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GEOSYNIEC CONSULTANTS <br /> Ms. Amy Terrell <br /> 6 July 2005 <br /> Page 2 <br /> �. SAMPLING PROCEDURES <br /> The 2"d quarter 2005 remediation pilot study monitoring event at the WFS Vemalis <br /> facility was performed on 2 June 2005. Blaine Tech Services, Inc. (Blaine Tech) of <br /> San Jose, California, performed all fieldwork. Blaine Tech's report, including field <br /> procedures and sampling logs, is provided in Attachment 1. <br /> GROUNDWATER ELEVATIONS. <br /> Depth to groundwater was measured in monitoring wells MW-1, MW-2, MW-3, <br /> MW-4, MW-5, and MW-6 during the 2"d quarter 2005 monitoring event. Table 1 <br /> summarizes the depth to groundwater measured during this and previous sampling <br /> events. <br /> ANALYTICAL RESULTS <br /> Keystone Laboratories of Newton, Iowa, analyzed groundwater samples collected <br /> from monitoring wells MW-2 and MW-6 for the suite of bioremediation parameters <br /> including volatile organic compounds (EPA Method 8260B), permanent gases (ASTM <br /> Method D1945), metabolic acids (by HPLC/UV), conventional chemistry parameters, <br /> and total and dissolved metals. Analytical results for the 2"d quarter 2005 sampling <br /> event are summarized in Table 2. The analytical laboratory report is provided in <br /> Attachment 2. <br /> Monitoring well MW-2 is located immediately downgradient of the pilot study test <br /> plot and monitoring well MW-6 is located in the center of the test plot. Observations <br /> related to monitoring the pilot study are summarized below. <br /> ♦ In MW-2, the concentration of 1,2-DCP detected during a 2"d uarter <br /> 2005 monitoring event was 14.1 micrograms per liter(gg/L). <br /> ` ♦ The concentration of 1,2-DCP in intergrid well MW-6 was 34.5 µg/L., <br /> the lowest since the start of pilot study and below the concentration of <br /> the baseline event. <br /> r„ P:\PRR003REM\WFS\VER\MONG\2Q05\2Q2005.dw <br /> _. s <br />