Laserfiche WebLink
t <br /> •onization detector (PID) was used in the field to screen the soil for volatile <br /> "c constituents below 10.3 eV. PID readings were not recorded from seven of the <br /> samples. Sample 38653, collected beneath the east 12,000 gallon tank had a PID <br /> g of 8 parts per million by volume (ppmv). <br /> n <br /> e locations of the tank excavations and sample locations are shown on Plate 1 ( Sample <br /> cation Map). A description of the tanks and sample numbers are as follows: <br /> SJLHD Sample PID <br /> Designation Location Size Number Reading <br /> 1160-2A West West excavation 12,000 38651 0 <br /> East South of Building unleaded gas 38652 0 <br /> Middle (aviation fuel) 38658 <br /> 1160-2 West East excavation 12,000 38653 8 <br /> East South of Building unleaded gas 38654 0 <br /> Middle 38657 0 <br /> 1160-4 West West of Building 10,000 38655 0 <br /> East unleaded gas 38656 <br /> AnaIYtical Results <br /> Eight soil samples were submitted under chain-of-custody to California Analytical <br /> Laboratories/Enseco. The samples were analyzed for total petroleum hydrocarbons <br /> (TPH) purgeable (Method 5030) by GC/FID; and benzene, toluene, ethyl benzene, and <br /> xylene (BTEX) by EPA Method 8020. In addition, the three samples (38651, 38652, 38658) <br /> collected beneath the west 12,000 gallon tank (which may have held aviation fuel) were <br /> analyzed for chlorinated hydrocarbons by EPA Method 8010, organic Iead and ethylene <br /> dibromide (EDB). The samples were analyzed on a two to three week regular turnaround <br /> schedule. <br /> The constituents were below laboratory reporting limits in the eight samples analyzed, and <br /> the presence of petroleum hydrocarbons was not indicated in the bottom of the three <br /> excavations. <br /> Limitations <br /> Kleinfelder performed this investigation in accordance with generally accepted standards of <br /> care which exist in Northern California at this time. It should be recognized that definition <br /> and evaluation of geologic conditions is a difficult and inexact art. Judgements leading to <br /> conclusions and recommendations are generally made with an incomplete knowledge of <br /> the subsurface conditions. More extensive studies, including subsurface investigations, may <br /> be performed to reduce uncertainties. If the client wishes to continue this investigation, <br /> Kleinfelder should be notified for additional consultation. No warranty, expressed or <br /> implied, is made. <br /> KLEINFELDER 9795 Business Park Drive, Suite C, Sacramento, CA 95827 (916) 366-1701 <br />