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Kennedy/Jenks/Chikon labeling, each liner will be placed in individual plastic bags and stored in a cooled ice chest for transport to Kennedy/Jenks/Chilton' s Laboratory Division for analysis. A chain-of-custody form will be filled out concurrently with the collection of soil samples and included in the ice chests for shipping. Laboratory analyses of soil samples are described in Task 5. The drilling and sampling equipment will be steam cleaned prior to installing each boring, and the soil sampling equipment will be cleaned between samples to reduce the likelihood of cross-contamination between borings and samples. Cuttings generated during drilling of the wells will be placed in DOT approved steel drums and labeled as to contents, date of fill and source. Analytical information from soil samples collected during drilling will be provided to Cal-Farm Supply when available for its use in determining proper waste dis- posal methods. Soil from a second brass liner at each drive interval will be placed in a glass container sealed with a tight fitting lid. After placing the container in a warm area for 10 to 15 minutes to promote volatization, the lid will be removed and the probe of an organic vapor analyzer quickly inserted. A mea- surement of organic vapors present in container headspace will be recorded. Following completion of each of the four monitoring well borings, 2-inch dia- meter, cleaned PVC well casing will be installed. The lower portion of the monitoring well will consist of a factory machine slotted (0.020-inch slats) Schedule 40 PVC casing, the screened interval of which will extend to approxi- mately 5-to 10-feet below and 5-feet above the groundwater table observed at the time of well installation. This arrangement will accommodate seasonal water level fluctuations. The upper portion of the casing will consist of blank (non-slotted) , Schedule 40 PVC casing. Casing joints will consist of the threaded connections; PVC cement or lubricants will not be used on casing joints. The well will be completed above ground with a locking, steel con- ductor casing. The PVC casing will extend approximately one foot above the ground surface and the steel outer container will extend approximately 1-foot below ground and 2-feet above ground. The annular space between the screened section and the wall of the boring will be filled with an artificial filter pack consisting of Monterey No. 3 Sand. A 1-foot thick bentonite pellet seal will be placed above the filter pack and hydrated with potable water. A cement/bentonite grout consisting of approxi- mately 2 pounds of bentonite, approximately 7 gallons of potable water, added to 94 pounds of cement (1 sack) will be emplaced on top of the bentonite pellet seal . The artificial filter pack sand, bentonite seal , and cement/ bentonite grout will be installed as the auger is withdrawn from the boring to stabilize the boring walls. Monitoring wells will be developed by bailing and/or pumping to clean the well and to stabilize soils around the screen. Well development will continue until water is visibly clear or a minimum of five well casing volumes of water have been removed. Well development water will be placed in DOT approved drums labeled with the date and contents and left onsite for disposal by Cal- 3