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r 4 <br /> S 1 <br /> S « <br /> F <br /> 15 April 1996 ' M <br /> AGE-NC Project No 95-0109- <br /> Page <br /> 5-0109_Page 7 of 7 <br /> h <br /> ' collected during the following quarter will be used to determine,the effectiveness of the nutrient <br /> addition and assess the possible need for future'inoculation x <br /> 1 <br /> 5 2 HYDROCARBON-IMPACTED SOIL <br />' No soil samples were collected during the first quarter of 1996 <br /> If ani~expedited remediation of the hydrocarbon-impacted soil is r"equired by the CVRWQCB, we <br /> recommend the addition of nutrients into the vadose zone The addition is proposed to be <br /> accomplished through existing vadose zone wellsrand the installation of temporary,casings where <br /> Iappropriate'wells do not exist A fertihzer medium similar to that proposed for ground water <br /> supplementation could be used <br /> IAs stated in previous reports, we recommend discontinuing the soil vapor monitoring at-the site <br /> Results of the soil vapor monitoring are of limited value Furthermore, enough soil-vapor data has <br /> been collected from the site to facilitate analysis of the 117-S1111program <br /> 6.0. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities The findings were based upon field <br /> measurements and analytical results provided by an independent laboratory Evaluations of the <br /> geologic/hydro geologic conditions at the site for the purpose of this investigation are made from a` <br /> limited number of available data points (i e monitoring wells) and subsurface conditions may vary <br /> away from these data points No other warranty, expressed or implied, is made as to the professional <br /> recommendations contained in this report F - <br /> r <br /> 1 u <br /> r r <br /> } 2 1 <br /> I y r <br /> t <br /> 1 <br /> 1 � 1 <br /> w • 4 i ti <br /> n 3 1 1 <br /> 1 <br /> I � <br /> r S r 1 r r a <br />