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i <br /> I28 October 2005 <br /> AGE-NC Project No 95-0130 <br />' Page 13 of 13 <br /> • Continued quarterly groundwater monitoring of wells VW-1 (Band C), VW-2A, VW-3A, <br /> MW-6 (A-E) and MW-7 (A-E) The Second Quarter 2005 ground water monitoring event <br /> is tentatively scheduled for 06 June 2005 <br />' • Conduct future ground water monitoring events concurrently with the Knowles/Roek <br /> Property site (102 South Wilson Way) and the Arco AM/PM site (130 South Wilson Way), <br /> • Continued quarterly depth-to-water measurements in all monitoring wells at the site, but <br /> reduced ground water sampling frequency from a quarterly to a semi-annual program, AGE <br /> believes that continued quarterly ground water sampling from wells MW-1 through MW-5 <br /> I at this stage of the investigation is not cost effective and will not provide enough useful <br /> information to supplement the ongoing investigation Semi-annual sampling events should <br /> be adequate to monitor ground water impact at these wells and should be re-evaluated on a <br /> Isemi-annual basis <br /> • In a letter dated 31 August 2005,the SJCEHD reiterated that a work plan must be submitted <br /> to complete the lateral characterization and delineation of the dissolved plume As a result, <br /> a work plan for cone penetration testing (CPT) soil borings was submitted to the SJCEHD <br /> on 15 November 2005 Upon SJCEHD-approval, AGE will submit all necessary drilling <br /> 10 <br /> permits, permit fees and schedule field work <br /> 1 7.0. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities The findings were based mainly <br /> upon analytical results provided by an independent laboratory Evaluations of the hydrogeologic <br /> conditions at the site for the purpose of this investigation are made from a limited number of <br /> available data points (soil vapor samples, ground water samples), and subsurface conditions may <br /> vary away from these data points No other warranty, expressed or implied, is made as to the <br /> professional interpretations, opinions and recommendations contained in this report <br /> Advanced GeoEn"ronmental,Inc <br />