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�l <br /> Mr Terry Tarditi <br /> May 11, 2004 <br /> Page 2 <br /> Status of Investigation and Cleanup Activities <br /> Four groundwater monitoring wells have been installed at the site as shown in <br /> Figure 1 Quarterly groundwater monitoring has been ongoing since 1998 <br /> Previous groundwater morutormg results indicate hydrocarbon-impacted <br /> groundwater extends from the former source area (4,000-gallon UST) to beyond <br /> the most southerly well (MW-3) <br /> Groundwater Sample Requirements <br /> BC's Workplan for Quarterly Sampling of Monitoring Wells describes that each <br /> site monitoring well will be sampled and water levels measured quarterly (January, <br /> April,July, and October) In addition, the water supply well, located to the north <br /> of the tyre shop, has been added to the quarterly sampling program A report <br /> summarizing these activities is due to PHS/EHD the month following the end of <br /> the previous quarter (April,July, October, and January) Samples are required to <br /> be analyzed for the following constituents total petroleum hydrocarbons as <br /> gasoline (TPH-G), by EPA method 8015 Modified, benzene, toluene, <br /> ethylbenzene, and xylene (BTEX), and UFT oxygenates by EPA method 8260B <br /> PHS/EHD has also required 1 2 DCA and EDB analysis <br /> Groundwater Disposal <br /> Purge water from this sampling event was placed into drums and disposed of <br /> properly by T&T Trucking, Inc <br /> Quarterly Results Summary <br /> Historical groundwater elevation data is summarized in Table 1 Table 2 <br /> summarizes groundwater flow direction and gradient Table 3 summarizes the <br /> historical analytical results for petroleum hydrocarbon constituents Figures 2 <br /> and 3 present groundwater elevation contour maps for the third and fourth <br /> quarters, respectively Analytical results are presented for each well on Figures 4 <br /> and 5 MtBE isoconcentration maps are presented on Figures 6 and 7 Field data <br /> sheets from the August and December 2003 quarterly groundwater sampling <br /> Ibis report;iuf prepared to accorcidnee with the standards f the entironmental con rullm&mdurtry a1 the tame it Ivo r prepared It should not be <br /> relied upon by parties other than those for wham a user prepared and tben only to the extent of!be Trope of uvrk whtrb uvr authorr ped Thu <br /> rrport does notguarantee[hal no addutonal enurrrrnmental contamrnatton beyond that desnrbed in ibis report evrte at the rue <br /> Y\21000\21417\RLporrs\3rdand4th 03ytrs doc <br />