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the nearest 0 01 foot, referenced to an arbitrary datum of 100 00 feet The surveyor was unable to <br /> identify an established benchmark in the site vicinity The surveyor's report is included as Appendix <br /> C <br /> 2 3 3 Groundwater Monitoring, Sampling and Analysis <br /> On June 2, 1998, prior to groundwater pumping, depth-to-groundwater was monitored using a <br /> water level indicator capable of measurements to within 0 01 foot Following groundwater level <br /> measurement, the wells were purged with an electric pump and sampled <br /> Groundwater was sampled from the wells using a disposable bailer and laboratory-supplied <br /> containers Each sample container was labeled, packaged in an iced cooler and transported under <br /> chain-of-custody documentation to Kiff Analytical, L L C (Kiff) a state of California-certified <br /> hazardous waste testing laboratory (DOHS #2236) Kiff analyzed the groundwater samples on a <br /> standard turn-around time of 5 working days for TPH-as-diesel, TPH-as-gasoline, BTEX and MTBE <br /> by Modified EPA Methods 8015 and 8020 To evaluate the possible presence of alcohol- and <br /> ether-based oxygenate compounds, Kiff also analyzed the 3 groundwater samples collected from <br /> the monitoring wells by EPA Method 8260 <br /> . 2 3 4 Waste Storage and Disposal <br /> All waste sod, equipment ansate wastewater and purged groundwater were contained in separate <br /> 55-gallon drums for temporary storage and proper disposal Since no detectable concentrations of <br /> diesel or gasoline hydrocarbons were detected in soil samples analyzed from SB-6 and MW-2, the <br /> sod from these bonngs was emptied from the drums and disposed of by spreading on the site The <br /> remaining waste soil will be transported off-site for disposal, once the waste profiling process is <br /> completed Documentation of the waste soil disposal will be forwarded to PHS/EHD, upon <br /> completion of this task <br /> On July 2, 1998, Ramos Environmental Services (Ramos) removed approximately 150 gallons of <br /> wastewater from the site Ramos recycled the wastewater at their facility in West Sacramento, <br /> California A copy of the waste manifest is included in Appendix D <br /> • 7 <br />