ARCHIVED REPORTS_XR0005335 - Laserfiche WebLink

Home Browse Search

21 February 2000 AGE-NC Project No. 95-0185 Page 7 of 8 were present in the soil at the site, however the pH of the soil sample analyzed were above ' the optimal ranges for microbial growth. The microbiological laboratory report (A. Keith Kaufman report dated 12 August 1999 [Shockey and Sons]) and chain-of-custody form are ' included in Appendix F. ' 5.0. CONCLUSIONS ' • Well MW-3 appears to be beyond the western margin of the dissolved TPH-d and TPH-g plume and monitoring well MW-2 appears to be near the southern boundary of the TPH-g plume. ' The northern and eastern margins of the dissolved TPH-d plume extend beyond monitoring well MW-1. Dissolved petroleum detected in the water samples from borings P6 and P11 were typical of motor oil (see MAI Laboratory report); while petroleum detected in the water ' sample from boring P7 was indicative of diesel(See MAI Laboratory Report-Appendix E). • Hydrocarbon-impacted soil occurs in the vicinity of the former UST area and is possibly distributed in the saturated zone, both on-site and off-site. • Biological attenuation of petroleum hydrocarbons is suggested to be occurring in soil at 25 feet bsg and in the ground near the former UST area. However, biodegrading microbes are ' not present in soil above the ground water table. 6.0. RECOMMENDATIONS Based upon data collected at the site, AGE recommends: • Preparation of a Corrective Action Plan CAP as required b the PHS-EHD for round p (CAP) 9 Y g ' water remediation at the site. The CAP should include evidence from remediation feasibility studies (e.g. ex-situ pilot tests and select bio-enumerations for natural attenuation) to determine appropriate remedial options for the site. ' Continued quarterly ground water monitoring; the next quarterly monitoring event should be scheduled immediately. • Advanced GeoEnviroamental,Inc.