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1 k, <br />� <br />, <br />✓� �� <br />r r <br />.f r fir:' a - r � �r t� 1 C <br />„c 1' 9 <br />�r e ; <br />J. �4 <br />Tt <br />...t�....vr •..-.�+-, �..w-+.�.�1.+....� � .mow, f. _ ....1 � i _ �: <br />�., <br />plug to isolate the perforated interval from cementing <br />operation, 1%, <br />rLpper port roll of the wet l wall be cemented <br />fl --0111 the bentonite to <br />plug the surface wiL-h cenupryt q oui:, <br />using direct displacement and/ort: <br />c.erniL; pipe if <br />The monitoring wells wneeded.. <br />ill be compls_•tt;:l n;inf <br />a 1?rolLctive <br />box at Me surface, cemented in <br />place, Witt' a removable <br />cover. Tire We Lop will be capped with a locking <br />protection. cap for <br />During boring oporatiorrs, all cutting will be described .by a <br />registered geologist. ampler will be Lakoq every 5 � , comm- <br />esncirig at 5' below ground level. This will en:::ure that 'Iche <br />entire vadjsc zone, which has contained water aL any Lime in <br />recent years, will be sairiplcd �rnd ted. Sxmplc will be <br />Collected using a 2" :3plit spoon 1.tmpler with 2." A 4" (or <br />sir7il�ir) brass cc,lltCtinn tubes. Duplicate ::ampler ,,[ill be <br />Provided for EIID/RW?cll if desired. 'Che. soil ith fol sa:aples will 17e <br />with <br />foil, <br />and de^cr�ibed. The collected samples will be capped <br />wil, sealed with plastic_ end caps and duct Cape, lab- <br />eled `end placed .in an ice theca for tzansportesti <br />h -o to a cer- <br />r£asd labaralpry. Chain--vf-cus7g5tody foreUr <br />aill be Used for'-,isferal of 4amples and their temperature will be measurea <br />w'_en received at the lab. All sampling equipment will either <br />A obtained as a nackage from a certified lab or brought to <br />the site by lahuratot.y Personnel. F, copY of the laboratory <br />QA/Qc manual will be supplied with the sample result;;, <br />W All borehole equipment will he cleaned between wells and at <br />other appropriate times with a 1S <br />t ree step .rash and rinse <br />prones; using either TSP or a Similar industrial cleaner. <br />At a convenient time after the wells are installed, standing <br />water levels will be recorded using an electric probe type <br />we ter and product level recorder, both in kkia monitoring <br />WOO and the current water well. The well heads elevations, <br />at Ieast with ruspecL to each nkhor, will br• su vc}M in <br />order to establish accurate well <br />Load elevations. <br />The Weil_; will be (j,,•loperl by heti tiny at least 5 Ce15111g <br />volumes of the standing water colu;nn, using an apnropria — <br />size PVC bailer wzth a either' a Teflon or Similar ball and <br />seat. When the water level has returned to about 3/4 of its <br />staocli[lg level, bailer Sagiplu_, will be talen. The bailor <br />will b4-- cleansed as noted abnv[, between uses in each well <br />All sample:: will be collected in sterile jars ,Lnd vi i <br />supplied by tin_ tc;sting lab, Chain -of -('uric l}' fa s <br />chests etc. ens, ice <br />Zs rioted above will he Used, The laboratory will <br />Ile "sLrut2te11 to supply both Samp], b2rn�:: and 3uplicaLe <br />containers for spil_esamples if needed. The methods used for <br />spike c-.libration alld oquilti'tecrL Calibration will be <br />described in the laboratory manual. <br />All sttrnples, both sail and water, will be tested for DTE): <br />�� and TPH-G. The laboratory will be instructed to use the <br />