SWMUs 59 and 60 Biosparge System Biosparge …robinseab.org/Documents/EABTourBoards_Aug_2013.pdf ·...
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SWMUs 59 and 60 Biosparge System Biosparging involves the low flow injection (about 0.25 to 1 standard cubic foot per minute [scfm] per foot of screen) of atmospheric air to stimulate the aerobic biodegradation of hydrocarbons. Objectives • Reduce dissolved hydrocarbon concentrations to drinking water standards at SWMU 59 and SWMU 60 (Figure 1). • Reduce hydrocarbon concentrations in soil at SWMU 59. • Achieve Site Closeout at SWMU 59 and SWMU 60 by 2016. Biosparge Well Network • Air is injected via 50 vertical wells and 5 horizontal wells (Figures 2A and 2B). • Vertical wells are 40 feet deep and have 5 feet of screen. Air is injected into each well at 5 scfm and 11 pounds per square inch (psi) pressure. Air is injected for 6 hours and then the system is off for 3 hours; the on/off cycle repeats continuously. • Horizontal wells are approximately 1,200 feet long and have 540 to 850 feet of screen. The screen is positioned 50 to 70 feet below ground surface (bgs). Air is injected continuously into each well at 135 to 280 scfm and 14 psi pressure. • Horizontal wells were drilled at an angle to depth and then horizontal along the path of the well screen using special drilling equipment (Photographs 1 and 2). • Operation of biosparge system started in December 2012. Biosparge Equipment • System components are located in a fenced area about 100 feet southwest of the control tower. • Major components of the horizontal system include the following: ‒ 400-horsepower (hp) Sullair compressor capable of 2,000 scfm at 120 psi pressure ‒ After-cooler ‒ Receiver tank ‒ Manifold building • Major components of the vertical system include the following: ‒ Two 25-hp blowers/heat exchangers capable of 500 scfm and 14 psi pressure ‒ Air distribution manifold and control panel for SWMU 60 wells • Aboveground components outside the fenced area: ‒ Well vaults for horizontal wells (Photograph 3) ‒ Well vaults and air distribution manifold for SWMU 59 wells Biosparge Performance Monitoring Program • Weekly: Pressure monitoring at 10 pressure monitoring points (PMP-1 through PMP-10) along the shoulders of Taxiways B and H (Figure 3). • Monthly: Groundwater sampling at select monitoring wells to evaluate changes in dissolved oxygen and hydrocarbon concentrations. • Quarterly: Groundwater sampling at all site monitoring wells to evaluate changes in dissolved oxygen and hydrocarbon concentrations; vapor monitoring at four vapor monitoring point clusters (VMP-1 through VMP-4) (Figures 2A and 2B). How do we know the biosparge system is working? • Air distribution: Bubbling at ground surface and in monitoring wells indicates the horizontal wells are distributing air along their entire screen length and laterally up to 100 feet to either side of the well axis. • Oxygen delivery: Dissolved oxygen levels are twice the baseline (December 2012) levels. • Pressure control: The minor buildup of air pressure beneath the taxiways indicates air migration beneath the taxiways. • Evidence of biodegradation in soil: The decrease of hydrocarbon concentrations in vapor monitoring points and the presence of carbon dioxide and methane are indicative of biodegradation. • Evidence of biodegradation in groundwater: ‒ At SWMU 59, a comparison of April 2012 with July 2013 results shows contaminant of concern (COC) concentrations have decreased an average of 70 percent. ‒ Figures 4 and 5 show that the size of the benzene plume has decreased approximately 50 percent at SWMU 59 and 60 percent at SWMU 60 since operation began. The area of benzene exceeding 100 micrograms per liter has been eliminated. ‒ At SWMU 59, only 4 of the 13 performance monitoring wells currently have concentrations that exceed remediation levels (RLs). ‒ At SWMU 60, April 2012 COC levels exceeded their respective RLs in five wells; however, July 2013 COC levels exceeded their respective RLs in only two wells. Photograph 1. Drill Rig Set-up in Flightline Area Photograph 3. Completed Wellheads: HAS-60A, HAS-60B, and HAS-60C Figure 3. Pressure Monitoring Point Locations Photograph 2. Installing Well HAS-59B Interesting Facts about the Horizontal Biosparge System • 1.7 million cubic feet of air is injected per day, which is enough air to fill 8 blimps. • 2 miles of high-density polyethylene (HDPE) pipe sections were installed to convey air to the new horizontal biosparge wells. • Horizontal wells were installed using a single entry (blind end), which is a newly developed, proprietary method. • The head of the horizontal drill bit was tracked to an accuracy of less than 1 foot using radio frequency equipment. • The length of the well screens and capacity of the air compressor make this horizontal system one of the largest in the country. Figure 1. Robins AFB Map Figure 2A. SWMU 60 Site Map Figure 2B. SWMU 59 Site Map Figure 4. April 2012 Distribution of Benzene in Groundwater Pre-Biosparging Figure 5. July 2013 Distribution of Benzene in Groundwater 6 Months After Biosparge System Start-up
Transcript of SWMUs 59 and 60 Biosparge System Biosparge …robinseab.org/Documents/EABTourBoards_Aug_2013.pdf ·...
SWMUs 59 and 60 Biosparge SystemBiosparging involves the low flow injection (about 0.25 to 1 standard cubic foot per minute [scfm] per foot of screen) of atmospheric air to stimulate the aerobic biodegradation of hydrocarbons.
Objectives• Reduce dissolved hydrocarbon concentrations to drinking water standards at SWMU 59 and
SWMU 60 (Figure 1).• Reduce hydrocarbon concentrations in soil at SWMU 59.• Achieve Site Closeout at SWMU 59 and SWMU 60 by 2016.
Biosparge Well Network• Air is injected via 50 vertical wells and 5 horizontal wells (Figures 2A and 2B).• Vertical wells are 40 feet deep and have 5 feet of screen. Air is injected into each well at 5 scfm
and 11 pounds per square inch (psi) pressure. Air is injected for 6 hours and then the system is off for 3 hours; the on/off cycle repeats continuously.
• Horizontal wells are approximately 1,200 feet long and have 540 to 850 feet of screen. The screen is positioned 50 to 70 feet below ground surface (bgs). Air is injected continuously into each well at 135 to 280 scfm and 14 psi pressure.
• Horizontal wells were drilled at an angle to depth and then horizontal along the path of the well screen using special drilling equipment (Photographs 1 and 2).
• Operation of biosparge system started in December 2012.
Biosparge Equipment• System components are located in a fenced area about 100 feet southwest of the control tower. • Major components of the horizontal system include the following:
‒ 400-horsepower (hp) Sullair compressor capable of 2,000 scfm at 120 psi pressure‒ After-cooler‒ Receiver tank‒ Manifold building
• Major components of the vertical system include the following:‒ Two 25-hp blowers/heat exchangers capable of 500 scfm and 14 psi pressure‒ Air distribution manifold and control panel for SWMU 60 wells
• Aboveground components outside the fenced area: ‒ Well vaults for horizontal wells (Photograph 3)‒ Well vaults and air distribution manifold for SWMU 59 wells
Biosparge Performance Monitoring Program• Weekly: Pressure monitoring at 10 pressure monitoring points (PMP-1 through PMP-10)
along the shoulders of Taxiways B and H (Figure 3).• Monthly: Groundwater sampling at select monitoring wells to evaluate changes in
dissolved oxygen and hydrocarbon concentrations.• Quarterly: Groundwater sampling at all site monitoring wells to evaluate changes in
dissolved oxygen and hydrocarbon concentrations; vapor monitoring at four vapor monitoring point clusters (VMP-1 through VMP-4) (Figures 2A and 2B).
How do we know the biosparge system is working?• Air distribution: Bubbling at ground surface and in monitoring wells indicates the
horizontal wells are distributing air along their entire screen length and laterally up to 100 feet to either side of the well axis.
• Oxygen delivery: Dissolved oxygen levels are twice the baseline (December 2012) levels. • Pressure control: The minor buildup of air pressure beneath the taxiways indicates air
migration beneath the taxiways.• Evidence of biodegradation in soil: The decrease of hydrocarbon concentrations in vapor
monitoring points and the presence of carbon dioxide and methane are indicative of biodegradation.
• Evidence of biodegradation in groundwater: ‒ At SWMU 59, a comparison of April 2012 with July 2013 results shows contaminant of
concern (COC) concentrations have decreased an average of 70 percent.‒ Figures 4 and 5 show that the size of the benzene plume has decreased approximately
50 percent at SWMU 59 and 60 percent at SWMU 60 since operation began. The area of benzene exceeding 100 micrograms per liter has been eliminated.
‒ At SWMU 59, only 4 of the 13 performance monitoring wells currently have concentrations that exceed remediation levels (RLs).
‒ At SWMU 60, April 2012 COC levels exceeded their respective RLs in five wells; however, July 2013 COC levels exceeded their respective RLs in only two wells.
Photograph 1. Drill Rig Set-up in Flightline Area Photograph 3. Completed Wellheads:HAS-60A, HAS-60B, and HAS-60C
Figure 3. Pressure Monitoring Point Locations
Photograph 2. Installing Well HAS-59B
Interesting Facts about the Horizontal Biosparge System• 1.7 million cubic feet of air is injected per day, which is enough air to fill 8 blimps.• 2 miles of high-density polyethylene (HDPE) pipe sections were installed to convey air to the
new horizontal biosparge wells.• Horizontal wells were installed using a single entry (blind end), which is a newly developed,
proprietary method. • The head of the horizontal drill bit was tracked to an accuracy of less than 1 foot using radio
frequency equipment.• The length of the well screens and capacity of the air compressor make this horizontal
system one of the largest in the country.
Figure 1. Robins AFB Map
Figure 2A. SWMU 60 Site Map
Figure 2B. SWMU 59 Site Map
Figure 4. April 2012 Distribution of Benzene in GroundwaterPre-Biosparging
Figure 5. July 2013 Distribution of Benzene in Groundwater 6 MonthsAfter Biosparge System Start-up
78TH AIR BASE WINGANALYSIS
QRP Subcommittee sets goals based on market & prior year performance Revenue comes from QRP
Sales, DLA, and Happy Hour 2012 marks first year
revenue exceeds cost! Return on Investment jumped
from 87% in FY11 to 169% in FY12 FY13 Decrease = DLA
reduced performance and market price for scrap
COUNTERMEASURES Continue QRP Scrap Center
and recycling and increase awareness Partner with DLA-DS to
increase reimbursements for O&M scrap Perform Market surveys and
utilize bid process for scrap and batteries Subcommittee oversight
ABW OBJECTIVE: Maximize Revenue and Diversion to Offset CostsMEASURE: Meet or Exceed Annual QRP Revenue GoalsTRUE NORTH: Cost OPR: 78 CEG/CEAN AS OF: 07/2013DATA SOURCE: QRP, DLADS, Happy Hour
“The Installation of Excellence … The Place to Live, Learn, Work and Play”
FY09 FY10 FY11 FY12 FY13 Q3Proceeds Generated $161,000 $297,000 $515,039 $974,322 $474,406QRP Direct Expenses $427,073 $585,996 $588,972 $710,510 $633,095Indirect Expenses $0 $0 $0 $5,000 $0Net Proceeds 0 0 0 $263,812 0
$161,000
$297,000
$974,322
$474,406$427,073
$585,996 $588,972
$710,510$633,095
$0
$200,000
$400,000
$600,000
$800,000
$1,000,000
$1,200,000
QRP Revenue vs QRP Cost
QRP Performance
Lead DoD In Cost Management
Ass
essm
ent /
Act
ion
Plan
QRP CENTERTRANSFORMATION
QRP CENTERFUTURE CONCEPT
OPTION A
OPTION B
FUTUREPROCESSINGFACILITY
SCRAP METAL YARD
SCRAP METAL YARD
DROP OFF CENTER
DROP OFF CENTER
BEFORE
AFTER
