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B: \WPLATEXT.DOC feet to 50 feet with blank SCH 40 F480 TrxLock PVC casing from 50 . feet to the surface. The sand envelope will be #2/16 Lapis Lustre sand and will be positioned from the 451 depth to the 70 foot depth, with 0/30 Lapis Lustre sand from the 45' depth to the 431 depth to prevent cement invasion. Cement (with less than 5% bentonite) will be used to seal the annular space from the 43 foot depth up to the the steel traffic box. The traffic box, fitted with a locking system and well ID tag, will be set in concrete , see Figure 4. The selection of filter pack and slot size for ground water monitor well construction is in using the previously installed wells . The ground water clarity from these wells and the expected similarity of lithologies to be encountered at this site are used as the basis for construction material selections . WELL DEVELOPMENT The new monitoring well will be developed by manually surging the wells over the entire length of the below water slots , with a i plunger . Ground water will then be pumped from the well until it flows clear. The waste water producted by this process will be placed in the 1000 gallon "ConVault" tank stripper for treatment. GROUND WATER SAMPLES . After the new monitor wells are developed WEGE personnel will collect ground water samples and have them analyzed at a state certified laboratory for Total Petroleum Fuel hydrocarbons as gasoline with BTEX Distinction, utilizing EPA Method 602 . i A second ground water monitoring round will follow approximately one month from the initial sampling of the wells , during the scheduled September quarterly sampling for this site. The purged ground water produced from the sampling rounds will be placed in the 1000 gallon "ConVault" for aeration treatment. Methods and Procedures Prior to sampling each well , WEGE personnel obtains two measure- ments : the depth to ground water and the product thickness using a depth to water-product interface probe . If no product is present in a given well , a ground water sample is collected using a fresh bailer. Before collecting the ground water sample, WEGE personnel purge the well . This is accomplished by removing ground water from the well until the water quality parameters (temperature, pH, and conductivity ) stabilize. Water produced by the purging process , at least four well volumes , is collected in a 55 gallon drum prior to transferring the water to the 1000 gallon "ConVault" . The well is allowed to recover after purging, and a ground water 6