|
1
<br />' 15 January 2002
<br /> AGE-NC Project No 96-0232
<br />' Page 6 of 16
<br />' gallons, which equates to a mass of 8,220,499 pounds of water Multiplying the average MTBE
<br /> concentration (assumed to be 15 ug/l based on 06 September and 15 October 2001 Influent grab
<br /> water samples)by the pounds of extracted MTBE-Impacted ground water yields approximately 0 12
<br />' pounds of MTBE removed from MTBE-Impacted ground water between 06 September and 15
<br /> October 2001 (Appendix D)
<br />' The volume of extracted water between 15 October and 07 November 2001 was equal to 476,964
<br /> gallons, which equates to a mass of 3,976,449 pounds of water Multiplying the average MTBE
<br /> concentration (assumed to be 21 5 ugll based on 15 October and 07 November 2001 influent grab
<br /> water samples)by the pounds of extracted MTBE-Impacted ground water yields approximately 0 08
<br /> pounds of MTBE removed from MTBE-Impacted ground water between 15 October and 07
<br /> November 2001 (Appendix D)
<br />' The volume of extracted water between 07 November and 12 December 2001 wase equal to 772 136
<br /> q ,
<br /> gallons, which equates to a mass of 6,437,298 pounds of water Multiplying the average MTBE
<br />' concentration(assumed to be 20 yg/l based on 07 November and 12 December 2001 Influent grab
<br /> water sample) by the pounds of extracted MTBE-Impacted ground water yields approximately 0 13
<br /> pounds of MTBE removed from MTBE-impacted ground water between 07 November and 12
<br />'* December 2001(Appendix D)
<br /> Dunng the fourth quarter 2001, an estimated 0 36 pounds of MTBE was extracted from ground
<br /> water, to date, the ground water treatment system has removed a total of approximately 9 28 pounds
<br /> of MTBE from extracted ground water(Table 8) Fourth quarter 2001 mass-volume calculations of
<br /> MTBE-Impacted ground water extracted from the ground water pump-and-treat system are presented
<br /> In Appendix D Plots of cumulative ground water pump and treat mass removal trends and influent
<br /> ground water MTBE concentrations versus time are In Appendix E
<br /> 3.0. QUARTERLY GROUND WATER MONITORING AND SAMPLING EVENT
<br /> On 11, 12 and 13 December 2001, ground water monitoring and sampling were performed on 30
<br /> ground water monitoring wells(MW-1, MW-2,MW-4,MW-5,MW-6A,MW-6B,MW-7, MW-8A,
<br /> MW-8B, MW-8C, MW-9A, MW-9B, MW-9C, MW-10A, MW-10B, MW-IOC, MW-IOD,
<br /> MW-10E, MW-11A, MW-11B, MW-I1 C, MW-11D, MW-12A, MW-12B, MW-12C, MW12D,
<br /> MW-13A, MW-13B, MW-13C and MW-13D) As-built monitoring well construction details are
<br /> summarized In Table 9
<br /> In addition, ground water samples were collected from 9 extraction wells (EW-2, EW-3, EW-4,
<br /> EW-5, EW-6, EW-7, EW-8, EW-9 and EW-10), two domestic dnnlung water wells [one located at
<br /> 14659 Thornton Road (RDW-1) and the other at 14749 Thornton Road (DW-1)], and two San
<br /> Advanced GeoEnwronmental,Inc
<br /> I
<br />
|