FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

1 23 September 2008 AGE-NC Project No.07-1537 Page 7 of 8 format (EDF) files were QA/QC checked and uploaded to the state GeoTracker database; confirmation numbers are 1739487171 and 4008800685. 3.3. ANALYTICAL RESULTS OF GRAB GROUND WATER SAMPLES A grab ground water sample was collected from soil boring B5 at a depth of 50 feet bsg(B5-GW 1 and B5-GW2 [duplicate from amber liter]). No petroleum hydrocarbon constituents were detected at or above laboratory reporting limits. Analytical results for the grab ground water sample is summarized in Table 2.The laboratory report (CTEL Project No. CT214-0804054), QA/QC reports, and chain of custody forms are included in Appendix E. Laboratory EDF files were QA/QC checked and uploaded to the state GeoTracker database; the confirmation number is 4008800685. Monitoring wells MW-7 through MW-11 were developed and sampled during the Second Quarter monitoring event on 29 April 2008.Results of the sampling event will be presented in a forthcoming, separate report entitled Ground Water Monitoring Report-Second Quarter 2008. 4.0. SUMMARY AND CONCLUSIONS Based upon the findings of this investigation,AGE concludes: • The vertical extent of petroleum hydrocarbon-impacted soil appears to be defined by soil boring B1, at approximately 55 feet bsg. The vertical extent of xylenes-impacted soil is defined in pilot soil boring MW 11 at approximately 98 feet bsg. • The vertical extent of MTBE-impacted soil is not defined. • The lateral extent of petroleum impacted soil appears to be defined northeast,east,south,and southeast of the former UST area by monitoring wells MW-4 though MW-10. The lateral extent of petroleum impacted soil also appears to be defined to the west by monitoring well MW-1, though some minor detections were reported in soil boring B5, located to the northwest of well MW-1. Advanced GeoEvironmental,Inc.