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" 6 <br /> KLEINFELDER <br /> The PTD field screening will provide a qualitative indication of petroleum <br /> A <br /> hydrocarbons in the soil. The PID will assist in guiding the direction <br /> and limit of the excavation, and in selecting the confirmation samples for <br /> quantification by a certified analytical laboratory. <br /> go <br /> 3.3 CONFIWIATION SAMPLING <br /> Upon completing the additional soil excavation, confirmation soil samples <br /> P <br /> will be collected from the walls of the excavation to assess the presence <br /> ka <br /> of petroleum hydrocarbons remaining in the soil. Based on the results of <br /> the PID screening, a minimum of two soil samples will be analyzed on a <br /> 24-hour RUSH turnaround schedule for total petroleum hydrocarbons <br /> extractable by. GC/FID and volatile aromatic compounds (benzene, toluene, <br /> r' ethyl be :ene, and xylene) by FPA Method 8020. The actual number of <br /> confirmation samples submitted will be discussed and coordinated in the <br /> field with SJLHD ' personnel. If significant petroleum hydrocarbon <br /> contamination is detected, additional soil will be removed where possible. <br /> Upon receipt of ..the analytical results for . ,the confirmation samples, <br /> r Kleinfelder will prepare a brief report .for submittal to the SJLHD, With <br /> SJLHT'_. . approval; The Customer Company will then proceed with the <br /> installation of new underground tanks. The PID screening and confirmation <br /> samples '"will . be used to show that the :TPH concentrations have been <br /> excavated to acceptable levels. Installation of : the new tants will <br /> require' the excavation `:of. additional soil. As a precaution, this"soil <br /> will be screened in the field with the PID. If positive PID readings are <br /> ja <br /> recorded, the SJLHD will be notified. <br /> k <br /> 3.4: <br /> EXCAVATIQN LIMITS , <br /> � rr <br /> An attempt will be .made to excavate petroleum hydrocarbon contaminated <br /> soil to below.laboratory reporting : limits. The excavation will be <br /> continued until petroleum. hydrocarbons are not indicated in field <br /> screening results or analytical results. <br /> • - - f <br /> ti <br /> + 97-88-509 4 <br />