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<br />[[~ <br /> <br />March 30, 1990 <br /> <br />Mr. Len Copt <br />Roseville Public Schools <br />1251 West County Road B2 <br />Roseville, MN 55113 <br /> <br />STS Proposal P-2905 <br /> <br />Re: Petroleum Tank Release Investigation at Lexington School <br />1130 West County Road B2, Roseville, Minnesota <br />(LEAK 00001962) <br /> <br />Oear Mr. Copt: <br /> <br />STS Consultants, Ltd. is pleased to submit this cost proposal and associated scope of work <br />for professional engineering and environmental services to be performed at Lexington School <br />in Roseville, Minnesota. This proposal has been generated in response to your verbal <br />request of March 29, 1990. The following scop~ of work has been generated in accordance <br />with the recommendations outlined in the letter from Mr. Chris Zadak of the Minnesota <br />Pollution Control Agency (MPCA) dated March 27, 1990. <br /> <br />The scope of work involves performing one soil boring placed within the former fuel oil <br />tank excavation on the site. This boring will be advanced until contamination known to <br />exist in the excavation is no longer detectable by visual, olfactory or photoionization <br />detector (PIO) methods, or to groundwater, whichever occurs first. Groundwater at the site <br />is estimated is be at a depth of approximately 20 to 25 feet below the ground surface. The <br />boring will be sampled at standard sampling intervals. Samples will be classified in the <br />field by an environmental geologist/engineer and screened with a photoionization detection <br />(PIO) meter for the presence of volatile organic compounds (VOC's). <br /> <br />Two soil samples will be obtained from the boring to be submitted to a laboratory for <br />chemical analysis. The soil sample containing the highest level of petroleum contamination <br />detected visual, olfactory or PIO methods will be taken as one sample. The other sample <br />will be obtained from the bottom of the boring or directly above the groundwater table. if <br />groundwater is encountered. Samples will be analyzed for benzene, ethylbenzene, toluene <br />and xylene (BETX) and total petroleum hydrocarbons (TPH) as fuel oil. <br /> <br />A report will be generated which discusses the procedures employed and the results obtained <br />from this exploration. The report will also include conclusions and any recommendations <br />for additional work if required for the site. <br /> <br />The following cost estimate has been generated from the scope of work outlined above. <br />Actual costs may vary based upon drilling or site conditions at the time our services are <br />performed. <br /> <br />STS Con.ulUlng Ltd. <br />Consulting Engineers <br /> <br />3650 Annapolis Lane <br />Minneapolis, Minnesota 55447 <br />612.559.1900/Fax 612.559.4507 <br />