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I& Shawn Kellet + Page 3 December 9, 1999 The boreholes will be drilled with tm* mounted hollow stem auger m direct push drilling equipment. All drilling equipment and sampling tools will be cleaned prior to arriving, and before]raving the site. The sample devices will be advanced to the desired sampling depth interval, and a drive split spoon M mpler will be drives into undisturbed soil. The sampler will then be retrieved and dissembled,and the soil filled brass lioers;if remised for chemical analysis,win be sealed with Teflon*papa and plastic cod caps, labeled, kWed onto cbam-of-custody forms and place in a chilled ice cleat. Following soil sampling each bore bole will be prepmed for recouaaiustrce groundwater sampling using temporary 3% iuch PVC well camngc. Ile boreholes will be logged using the Umfied Soil Classification System undo the supervision of a registered geologist using the attached Geoscience protocols Wright has developed for dolling ten ng. temporary well mon,well construction and sampling Additional Who logic information will be collected to dace-be the uremrfece gmlogq. The samples will be colleted at minimum five fiw lutervals. at intervals of obvious contamination (field screened by vapor pod meas)and at shaMm*c feaures of interest. Borehole depths are anticipated to be about 15-feet deep for this reconnaissance. MgN usdwxter S '!g Each hole l be pulled using calculated well volumes based upon the depth to water is cath casing. Depth undwater measurements will be made to the nearest one-one hundredth of one foot from existing grade,a0 also checled for the lueseoee of separate phase pmdoct The Fuwuhr m sample will be cudully corrected with a clean bailer and pound mto the appmpeaw mborstory,prepared container with minimum ctvitatior. F'ch water sample will be labeled, logged onto a chain-of-cvstod_r form, and placed m a chilled ice chest for transportation to a state certified laboratory for analyses as Ind rated below. Upon completion of the borehole drilling and collection of information, the boreholes will be b wkmed with grout,placed fiom the bottom to top of the borehole. The pawed surface will be patched with quick setting concrete or asphalt,to match rusting In addition, the borehole sonographic and chemical analytical data will be revmwed to ascertain the need fiw and positioning of gnundrwrter mordsonng wells Should gmumdwatcr-monitoring weft be rewitW thea the following wen installation procedttr m would be used. 2 Cbl sl."Analysis Up to six(6)capillary fimp soil mess, ria(6)vadose woe soil samples,one(1)Wgurd sample and six(6)groundwater samples will be analyzed at a State certified analytical labonlow from the exploratory Wrings. These samples will be tested for the following. Total Petroleum Hydrocarbons as G=hw (IFHG)Diesel(MID),Benzene(B).Toluene Cr'),Ethyl-benzene(E)and Xylene M.Methyl-tert-lasyl- ether (MPBE) and fuel. Oxygenates, 1.1 Dichlomethane and Ethylene Ihbromi& using EPA Methods 351018015,9020,sad 9260.The analyses will be rim on a normal turnaround PHASE TWO Monitoring well Iesfalmtioo Three monitoring wells will be iustallod using the sox exploratory borel+eles dam to Ioctte the wells far long tam plume monitoring The wells will be rased with Schedule 40 PVC caststug, threaded together, glues will tat be used.The slatted interval will be a 0.020-inch slot and the annular space around the slob will be baddined with 212-size sand.Previous experience Las shows this to be a reliable well dugs in fine grained and stratified depositional environments. Final well design will be modified to the site- specific conditions encountered in the borehole dorm drilling Once the aquifer dram have been defined,