <br /> URS Corporation <br /> DAP/gng <br /> Attachment 1:Bird and Lovely Road CPT Groundwater Investigation Results <br /> Attachment 2: Boundary Piezometer Location Map <br /> Attachment 3: Black and Veatch Letter Regarding the Monitoring Wells on Bird Road <br /> Attachment 4: Map of South County Water Supply Program—Pipeline Section 1 <br /> c: John Guzman,DDJC <br /> Paul Townsend,CESPK <br /> Verne Brown, CESPK <br /> Michael Thomas,URS <br /> Dick Van Dyke, URS <br /> Thomas Cudzilo,URS <br /> K:\W process`00701\Tmcy\PZ Des"ctionSXEnD Memo.dw <br />