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w <br /> v <br /> Universal Forest Products page 2 <br /> 26200 Nowell Rd, Thornton. , <br /> EHD considers the vertical extent of soil contaminants tested for as vertically <br /> delineated in the former UST pit. A mass calculation and a fate transport <br /> evaluation of the residual petroleum must be prepared to determine if this-mass <br /> will continue to degrade the shallow ground water. With the presence of ' <br /> elevated levels of total petroleum hydrocarbons as motor oil in the soil qpd <br /> ground water sample under the former UST, EHD is concerned that the contents <br /> of the former UST have not been determined. In order to verify if this UST was <br /> used as a 'waste' tank, please analyze future soil and ground water samples for <br /> the following constituents: <br /> • TPH as oil and grease, (8015m), <br /> • Chlorinated Hydrocarbons, (8010 or 8260B report all peaks) <br /> • Priority metals, (Cd, Cr 3 & 6, Pb, Zn, Ni, [ICAP or AA]), <br /> • PCB, PCP, PNA, Creosote (8270). <br /> With shallow ground water located beneath this site and the presence of private <br /> drinking water wells in close proximity, EHD requires you identify and sample any <br /> private drinking water wells that could be endangered by this UST release. <br /> Please identify the sensitive receptors (drinking water wells, subsurface potential <br /> migratory pathways, etc) within 2000 feet. Each drinking water well should be <br /> sampled under access granted by the well owner. Subsurface pathways <br /> (pipelines, sewer lines, storm water lines, power/cable trenches) should be <br /> identified and mapped and included in a report to EHD. Drinking water wells that <br /> have been impacted by Universal Products former UST release must be reported <br /> to EHD immediately and Universal Products must provide potable water to users <br /> of the well. <br /> Soil boring logs were not included in the ICES report. Please have you <br /> consultant submit the boring logs to EHD and include boring logs in all reports of <br /> findings on future phases. <br /> EHD approved sampling for the fuel oxygenates in the November 18, 2004 work <br /> plan but neither MtBE or the other oxygenate data was included in this report. <br /> UST sites are required to sample and analyze for MtBE and the other fuel <br /> oxygenates. The fuel oxygenates (MtBE, TAME, EtBE, TBA, DIPE, ethanol, <br /> methanol), as well as the `waste' UST constituents listed above are to be <br /> analyzed for in the soil samples and the ground water samples collected in the <br /> next investigative phase for this site and included in the report submitted to EHD. <br />