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3 is suspect as the lid had been removed and the casing plug was not in place <br /> ' Extra effort to purge the contained water was made prior to sampling After <br /> sampling the well was carefully secured It may be noted that the previous <br /> quarterly readings of MW No 3 were a low of 0 19 mg/ltr in September 2003, <br /> ' 0 39 mglltr in December 2004 and the current 0 58 mglltr in March 2004 <br /> Contamination levels in this well will be scrutinized after the next quarterly <br /> sampling (June 2004) <br /> On November 5, 2003 four new holes were pushed using a CPT rig to ground <br /> water to sample outlying groundwater to determine if the new sampling points <br /> ' were beyond the underground hydrocarbon plume A fifth hole was pushed to a <br /> depth deeper than the expected water table but no groundwater was <br /> ' encountered <br /> Groundwater contamination between 50 to 55 FT bgs exists Diminishing <br /> hydrocarbon contamination was found north of the site's property during the <br /> November CPT borings While the leading edge waits to be defined, the original <br /> underground storage tanks (USTs) source has been removed, contaminant <br /> ' levels are low near the north property line fence and the closest operating offsite <br /> down gradient well is at least 600 FT away Additionally, residual soil <br /> contamination possibly contributing to the contamination has been identified and <br /> Removal of a portion not covered by structures may be anticipated <br /> A summary of all ground water sampling events is included REFERENCE <br /> ATTACHMENT 2, SUMMARY OF LAB RESULTS included with the report <br /> A copy of Del-Tech Geotechnical Support Services field 26 March 2004 monitoring <br /> report is attached <br /> In an effort to establish a "clean line" further out from the source, CPT borings were <br /> ' camed out in November After receiving laboratory results further probang was <br /> desired Continued effort during the winter was deemed not practical until ground <br /> bearing capacity of access roads improved late in Spring 2004 <br /> ' encountered levels of hydrocarbon (diesel) were between <50ug/I and 260 ugh <br /> The encou Y ( <br /> at depth of about 60 FT bgs in the plume during the November CPT sampling <br /> Additional CPT bonngs to sample groundwater are proposed in May 2004 to further <br /> define "a clean line" further distanced from the suspected source as well as further <br /> west and east from the previous CPT borings Our December 2003 quarterly report, <br /> included a copy of "PRESENTATION OF CONE PENETRATION TEST DATA", <br /> prepared by GREGG IN SITU, INC as ATTACHMENT 8 <br /> 3 <br />