SITE INFORMATION AND CORRESPONDENCE

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-12/05/2000 17:07 FAX 200 94 021 - Maas KLEINFELDER If groundwater is encountered at a pushpro a location a single grab groundwater sample will be collected. Groundwater samples will be collected using a disposable or stainless steel bailer or by positive displacement pump through polypropylene tubing attached to a stainless steel ball valve. If turbid groundwater conditions are encountered, a disposable screened PVC casing may be placed within the pushprobe holes to filter out sediment, as necessary when using the tubin&W valve methodology. The PVC casing will include a 5 to 10 foot 0.010-0.020-inch slot screened interval,placed within the water bearing zone, prior to groundwater collection using the tubing and check valve. The groundwater will be decanted into laboratory supplied bottles directly from the tubing or disposable/stainless steel bai ler/s. LABORATORY ANALYSIS After collection, the soil and/or groundwater samples will be labeled, logged on a chain-of- custody form, and immediately stored in an iced cooler. The samples will be transported under chain-of-custody control to Kleinfelder's office and then transported by courier in a sealed container to a State Certified Laboratory to perform the requested analyses. A minimum of twelve soil samples(three from each of the four probes)and a possible four groundwater samples will be submitted for the following analyses. • Total Purgeable Petroleum Hydrocarbons(Gasoline Range)[TPH-G]by EPA Method 8015M • Volatile Organics by EPA Method 8260 including Benzene,Toluene,Ethylbenzene, Xylenes[BTEX]and 5 Oxygenates • Total Lead by EPA Methods Kleinfeldcr's cost estimate is also based on collection of a single groundwater sample at each boring location. Depending upon subsurface conditions, the vertical extent of contamination may not extend to groundwater. Based on this finding, a total of five groundwater samples may not need to be submitted for analyses. However,it may also become necessary to analyze additional samples at the same rates shown on the attached cost estimate. Ms. Duncan Keir will be notified of any proposed changes and if approved, the costs will be adjusted accordingly. The samples will be analyzed on a 10-day working day laboratory turnaround time (TAT), unless a more expedited laboratory turnaround is requested by the client at an additional charge. Additionally,based an Kleinfcldcr's findings, additional investigation maybe needed. Task 3.0 Reporting Upon completion of the field activities and receipt of the analytical results, a report of findings for the advancement of the push probes sampling will be vrepared for client and agency review. The report will include: • A description of the field activities, observations,and protocols • Lithologic Logs 02 W!PROP.EiVIST03PA41 December 5,2001 m 2003 Kleinfelder.Inc. F:gc 3 of 6