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The soil above 20 feet had background levels of hydrocarbon <br /> vapors. <br /> The analysis of the soil samples obtained from the well borings <br /> for MW-4, below 20 feet, had detectable concentrations of TPHG, <br /> MTBE or BTEX. <br /> The soil samples taken from the MW-5 boring from 30 feet below <br /> grade to 70 feet of drilling contained No detectable pxyti.�' <br /> concentrations of TPHG, Benzene, Ethylbenzene, Xylene or MTBE. ' 1 , n� <br /> The concentrations of TPHG, TPHD and BTEX in the groundwater <br /> samples from the five wells require further investigation. <br /> However, the results obtained in the first sampling of newly <br /> constructed wells may not be representative. JPCA recommends <br /> that approximately three months to four months or about the <br /> middle of December 2000, the wells be purged and pumped before <br /> sampling. Prior to the purging and purging water depth <br /> measurements should be taken for gradient calculations. <br /> This report has been prepared specifically for Jay McIlrath with <br /> specific application to a hazardous waste investigation. The <br /> report has been prepared with the care and skill generally <br /> exercised by reputable professionals, under similar <br /> circumstances, in this or similar localities. No other warranty, <br /> either expressed or implied, is made as to the professional <br /> { advice presented. <br /> A copy of this report will be sent to Carol Oz Sr. RENS of the <br /> SJCEHD as required in the permit application and regulations. <br /> If you have any questions, please call us. <br /> Sincerely, <br /> Xincipal Cummings, R , REP, 'CHMS �REp GE John N.Alt,CEG <br /> 5� O�ocEpigene International <br /> `� J014N N. ALT <br /> N2 1136 <br /> CERTIFIED <br /> ENGINEERING <br /> GEOLOGIST \P <br /> 11 <br />