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r l, 1 17 December 1999 AGE-NC Project No 96-0235 ' Page 2 of 11 " For each sample,both ends of the leading sleeve were covered with Teflon sheets, capped and sealed i ' with tape The samples were labeled, stored on ice and transported under chain-of-custody to , McCampbell Analytical, Inc ,(MAD, a State of California Department of Health Services (DHS)- ' certified analytical laboratory A grab water sample was collected from boring B9 Prior to collection of the 25-foot soil sample, ground water was allowed to enter the augers A disposable bailer was lowered through the augers ' h into ground water for sample collection The sample was transferred into 40-m1 VOA vials - containmg�0 5 ml 18% hydrochloric acid as a sample preservative and into a one-titer amber bottle ' ; F without the preservative After collection, the sample was properly labeled, placed 1n a chilled container and transported under,chain-of-custody to MAI 1 A ' y 22 LOGGING fSoil was extruded from a second brass sleeve and screened for the'presence of organic vapor using an organic vapor meter equipped with a photo-ionization detector (PID Thermo Environmental 580A, 10 0 eV, calibrated to isobutylene), and the reading was recorded on the boring log The soil , ' was then visually described in accordance with the Unified Soil Classification System(see Appendix A - Boring Logs) PID readings are also summarized on Table 1 i 23 WELL AND BORING COMPLETION ' Boring MW-9 was completed as a ground water momtonng well using two-inch diameter PVC ' casing with 0 020-inch slotted screen installed from 45 feet to 40 feet bsg with blank casing extended to the surface The filter pack(No 2112 Lonestar sand)was installed from 45 feet to approximately ' ;38 feet bsg A'2=foot bentonite pellet plug was then installed above the filter pack and hydrated ' Boring MW-10 was completed as monitoring well MW-10 with screened casing from 30 to 10 feet " bsg The filter pack was installed from 30 to 8 feet bsg and a bentonite plug installed from 8 to 6 feet bsg ,The wells were then grouted to near the surface with portland cement' Water-tight, traffic'rated r I { , ;well,boxes were then installed over the wells � + Borings B9 through B 16 were backfilled from total depth to surface grade with portland cement The portland cement was installed in each well and boring through the hollow-stem augers The well and boring locations are shown on Figure 2 , - I ' ;I , 1 7 I 1 � 1 I t i � Advanced GeoEnvironmental,[tic i to a+ ,