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k4 KLEINFELDER completed dewatering wells (DW-48, DW-50, DW-51, DW-52, DW-54, DW-55 and DW-56) Two soil samples were collected at a depth of approximately 10 feet below ground surface (bgs) ' from two incomplete dewatering wells (DW-57 and DW-58) These two wells were not completed because soil discoloration and petroleum-like odors were noted from the contractors installing the wells The grab groundwater samples were collected using single-use disposable polypropylene bailers ' and new string and as generally described in Attachment A The water was decanted directly into laboratory supplied pre-cleaned bottles ' The two soil samples were collected by advancing a stainless steel hand auger Soil samples were obtained by slide hainmering a 2-inch diameter by 6-inch long stainless steel tube into the soil at the desired sampling depths The stainless steel tube was then removed from the ' dewatering boring and sealed with Teflon® sheeting and tight-fitting plastic end caps The soil and groundwater samples were immediately stored in an iced cooler The samples were transported under chain-of-custody control to Kleinfelder's office and then transported by ' couner in a sealed container to a state certified laboratory for the requested analyses The stainless steel hand auger was decontaminated between sample locations with a Liquinox® (laboratory-grade detergent) and potable water wash and a distilled water rinse New stainless steel tubes used for sample collection were also decontaminated using the same methodology Three of the grab groundwater samples and the two soil samples were collected on April 3, 2003 and the remaining four groundwater samples were collected on May 2, 2003 The seven grab groundwater samples and the two soil samples were submitted to Alpha Analytical, Inc of ' Sparks,Nevada, a State of California certified laboratory for the following analyses • Total Purgeable Petroleum Hydrocarbons (Gasoline Range) [TPH-G] by EPA Method 8015M/DHS LUFTI 0 Benzene, Toluene, Ethylbenzene, Xylenes [BTEX] by EPA Method 8015B/8260B • Total Lead by EPA Methods ' • Volatile Organics, including 5 oxygenates (MTBE, DIPE, ETBE, TAME and TBA) by EPA Method 8260B ' These soil and groundwater samples were analyzed on a rush 24 to 48 hour turnaround time (TAT) t ' 28699 E01 /ST03it759 Page 4 of 17 Copyright 2403,Kleinfelder, Inc May 20,2003