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f; 4 May 1995 AGE-NC-95-0118 - - Page 2 of 4 site. Ii On 30 August 1994, three additional borings were drilled at the site to_depths.of 49 feet and completed as 2-inch ground water monitoring wells MW-1, MW-2 and MW-3. A total of 13 soil samples were analyzed for TPH as gasoline and BTE&X. Hydrocarbon odors were noted in soil samples from B-1, MW-2 and MW-3. No organic `j vapors were detected in MW-1. Laboratory analyses detected TPH as gasoliane in 6 of the 13 samples analyzed. TPH as gasoline and BTE&X were detected in all four soil samples ration of gasoline was detected in B-1 at a depth of 30 feet from B-1. The highest concent at 3,200 pprii. TPH as gasoline and BTE&X were detected in two samples from MW-3; toluene was =� detected in one sample from MW-2; and xylenes were detected in three samples from M%��- 2. No petroleum hydrocarbons,,\,ere detected in samples from MW-1,The analytical results are summarized iii Table 1. 2.4. GROUND WATER MONITORING On 2 September 1994, the ground water deptlis in all wells were measured relative to the top of the casing using a Solinst water level meter (Table 2). The groundwater gradient was calculated to be 0.0029 ft/ft diaected S 76° E. -3 .� Results of the initial gr-oundwater samples indicated that TPH as gasoline was detected in MW-1, MW-2 and MW-3 at concentrations of 280 ppb, 9,,500 ppb and 1,200 ppb, respectively. BTE&-X were detected in samples from MW-2 and MW-3 at concentrations up to 1,600 ppb (toluene, MW-2). No BTE&,X were detected in MW-1. The analytical results of all groundwater samples are summarized in Table 3. 3.0. PROCEDURES is 3.1. MONITORING WELL PURGE PROCEDURES On 16 March 1995, the water level in each well was measured relative to the top of the casing using a Solinst water level meter (Table 2). After water levels were measured, -- approximately 6 gallons of water (a nninimum of three well volumes) were evacuated frond each well using a PVC bailer. Temperature, pH and conductivity were pleasured at oare- 1 gallon intervals using ail ICM model 52200 water analyzer. Stabilization data and field logs are included in Appendix A. The purge water was stored on-site in 55-gallon drums.