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a <br /> a <br /> Fs+ <br /> u APPENDIX A <br /> t•. <br /> PROCEDURES <br /> y INVESTIGA`1`IVE <br /> ' Nell Installation ed by <br /> ,.� a and Monitoring e uip;nent,and logg <br /> E ploratory soil Borim, auger drilling q eolog'Ic <br /> hollow-stem aug stem and standard g <br /> The soil borings were drilled using Pied Soil Classihcacalnanalysis were collected at a <br /> a PAC�IC geologist using5 fob ogging and cherni iit-spoon <br /> a California modified sp The <br /> ues. Soil same 2 feet by advancing and the tip of the auger. <br /> tecqepth interval of 7-11with a 30-inch <br /> maximum, <br /> sample liners into undise using a 140--pound hammer`'`t ed with <br /> with brass um of 1S inch the brags liners, cape <br /> sampler e samples were <br /> sampler was driven a maxim cal analysis were retained�. lass jars. nate chain- <br /> les for chemi and sealed in clean g the appropriate <br /> ~' drop, Soil same plastic end caps, accompanied by after each <br /> aluminum foil and P went was steam-cleaned <br /> laced <br /> on ice and transported to�hdrill ng tequiP <br /> . % of-custody documentation. <br /> toying wells by the installation of <br /> boring- ed to groundwater coni with I. <br /> ?O-inch factory-slotted <br /> M, s were convertq0 PVC casing <br /> Selected boring -threaded Schedule alar space across the stack. eA <br /> ch diameter flus' pack was placed in the annin the ground <br /> 3-in d 12xZ0 sand p sacspack ton he gr <br /> Grade surge blocked to remove void he sandp <br /> screen- and the wells were laced from the top °f the top of each well. <br /> interval, concrete seal was P were installed on of 0 01 foot, <br /> bentonite and and protective vault ed surveyor to an accuracy <br /> surface. A locking cap a ed by a licensed <br /> dell elevations were Surveyed Y <br /> r ei a to the USGS mean sea level datum' <br /> re c <br /> + + ionizable organs <br /> drganie Vapor Analysis the field for with a 10.2 eV <br /> were analyzed in <br /> drilling hoto-ionization detector grams from an <br /> "1 Soil sar'nples collected d NU Model PI-101 P raximately the jar <br /> „ <br /> compounds using the H easuring aPP lass jar,and sealing <br /> comp procedure involves m warmed for <br /> The test p this sub-sample in a clean g The jar is <br /> lamp• placing a threaded lid. within the jar 35 <br /> ring- the head-space <br /> undisturbed soil�otmPeecured under a ierced and <br /> r_ - – — -- - <br /> then the foil-ts p ---- <br /> with aluminum 0 minutes, <br /> 4 7 approximately - <br /> September 30,199' <br /> A 1 <br /> 3 � <br /> i 310010/RLPORT? <br /> • ,. t t <br />