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28 April 1995 AGE-NC-95-0112 ' Page 2of4 To further delineate the extent of the dissolved hydrocarbons plume the f HS/EHD required three additional wells, resulting in installation of MW-G, MW-7, and MW-8 by GeoAudit in April 1993. Two soil samples were analyzed from each pilot borings of these wells; one ' from the current and the former capillary fringe at 55 and 45 feet, respectively. No petroleuin hydrocarbons were detected in ally of the soil saillples analyzed. `Fater samples from these newly installed wells did not indicate the detection of hydrocarbons at that tinge. In order to access the soil directly beneath the former UST, boring RW-1 was installed in August 1993. This well was drilled at a 150 angle fl-oln vertical from a surface location near ' the southeast corner of the building, and completed as a 4-inch diameter remediation well. TPH-g wm as detected in soil samples at concentrations as high as 12,000 ppm at a depth of ' 35 feet. A Final Remedial Plan (FRP) was prepared by GeoAudit ill July 1994. The FRP outlined soil and ground Water remediation procedures toi• the Site. However, Implementation of the 1 FRP had been delayed because of access difficulties with the owner, of the Ilelgllborima property (the property is currently operated as an A W restaurant). 3.0. SCOPE OF WORK Qllar'tel'ly 117on1t01'lila of groundwater at the site was initiated by GeoAudit ill October 1992. Concentrations of hydrocarbons ]la\'e flllCtlllted Ill I%IW-1 and I' IW-4. Hydi-ocalboils have beeIl intermittently detected at very 1o1,,' levels ill ININV-5 and NMI-7. No hydrocai"bolls leave been detected 111 i%'11V-6 or INMI-8 slilce installation in April 1993. NNVIS i�'I�V-� alld it'I1V-3 ha�re relllailled circ' and have not been sampled since 19ST 'I'he scope of work is to further comply with the quarterly monitoring requirements. The field work for this report was performed by GeoAudit. 4.0. PROCEDURES 4.1. MONITORING l l PURGE PROCEDURES 1 . _r 011411� liiiaiy-26;-1'995,`6e aroundwater deptir-was=ineasilred -using a Solinst=Water--level._..-ID -. . �- . ._•..=-=- meter. After depth lneasul-erllents were made, PVC bailers were used to purge three well from MW-4, MW-5, MW-6, 14\V-7 alld MW-8. Because of poor recharge, three ' well volumes could not be removed from MW-1. Ground water stabilization parameters were measured at olle-gallon intervals using an ICM water analyzer. Purge water was stored in 55-gallon drums on-site. Field data sheets are included.in Appendix A.