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Overview of the First Quarter 2015
Surveillance andMaintenance Report for the LM Rocky Flats Site
January–March 2015
Quarterly Monitoring and Reporting Quarterly reports are required under the Rocky Flats Legacy Management
Agreement (RFLMA) to document that the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) remedy continues to be protective• Primary goal is surface water protection
Response action under the final remedy for Rocky Flats • Maintain two landfill covers• Maintain four groundwater treatment systems• Surface water and groundwater monitoring• Physical controls
Signage Restricted access
• Institutional controls No building construction or occupation Restrictions on excavation and soil disturbance No surface water consumption or agricultural use No groundwater wells except for monitoring Landfill covers and engineered remedy
components protection
2
Surface Water Monitoring
First Quarter 2015
Selected RFLMA Surface Water Monitoring Locations
4
Indiana StreetWalnut Creek
Woman Creek
Woman Creek
N. Walnut Creek
S. Walnut Creek
Central OU Boundary
PLFTS
Pond C-2
Pond A-4
Pond B-5
GS10
SW093
SW027
GS59 WOMPOC
WALPOC
PresentLandfill
OriginalLandfill
Performance Monitoring at Original Landfill (OLF) and Present Landfill (PLF) OLF (Woman Creek – location GS59)
• All sampling results met water quality standards during the quarter
PLF (System Effluent – location PLFSYSEFF)• Routine quarterly sampling result for vinyl
chloride was 0.23 g/L Above RFLMA standard of 0.2 g/L
Prompted increased sampling frequency (monthly) per RFLMA evaluation protocols
• Three consecutive monthly sampling results above standard (0.24 – 0.26 g/L) Prompted former PLF Pond outfall to No
Name Gulch (location NNG01) sampling
• Vinyl chloride not detected at NNG01; sampling frequency reverted to quarterly per RFLMA protocols
55
Point of Evaluation (POE) Monitoring All RFLMA POE analyte
concentrations were not reportable throughout the first quarter of calendar year (CY) 2015
66
Point of Compliance (POC) Monitoring Reportable 12-month rolling average uranium
concentrations were initially observed at WALPOC on October 31, 2014
Uranium was no longer reportable at WALPOC as of January 31, 2015
All other RFLMA POC analyte concentrations remained below reporting levels throughout the firstquarter of CY 2015
777
Questions?
88
First Quarter 2015
10
NOTE: Groundwater treatment system locations omitted for clarity
RFLMA Monitoring Light sampling quarter
• 10 Resource Conservation and Recovery Act wells (quarterly) Statistical evaluation of results will be presented in
annual report
11
Non-RFLMA Monitoring Treatment systems
• East Trenches Plume Treatment System (ETPTS): air stripper Sampled to support reconfiguration project
• Solar Ponds Plume Treatment System (SPPTS): microcell and lagoon testing
12
Treatment System Activities Mound Site Plume Treatment System (MSPTS)
• Air stripper maintenance ETPTS
• Completed reconfiguration project SPPTS
• Continued microcell tests• Continued pilot-scale lagoon tests (including sampling)
Replaced blankets with insulated covers• Maintained pumps, solar/battery power facility
13
ETPTS Reconfiguration Project Completed electrical work Completed air-stripper enclosure Activated air stripper January 16, 2015
• Collected samples to confirm treatment effectiveness Initial samples: Trichloroethene concentrations slightly above
RFLMA target• Blower motor output increased• Subsequent samples met all applicable RFLMA standards
Manufacturer cites this unit as the only fully off-grid, solar/battery air stripper known
14
15
Questions?
1616
1
10
100
1000
100001/
1/20
09
5/5/
2009
9/7/
2009
1/10
/201
0
5/15
/201
0
9/17
/201
0
1/19
/201
1
5/24
/201
1
9/26
/201
1
1/29
/201
2
6/2/
2012
10/4
/201
2
2/6/
2013
6/11
/201
3
10/1
4/20
13
2/16
/201
4
6/20
/201
4
10/2
3/20
14
2/25
/201
5
6/30
/201
5
Con
cent
ratio
n (u
g/L)
Sample Date
Influent VOCs
Effluent VOCs
Media Repl 09
Orig. AS on
New AS on
AS Inf VOCs
AS Eff VOCs
1
10
100
1000
10000
1/1/
2014
1/31
/201
4
3/2/
2014
4/1/
2014
5/1/
2014
6/1/
2014
7/1/
2014
7/31
/201
4
8/30
/201
4
9/29
/201
4
10/3
0/20
14
11/2
9/20
14
12/2
9/20
14
1/28
/201
5
2/27
/201
5
3/30
/201
5
4/29
/201
5
5/29
/201
5
6/28
/201
5
Con
cent
ratio
n (u
g/L)
Sample Date
Total VOCs Detected in ETPTS Influent vs. Effluent
Influent VOCs
Effluent VOCs
Media Repl 09
Orig. AS on
New AS on
AS Inf VOCs
AS Eff VOCs
First Quarter 2015
Site Operations
Quarterly Sign Inspections
18
RFLMA physical control All signs are in good condition
Site Operations – OLF Performed three monthly inspections – One special
inspection due to more than 10 inches of snowmelt Monitored eight settlement monuments and seven
inclinometers
191919
Site Operations – OLF (continued) Completed the project to reconfigure the East Perimeter Channel
in mid-January Observed cracking and slumping in several locations on the east
side of the OLF in March Filled cracks as feasible, based on soil conditions CDPHE and the U.S. Environmental Protection Agency inspected
the landfill on March 17, 2015 The geotechnical engineer inspected the landfill on March 19
20
Site Operations – OLF (continued)
21
22
Site Operations – PLF Performed one quarterly inspection – One special
inspection due to snowmelt of more than 10 inches
23
Questions?
2424