ARCHIVED REPORTS_XR0009048 - Laserfiche WebLink

Home Browse Search

r Rtpona Market Quarterly Groundwater Sampling Report July 2001 Page: 2 SUMMARY FINDINGS Groundwater was present as an unconfined state at a depth of approximately 24 feet below ground surface at the Ripona Marklet site on July 16, 2001 The unconfined water table was present approximately 3 feet #irY than in the July 2000 monitoring event Groundwater flow direction is N 41 E direction with a gradient of 0 02 ft/ft The potenhometric surface and groundwater flow direction are shown on Figure 2 Site Map / Groundwater Flow This is a shift in groundwater flow and gradient from N 80 E / 009 measured in July 2000 Groundwater Elevations 7-16-01 Well Collar Elevation DTVII GW Elevation MW-1 6958 2433 4525 MW-2 7001 2398 4603 MW-3 70 24 57 4543 Laboratory analysis were reported 0 08 to 0 15 mg/l for gasoline and 2 8 to 1 1 ug/1 • benzene, 9 9 to 6 4 ug/l Toluene, 2 7 to 2 0 ug/l ethyl benzene, 12 to 9 6 ug/1 xylenes Fuel oxygenates were detected at 3000 to 8 6 ug/1 MTBE, 750 ug/1 t-butanol, and 4 6 ug/l Tame No other oxygenates were detected The dissolved oxygen and Nitrate concentrations shows a marked slight decrease (8 6 to 4 2 / 4 3 Oxygen — 6 8 to 2 9 / 2 2 nitrate) in the source area, which indicates biologic activity using both oxygen and titrate for, contarrunate biodegradation The biologic activity suggests that active contaminate reduction is taking place Laborato Groundwater Sample Results Petroleum Com ounds 07-16-2001 Sam le I D Gasoline I Benzene I Toluene I E-Benzene I X�lenes j MTBE I t-Butanol I TAME MW-1 008 1 1 64— 20 96 100 <20 <10 MW-2 015 13 57 20 96 3000 750 46 MW-3 009 28 99 27 12 86 <20 <10 ND=Non Detect NA=Not Analyzed Mg/L for gasoline µg/1.,for BTEX,MTBE, and 8260 Oxygenated Compounds Laboratoa Groundwater Sample Results Inorganic Compounds 07-16-2001) Sam le 1 D O-,(mg/L) I Nitrate(mg/L) I Iron(mg/L) LSulfate(mg/L) MW-1 86 6 8 <0 1 44 MW-2 43 2 9 <0 1 46 MW-3 42 1 2 2 <0 1 38