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will be filled with a cement grout, using direct displace- ment and/or a tremie pipe as needed, The surface will be completed using a protective box, cemented in place, with a removable cover. The well pipe will be capped with a locking cap for protection on top and a blank cap on bottom. During drilling operations, all cuttings will be described by a registered geologist. Samples will be taken every 51 , commencing at 15' below ground level, just below the current pit bottom, using a 2' split spoon sampler with 2" X 4" (or similar) brass collection tubes. The exact length of the specimens will be dependent upon the equipment of the E driller selected. The soil samples will bJ examined and described, the brass sleeves capped with foil and plastic end caps, sealed with tape, labeled, and placed in an ice chest for transportation to a certified testing laboratory. Chain-of-custody forms will be utilized for the field work and a copy of the laboratory quality assurance/quality r control manual will be supplied with the results. All borehole equipment that is reused in the boring of the three monitoring wells will be cleaned between uses with a three step wash and rinse process using TSP or a similar industrial cleaner. s At a convenient time after the wells are installed, water levels will be located using an electric probe type water s # and product level locater. The wells will be completed by bailing at least 5 casing volumes of the water column calculated to be standing in the well, using an appropriate size PVC bailer with a Teflon or similar ball and seat. When water levels have recovered about 3/4 of the previously recorded level, bailer samples will be taken for testing. All samples will be collected in sterile jars supplied by the testing lab; the samples will be placed in an ice chest for transportation to the lab. Chain-of-custody and quality ' assurance procedures will be followed as described above. The laboratory used will be instructed to supply both blanks and containers for duplicate samples if needed. The methods used for spike testing ane equipment calibration will be de sc scribed in the laboratory manual. The bailer will be washed " a as described above between uses. All samples, both soil and water, will be tested for BTEX i 3 and TPH-G. .The laboratory will be instructed to use the F minimum standards and EPA\DHS testing methods as recommended In the Tri-Regional-_Board--Staff--Report-of--10 August--1990,- --- ------ pages 17 and 18 (attached) The County EHD, and the RWQCB if necessary, will be notified of all operations in timeto witness them if desired. J.v s i„ c >Fa