ARCHIVED REPORTS_XR0011735 - Laserfiche WebLink

Home Browse Search

Appendix D Direct Push Boring Investigation Phase 11 ESA Multi-Modal Station"Six-Block Project" January 6,2003 Page 6 of 15 ➢ Two Geoprobe borings (GBK3-930-1 and GBK3-930-2) and three detection borings (DBK3-930- 1 through DBK3-930-3)were installed at 930 E Miner Avenue Geoprobe boring GBK3-930-2 was installed in the southeastern comer of the property near the location of a former UST ➢ One Geoprobe boring(GBK3-911-1) was installed inside the building at 911 E Channel Street No visual or PID indications of contamination were noted during the investigation activities at Block 3 3.3.5 Block 4 Between September 9 and September 16, 2002, ten Geoprobe borings, 16 detection borings, and four hydropunch borings were installed on three parcels of Block 4 Geoprobe, detection, and hydropunch boring locations for Block 4 is presented in Figure 9, Appendix A ➢ Four Geoprobe borings (GBK4-730-1 through GBK4-730-4), 14 detection borings (DBK4-730-1 through DBK4-730-14), and three hydropunch borings (HBK4-730-1 through HBK4-730-3)were installed at 730 E Channel Street, a former bus depot ■ Geoprobe boring GBK4-730-1, detection borings DBK4-730-1 through DBK4-730-10, and hydropunch boring HBK4-730-1 were installed in a paved parking area in the northwest comer of the property ■ Detection borings DBK4-730-11 through DBK4-730-13 were installed inside the former maintenance building ■ Geoprobe borings GBK4-730-2 through GBK4-730-4, detection boring DBK4-730-14, and hydropunch borings HBK4-730-2 and HBK4-730-3 were installed in the property's southern • paved parking area ➢ Four Geoprobe borings (GBK4-701-1 through GBK4-7014), two detection borings (DBK4-701-1 and DBK4-701-2), and one hydropunch boring (HBK4-701-1) were installed in the paved parking area at 701 E Weber Avenue ➢ Two Geoprobe borings (GBK4-729-1 and GBK4-729-2) were installed in the paved parking area at 729 E Weber Avenue, a retail tire business Field observations and PID measurements indicated that soil cores from several of the borings installed at 730 E Channel Street were impacted by contaminants ➢ Hydropunch boring HBK4-730-1 - Advanced to a total depth of 110 feet bgs to allow for sampling of deeper groundwater at this location in order to investigate the vertical extent of hydrocarbon contamination This hydropunch boring was coupled with detection boring DBK4- 730-9 ➢ Detection boring DBK4-730-14 - A slight petroleum hydrocarbon odor was noted an approximate depth of 15 feet bgs The corresponding PID measurement was 134 parts per million(ppm) ➢ Detection boring DBK4-730-4 - Slight to moderate petroleum hydrocarbon odors and moderate PID readings up to 54 8 ppm were noted in the soil samples ➢ Detection bonng DBK4-730-5 - A moderate petroleum hydrocarbon odor was noted in soil samples collected from between 15 feet and 45 feet bgs and corresponding PID readings ranged from 61 0 ppm to 591 ppm During subsequent groundwater elevation measuring activities, a petroleum odor was noted on the depth-to-water probe rc--- ➢ Detection boring DBK4-730-10 - Advanced to a total depth of 55 feet bgs, 10 feet below the deepest impacted soil Indications of contamination were noted in soil samples