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(K�LE NFEL DER <br /> 1,,,hl P-pleRight 1,1­o <br /> (PID) was conducted in the field which measures ionizable compounds in air in parts <br /> per million by volume (ppmv). Soils near groundwater had a PID reading of 162 ppmv; <br /> however, other soil samples, even those collected near samples with notable TPH-MO <br /> concentrations, did not have positive PID readings. A single grab groundwater sample <br /> was collected from B-1. Additional soil samples were collected from 3 borings (B-2, 13- <br /> 3, and B-4) at depths of 1/2, 5, and 10 feet bgs at various locations within the building. <br /> Groundwater was not detected in these boreholes. The borings were advanced <br /> following the coring of the wooden plank floor using a limited access Geoprobe drill rig. <br /> The sample locations are shown on Plate 1 . <br /> A total of 12 soil samples and one groundwater sample were collected and chemically <br /> analyzed. The samples were submitted under chain-of-custody control to a laboratory <br /> approved by the State of California Department of Health Services for the following <br /> requested analyses: <br /> • TPH-D and TPH-MO by EPA Method 8015M <br /> • BTEX <br /> • Fuel oxygenates: MtBE, TAME, ETBE, DIPE, TBA by EPA Method 8260B <br /> • Volatile Organic Compounds (VOC) (groundwater only) by EPA Method <br /> 8260B <br /> Note: Samples were not analyzed for methanol and ethanol due to the non-detectable <br /> concentration of other fuel oxygenates in accordance with discussions with City of Manteca <br /> personal involved with the project. Based on our discussions with the City of Manteca, we <br /> recommended and were approved to analyze the groundwater sample for VOCs. <br /> The boreholes were closed with neat cement made level with the existing ground <br /> surface and inspected by an EHD representative. The laboratory results for soil <br /> samples collected are shown on the following Table 1. The laboratory reports are <br /> shown in Attachment A. <br /> 112884.1/ST010R366R Page 4 of 10 October 1, 2010 <br /> Copyright 2010 Kleinfelder Revision 1,dated November 22,2010 <br />