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S E C ® R <br /> . Mr Mike Infurna <br /> March 8, 2005 <br /> Page 5 <br /> RECENT QUARTER ACTIVITIES (Fourth Quarter 2004) <br /> • Quarterly groundwater monitoring and sampling performed by TRC on October 26, 2004 <br /> • Prepared and submitted the quarterly summary report <br /> • Installed well MW-15 (report documenting installation will be included with the installation of <br /> well MW-16 and MW-17) <br /> NEXT QUARTER ACTIVITIES (First Quarter 2005) <br /> • Perform quarterly groundwater monitoring and sampling (TRC) <br /> • Prepare and submit a quarterly summary report <br /> • Install deep monitoring wells MW-16 and MW-17 <br /> • Prepare and submit report documenting the installation of wells MW-15, MW-16, and MW- <br /> 17 <br /> RECOMMENDATIONS <br /> The site should continue to be monitored and sampled on a quarterly basis to verify the stability of <br /> the plume beneath the former 76 Station Joint monitoring and sampling with the upgradient ARCO <br /> station will continue so that regional groundwater flow and chemical isoconcentration maps can be <br /> generated <br /> CHARACTERIZATION/REMEDIAL STATUS <br /> Soil contamination delineated? Yes <br /> Dissolved groundwater delineated? No <br /> Free product delineated? NIA <br /> Current phase of project? - _ AssessmenVMonitonng <br /> Frequency of sampling? Quarterly <br /> Soil remediation in progress? No <br /> Anticipated start date? NIA <br /> Anticipated completion date? NIA <br /> Shallow zone groundwater gradient? Regional 0 005ft/ft Northeast <br /> Deep zone groundwater gradient? 0 004 ft/ft Northeast <br /> NEIGHBORING SITE ACTIVITIES <br /> The upgradient ARCO Service Station, located at 16 E Harding Way, appears to be affecting <br /> groundwater concentrations within wells at the site Remedial efforts conducted at the ARCO Service <br /> Station are summarized below <br /> NEIGHBORING SITE ACTIVITIES <br /> Soil Vapor Extraction System <br /> SVE was started on June 14, 2003 The SVE portion of the DPE system is-comprised of 6 SVE <br /> . wells (SVE-1, SVE-2, MW-1, MW-2, MW-4, and EW-7) and a Thermatech VAC 50 thermal/catalytic <br /> oxidizer (Cat-Ox) as the abatement device Approximately 355 pounds (lbs) of TPHg, 2 lbs of <br /> I 1ConocoPhi1hps\Retad Sites144091Qssrs1200444Q2004_QSR doe SECOR Intemational Incorporated <br />