Iowa DNR Risk Based Corrective Action

Risk Based Corrective Action

Soil Gas Data

8LTM35

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Well or Vapor Sample ID Label	Sample Date	X (ft)	Y (ft)	B (µg/m3)	T (µg/m3)	Pathway	Chemicals Of Concern	Purpose of Well or Sample	Receptor Types	Name of Source or Receptor	Ground Level Elevation (ft)	Top of Casing Elevation (ft)	Top of Screen Elevation (ft)	Soil Gas Sample Elevation (ft)	Static Groundwater Elevation (ft)

GV-3	12/05/2000	124	58	<96,000	<96,000	GW	B	Source		GW Source	1000.03	999.95	993.03	994.03	992.00
GV-3	12/19/2000	124	58	<101,000	<101,000	GW	B	Source		GW Source	1000.03	999.95	993.03	994.03	992.00
SG4	12/05/2000	101	39	<96,000	<96,000	S	B	Source		Soil Source	1000.03	999.95	993.03	994.03	992.00
SG4	12/19/2000	101	39	<101,000	<101,000	S	B	Source		Soil Source	1000.03	999.95	993.03	994.03	992.00
SVP-16	08/13/2003	106	39	255,000	129,000	S	B	Source		Soil Source	999.93	999.48	992.48	991.98	991.59

Sampling Methods

Date	Methods
08/13/2003	SVP-16 was installed using a trailer-mounted drill rig and a 3-inch split spoon auger. The well was placed within five feet of the soil sources, MW-16 and GP-2. The boring was completed to a depth of approximately 8 feet below ground surface, and the was completed using one foot of slotted 1-inch PVC and seven feet of 1-inch PVC riser. The boring was completed at 0740 on 08/13/2003. The well was allowed to stabilize for approximately five hours before sampling. To sample the well, a soil gas pump was obtained from Test America - Cedar Falls, along with approximately 15 feet of sampling tube. The charcoal sample tube was placed approximately six inches from the bottom of the well. After the top of the well was capped off from the atmosphere, a sample was collected by running the soil gas pump for four minutes. The sample was collected at 1254 on 08/13/2003. The soil gas sample was submitted to Test America - Nashville, under chain of custody, for analysis following NIOSH 1501. Soil gas sample results were reported by Test America in micrograms per tube. To convert the results to micrograms per cubic meter, the following conversions were used: 1 soil gas tube = 200mL or 0.2L 1,000L = 1 cubic meter In order to report results in micrograms per cubic meter, a multiplier of 5,000 was used to convert 0.2L to 1,000L, or 1 cubic meter. The concentrations for benzene and toluene were also multiplied by 5,000, thereby deriving the acceptable unit form for soil gas data. SVP-16 was installed using a trailer-mounted drill rig and a 3-inch split spoon auger. The well was placed within five feet of the soil sources, MW-16 and GP-2. The boring was completed to a depth of approximately 8 feet below ground surface, and the was completed using one foot of slotted 1-inch PVC and seven feet of 1-inch PVC riser. The boring was completed at 0740 on 08/13/2003. The well was allowed to stabilize for approximately five hours before sampling. To sample the well, a soil gas pump was obtained from Test America - Cedar Falls, along with approximately 15 feet of sampling tube. The charcoal sample tube was placed approximately six inches from the bottom of the well. After the top of the well was capped off from the atmosphere, a sample was collected by running the soil gas pump for four minutes. The sample was collected at 1254 on 08/13/2003. The soil gas sample was submitted to Test America - Nashville, under chain of custody, for analysis following NIOSH 1501. Soil gas sample results were reported by Test America in micrograms per tube. To convert the results to micrograms per cubic meter, the following conversions were used: 1 soil gas tube = 200mL or 0.2L 1,000L = 1 cubic meter In order to report results in micrograms per cubic meter, a multiplier of 5,000 was used to convert 0.2L to 1,000L, or 1 cubic meter. The concentrations for benzene and toluene were also multiplied by 5,000, thereby deriving the acceptable unit form for soil gas data.
08/13/2003	SVP-16 was installed using a trailer-mounted drill rig and a 3-inch split spoon auger. The well was placed within five feet of the soil sources, MW-16 and GP-2. The boring was completed to a depth of approximately 8 feet below ground surface, and the was completed using one foot of slotted 1-inch PVC and seven feet of 1-inch PVC riser. The boring was completed at 0740 on 08/13/2003. The well was allowed to stabilize for approximately five hours before sampling. To sample the well, a soil gas pump was obtained from Test America - Cedar Falls, along with approximately 15 feet of sampling tube. The charcoal sample tube was placed approximately six inches from the bottom of the well. After the top of the well was capped off from the atmosphere, a sample was collected by running the soil gas pump for four minutes. The sample was collected at 1254 on 08/13/2003. The soil gas sample was submitted to Test America - Nashville, under chain of custody, for analysis following NIOSH 1501. Soil gas sample results were reported by Test America in micrograms per tube. To convert the results to micrograms per cubic meter, the following conversions were used: 1 soil gas tube = 200mL or 0.2L 1,000L = 1 cubic meter In order to report results in micrograms per cubic meter, a multiplier of 5,000 was used to convert 0.2L to 1,000L, or 1 cubic meter. The concentrations for benzene and toluene were also multiplied by 5,000, thereby deriving the acceptable unit form for soil gas data. SVP-16 was installed using a trailer-mounted drill rig and a 3-inch split spoon auger. The well was placed within five feet of the soil sources, MW-16 and GP-2. The boring was completed to a depth of approximately 8 feet below ground surface, and the was completed using one foot of slotted 1-inch PVC and seven feet of 1-inch PVC riser. The boring was completed at 0740 on 08/13/2003. The well was allowed to stabilize for approximately five hours before sampling. To sample the well, a soil gas pump was obtained from Test America - Cedar Falls, along with approximately 15 feet of sampling tube. The charcoal sample tube was placed approximately six inches from the bottom of the well. After the top of the well was capped off from the atmosphere, a sample was collected by running the soil gas pump for four minutes. The sample was collected at 1254 on 08/13/2003. The soil gas sample was submitted to Test America - Nashville, under chain of custody, for analysis following NIOSH 1501. Soil gas sample results were reported by Test America in micrograms per tube. To convert the results to micrograms per cubic meter, the following conversions were used: 1 soil gas tube = 200mL or 0.2L 1,000L = 1 cubic meter In order to report results in micrograms per cubic meter, a multiplier of 5,000 was used to convert 0.2L to 1,000L, or 1 cubic meter. The concentrations for benzene and toluene were also multiplied by 5,000, thereby deriving the acceptable unit form for soil gas data.
08/13/2003	SVP-16 was installed using a trailer-mounted drill rig and a 3-inch split spoon auger. The well was placed within five feet of the soil sources, MW-16 and GP-2. The boring was completed to a depth of approximately 8 feet below ground surface, and the was completed using one foot of slotted 1-inch PVC and seven feet of 1-inch PVC riser. The boring was completed at 0740 on 08/13/2003. The well was allowed to stabilize for approximately five hours before sampling. To sample the well, a soil gas pump was obtained from Test America - Cedar Falls, along with approximately 15 feet of sampling tube. The charcoal sample tube was placed approximately six inches from the bottom of the well. After the top of the well was capped off from the atmosphere, a sample was collected by running the soil gas pump for four minutes. The sample was collected at 1254 on 08/13/2003. The soil gas sample was submitted to Test America - Nashville, under chain of custody, for analysis following NIOSH 1501. Soil gas sample results were reported by Test America in micrograms per tube. To convert the results to micrograms per cubic meter, the following conversions were used: 1 soil gas tube = 200mL or 0.2L 1,000L = 1 cubic meter In order to report results in micrograms per cubic meter, a multiplier of 5,000 was used to convert 0.2L to 1,000L, or 1 cubic meter. The concentrations for benzene and toluene were also multiplied by 5,000, thereby deriving the acceptable unit form for soil gas data. SVP-16 was installed using a trailer-mounted drill rig and a 3-inch split spoon auger. The well was placed within five feet of the soil sources, MW-16 and GP-2. The boring was completed to a depth of approximately 8 feet below ground surface, and the was completed using one foot of slotted 1-inch PVC and seven feet of 1-inch PVC riser. The boring was completed at 0740 on 08/13/2003. The well was allowed to stabilize for approximately five hours before sampling. To sample the well, a soil gas pump was obtained from Test America - Cedar Falls, along with approximately 15 feet of sampling tube. The charcoal sample tube was placed approximately six inches from the bottom of the well. After the top of the well was capped off from the atmosphere, a sample was collected by running the soil gas pump for four minutes. The sample was collected at 1254 on 08/13/2003. The soil gas sample was submitted to Test America - Nashville, under chain of custody, for analysis following NIOSH 1501. Soil gas sample results were reported by Test America in micrograms per tube. To convert the results to micrograms per cubic meter, the following conversions were used: 1 soil gas tube = 200mL or 0.2L 1,000L = 1 cubic meter In order to report results in micrograms per cubic meter, a multiplier of 5,000 was used to convert 0.2L to 1,000L, or 1 cubic meter. The concentrations for benzene and toluene were also multiplied by 5,000, thereby deriving the acceptable unit form for soil gas data.
08/13/2003	SVP-16 was installed using a trailer-mounted drill rig and a 3-inch split spoon auger. The well was placed within five feet of the soil sources, MW-16 and GP-2. The boring was completed to a depth of approximately 8 feet below ground surface, and the was completed using one foot of slotted 1-inch PVC and seven feet of 1-inch PVC riser. The boring was completed at 0740 on 08/13/2003. The well was allowed to stabilize for approximately five hours before sampling. To sample the well, a soil gas pump was obtained from Test America - Cedar Falls, along with approximately 15 feet of sampling tube. The charcoal sample tube was placed approximately six inches from the bottom of the well. After the top of the well was capped off from the atmosphere, a sample was collected by running the soil gas pump for four minutes. The sample was collected at 1254 on 08/13/2003. The soil gas sample was submitted to Test America - Nashville, under chain of custody, for analysis following NIOSH 1501. Soil gas sample results were reported by Test America in micrograms per tube. To convert the results to micrograms per cubic meter, the following conversions were used: 1 soil gas tube = 200mL or 0.2L 1,000L = 1 cubic meter In order to report results in micrograms per cubic meter, a multiplier of 5,000 was used to convert 0.2L to 1,000L, or 1 cubic meter. The concentrations for benzene and toluene were also multiplied by 5,000, thereby deriving the acceptable unit form for soil gas data. SVP-16 was installed using a trailer-mounted drill rig and a 3-inch split spoon auger. The well was placed within five feet of the soil sources, MW-16 and GP-2. The boring was completed to a depth of approximately 8 feet below ground surface, and the was completed using one foot of slotted 1-inch PVC and seven feet of 1-inch PVC riser. The boring was completed at 0740 on 08/13/2003. The well was allowed to stabilize for approximately five hours before sampling. To sample the well, a soil gas pump was obtained from Test America - Cedar Falls, along with approximately 15 feet of sampling tube. The charcoal sample tube was placed approximately six inches from the bottom of the well. After the top of the well was capped off from the atmosphere, a sample was collected by running the soil gas pump for four minutes. The sample was collected at 1254 on 08/13/2003. The soil gas sample was submitted to Test America - Nashville, under chain of custody, for analysis following NIOSH 1501. Soil gas sample results were reported by Test America in micrograms per tube. To convert the results to micrograms per cubic meter, the following conversions were used: 1 soil gas tube = 200mL or 0.2L 1,000L = 1 cubic meter In order to report results in micrograms per cubic meter, a multiplier of 5,000 was used to convert 0.2L to 1,000L, or 1 cubic meter. The concentrations for benzene and toluene were also multiplied by 5,000, thereby deriving the acceptable unit form for soil gas data.

Sampling Justification

Date	Trip Blank < MDL?	Justification
08/13/2003	No	SVP-16 was completed as a replacement soil gas well for SG4 (SV4). Soil gas well SG4 was deemed unusable due to damage sustained from vehicular traffic and would have provided samples that would be compromised due to contact with ambient air. SVP-16 was installed within five feet of the soil source locations at MW-16 and GP-2. SVP-16 was completed as a replacement soil gas well for SG4 (SV4). Soil gas well SG4 was deemed unusable due to damage sustained from vehicular traffic and would have provided samples that would be compromised due to contact with ambient air. SVP-16 was installed within five feet of the soil source locations at MW-16 and GP-2.
08/13/2003	No	SVP-16 was completed as a replacement soil gas well for SG4 (SV4). Soil gas well SG4 was deemed unusable due to damage sustained from vehicular traffic and would have provided samples that would be compromised due to contact with ambient air. SVP-16 was installed within five feet of the soil source locations at MW-16 and GP-2. SVP-16 was completed as a replacement soil gas well for SG4 (SV4). Soil gas well SG4 was deemed unusable due to damage sustained from vehicular traffic and would have provided samples that would be compromised due to contact with ambient air. SVP-16 was installed within five feet of the soil source locations at MW-16 and GP-2.
08/13/2003	No	SVP-16 was completed as a replacement soil gas well for SG4 (SV4). Soil gas well SG4 was deemed unusable due to damage sustained from vehicular traffic and would have provided samples that would be compromised due to contact with ambient air. SVP-16 was installed within five feet of the soil source locations at MW-16 and GP-2. SVP-16 was completed as a replacement soil gas well for SG4 (SV4). Soil gas well SG4 was deemed unusable due to damage sustained from vehicular traffic and would have provided samples that would be compromised due to contact with ambient air. SVP-16 was installed within five feet of the soil source locations at MW-16 and GP-2.
08/13/2003	No	SVP-16 was completed as a replacement soil gas well for SG4 (SV4). Soil gas well SG4 was deemed unusable due to damage sustained from vehicular traffic and would have provided samples that would be compromised due to contact with ambient air. SVP-16 was installed within five feet of the soil source locations at MW-16 and GP-2. SVP-16 was completed as a replacement soil gas well for SG4 (SV4). Soil gas well SG4 was deemed unusable due to damage sustained from vehicular traffic and would have provided samples that would be compromised due to contact with ambient air. SVP-16 was installed within five feet of the soil source locations at MW-16 and GP-2.