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GEOSYNTEC CONSULTANTS <br /> rr <br /> Ms. Amy Terrell <br /> 18 November 2004 <br /> Page 3 <br /> ammonia as nitrogen (EPA Method 3503), the finnigants 1,2-dibromo-3-chloropropane <br /> (DBCP), ethylene dibromide (EDB), and 1,2,3-trichloropropane (1,2,3-TCP) <br /> (EPA Method 504.1), carbamate and urea pesticides (EPA Method 8321), and volatile <br /> organic compounds (EPA Method 802113). Samples taken from monitoring wells MW- <br /> 2 and MW-3 were also analyzed for chlorinated herbicides (EPA 8151) per the MRP. <br /> Analytical results from APPL for the current sampling event are summarized in Table 3, <br /> along with historical results. The APPL analytical laboratory report is provided in <br /> Attachment 2. <br /> The following discussion of analytical results is organized according to the position <br /> of the monitoring wells relative to the site; i.e., upgradient (MW-1 and MW-4), <br /> immediately downgradient of site operations areas (MW-2 and MW-3), and <br /> downgradient of the site(MW-5). <br /> Uparadient—MW-1 and MW-4 <br /> _ Wells MW-1 and MW-4 are located hydraulically upgradient of the site operations, <br /> in the southwest and northwest areas of the site, respectively. Concentrations of TON <br /> detected in samples taken from these-wells during the current sampling event were 9.03 <br /> and 3.95 mg/L, respectively. Ammoni was detected in monitoring well MW-4 at a <br /> concentration of 9Z-mg/L. <br /> Pesticides and VOCs were not detected in the upgradient wells in the 3`d quarter <br /> 2004,which is consistent with previous sampling events. <br /> ,= Operations Area—MW-2 and MW-3 <br /> Wells MW-2 and MW-3 are located on the downgradient property boundary, in the <br /> northeast and southeast areas of the site, respectively. Groundwater elevations and <br /> chemical data for TON, ammonia, 1,2-dichloropropane (1,2-DCP), and DBCP in well <br /> MW-2 are plotted versus time on Figure 6, and nitrate and ammonia in MW-3 are <br /> plotted versus time on Figure 7. <br /> In MW-2, TON was not detected and the concentration of ammonia was 84 mg/L, <br /> which is the lowest ammonia concentration in MW-2 since November 1999. MW-2 is <br /> P:\PRJ2003REM\WFS\VER\MONF\3QO4\WC04066.dm <br />