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Presented to the Norwalk Tank Farm Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of KMEP On behalf of KMEP August 8, 2013

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Page 1: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

Presented to the Norwalk Tank FarmPresented to the Norwalk Tank FarmRestoration Advisory Board

On behalf of KMEPOn behalf of KMEP

August 8, 2013

Page 2: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

P t ti O iPresentation Overview KMEP UpdateUpdate

- Remediation Operations Update- Conceptual Site Model- Five ‐Year Action Plan Progress Report- Planned Activities

Revised Groundwater Monitoring and Reporting Program

Fi t S i l   M it i  U d t First Semiannual 2013 Monitoring Update

2

Page 3: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

R di ti O ti U d tRemediation Operations Update Objectives

- Contaminant Mass Containment- Contaminant Mass Removal

South‐Central and Southeast Areas- Soil Vapor Extraction (SVE) System- Groundwater Extraction (GWE) System- Total Fluids Extraction (TFE) Systemota u ds t act o ( ) Syste

Free product Groundwater

West Side Barrier- Groundwater Extraction

Discontinued August 2008  Shut‐down based on low concentrations of MTBE and 1,2‐DCA Currently monitoring TBA and other constituents

3

Page 4: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

R di ti S tRemediation Systems South‐Central Area

 TFE  ll  ( d   d  d )- 18 TFE wells (product and groundwater)- 24 onsite and 6 off‐site SVE wells (most collocated with TFE wells)- 2 GWE Wells

Southeastern Area (24‐inch Block Valve Area) Southeastern Area (24‐inch Block Valve Area)- 3 TFE wells (GMW‐O‐15, GMW‐O‐18, GMW‐36)- 3 SVE wells  (both collocated with TFE wells)- 2 GWE Wells (GMW‐SF‐9, GMW‐SF‐10)( 9 )

Treatment and Discharge- SVE Vapors

Treatment – Thermal catalytic oxidizer (catox) Discharge  Atmosphere under SCAQMD Permit Discharge – Atmosphere under SCAQMD Permit

- TFE Liquids Oil/Water Separator – Free product recycled offsite Groundwater Treatment – Liquid‐phase GAC, Fluidized Bed Bioreactors (FBBRs) 

for fuel oxygenates (MTBE  TBA  etc )for fuel oxygenates (MTBE, TBA, etc.) Groundwater Discharge – Coyote Creek under NPDES permit

4

Page 5: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

R di ti S tRemediation Systems Operations & Maintenance ActivitiesOpe at o s & a te a ce ct v t es

- Weekly Inspection and Maintenance of SVE, TFE, and TBA treatment systems

- Weekly Data Collection Vapor flow rate, vacuum, groundwater extraction rates, hours of operations, and other system parameters  of operations, and other system parameters  

- Monthly Pump Inspections- Measurement of Individual Well Vapor Concentrations- Collection and Analysis of System Influent and Effluent Vapor and Groundwater SamplesG i   f S l t R di ti  W ll- Gauging of Select Remediation Wells

5

Page 6: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

SVE S t O ti SSVE System Operations Summary

i l   l  d Equivalent Fuel Treated Based on weekly monitoring of influent vapor concentration, vapor extraction flow rate, and hours of operation.

Pounds / 6.6 lbs/gal = gallons

- 1st Quarter 2013– 1,522 gallons (10,048 pounds)d Q   88  ll  ( 8   d )- 2nd Quarter 2013– 1,488 gallons (9,824 pounds)

- Since Second Addendum – 11,712 gallons (77,304 pounds)pounds)

- Since 1995 – Approx. 464,000 gallons (3 million pounds)

6

VC2

Page 7: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

Slide 6

VC2 Not to self, update.Carino, Vladimir SCO, 6/25/2012

Page 8: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

SVE System Operations Summaryy p y500,000

ed   

Cumulative Fuel Removed by Vapor Extraction To Date

350,000

400,000

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09/15/9506/13/9605/08/9702/27/9804/07/9909/23/9903/10/0009/13/0006/14/0106/12/0202/19/0310/20/0308/09/0401/18/0508/02/0504/21/0611/14/0606/05/0711/16/0704/11/0810/01/0803/24/0909/01/0902/09/1007/20/1012/14/1004/15/1106/21/1109/06/1112/20/1102/28/1205/15/1208/07/1211/06/1201/14/1303/29/1305/21/13Notes:

Page 9: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

TFE/GWE System Operations SummaryTFE/GWE System Operations Summary Groundwater ExtractedG ou d ate t acted

- 1st Quarter 2013 South‐Central and Southeast Areas –1,771,016 gallons  West Side Barrier – none (shutdown in third quarter 2008)

- 2nd Quarter 2013 South Central and Southeast Areas 1 649 993 gallons South‐Central and Southeast Areas 1,649,993 gallons West Side Barrier – none (shutdown in third quarter 2008)

- Since 1995 South‐Central and Southeast Areas– 58 million gallons  West Side Barrier – 26.9 million gallons

8

VC4

Page 10: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

Slide 8

VC4 How did we get this number? This number was 64.4 million in the Feb. slide. With new calcs, using just the discharge number, the total is less than that.Carino, Vladimir SCO, 6/25/2012

Page 11: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

TFE/GWE System Operations SummaryTFE/GWE System Operations Summary Mass of TPH removed in Groundwater Extractedass o e oved G ou d ate t acted

- 1st Quarter 2013– 31 gallons (208 pounds)- 2nd Quarter 2013– 8 gallons (55 pounds)- Since implementing Second Addendum

378 gallons (2,498 pounds)

9

Page 12: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

TFE S t O ti STFE System Operations Summary Free Product Extractedee oduct t acted

- 1st and 2nd Quarter 2013 Free product has generally decreased since implementing the S d Add dSecond Addendum

Volume of free product recovered is small and emulsified Free product not observed to accumulate in the product p pholding tank.

- Free product not estimated for 1st and 2nd Quarter 2013Si     8   ll- Since 1995 – 8,917 gallons

10

Page 13: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

TFE System Operations SummaryTFE System Operations Summary10,00090)

Summary of Extracted Groundwater and Recovered Product

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Page 14: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

Remediation System Operations SummaryRemediation System Operations Summary SVE System

st Q t  - 1st Quarter 2013 Operated 83% of time Operated 86% of time (excluding planned shutdowns)

d Q  - 2nd Quarter 2013 Operated 73% of time Operated 90% of time (excluding planned shutdowns)

TFE/GWE System- 1st Quarter 2013Q 3

Operated 93% of time Operated 94% of time (excluding planned shutdowns)

- 2nd Quarter 2013Q 3 Operated 83% of time Operated 92% of time (excluding planned shutdowns)

12

Page 15: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

Remediation System Downtimey SVE System

Routine maintenance activities- Routine maintenance activities Drain water condensate from manifold

- Re‐wiring of system control panel- Baildown testing

TFE/GWE SystemC b   h   t- Carbon change outs

- High level alarms for transfer tank Changed bag filters, cleaned bag filter housing, backwash LGAC g g , g g,vessels

- Cleaning of OWS, EQ tank, sump and transfer tank- Baildown testingBaildown testing

13

Page 16: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

P t ti M i tPreventative Maintenance Check pump operation – monthlyCheck pump operation  monthly Pump inspection/cleaning/maintenance ‐ ongoing Bag filter replacements – twice per week minimum Inspection and minor repairs of SVE wells Backwashing of lead and polishing LGAC vessels Pre‐catalyst back pressure monitoring – Weekly  Pre‐catalyst back pressure monitoring – Weekly 

- Monitor for particulate buildup on catalyst cells Sampling between LGAC vessels – bi‐weekly 

- Monitor for breakthrough between carbon vessels; concentrations alert technicians when a change out is required

- Carbon change outs in lead or polishing LGAC vessels

14

Page 17: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

P t ti M i tPreventative Maintenance System‐specific preventative maintenance schedule for each of 

the other components of the remediation system- South‐central System- Southeastern System

Example system‐specific preventative maintenance activities- Check/inspect  valves, blowers, chemical pumps, level switches, 

hoses, and catox flame arrestor- Clean filters (various types), flow sensors, valves, transfer pumps, 

and catox catalyst- Change oil and air filters in various equipment- Check/replace belts and hoses on various equipment- Maintain pneumatic pumps- Clean oil/water separator, sump, and equalization tank- Drain and/or pressure wash holding tanks

15

Page 18: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

Pl d R di ti A ti itiPlanned Remediation Activities Continue focusing remedial efforts on South‐central and Continue focusing remedial efforts on South central and 

Southeastern areas- Continue operating TFE, GWE, and SVE systems- Continue system maintenance, inspections, and data collection on y p

weekly basis- Continue pumping onsite southeastern area extraction well GMW‐

SF‐9 to hydraulically contain TBA in that area Monitor concentrations of 1 2 DCA  MTBE  and TBA in western  Monitor concentrations of 1,2‐DCA, MTBE, and TBA in western 

area and restart WSB if necessary Replace SVE system blower – system is currently down Perform mechanical well rehabilitation of select offsite  Perform mechanical well rehabilitation of select offsite 

extraction wells Install new backwash assembly to extend life of bag filters Install air and discharge hoses and retrofit manifold piping to Install air and discharge hoses and retrofit manifold piping to 

allow TFE from GWM‐10

16

Page 19: Presented to the August - Norwalk RABnorwalkrab.com/wp-content/files/RAB Meeting Presentations KMEP/2013...Presented to the Norwalk Tank Farm Restoration Advisory Board On behalf of

C t l Sit M d lConceptual Site Model SFPP preparing integrated CSMS p epa g teg ated CS

- Addresses soil/soil vapor/groundwater/LNAPL- Will update Preliminary CSM (AMEC, February 13, 2009) with data from additional assessments

- Identify remediation objectives, goals, and performance metricsmetrics

- Provide technology screening and selection of interim remedy

- Provide implementation plan for interim remedy  CSM will be submitted to RWQCB and RAB by August 31, 2013

17

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Fi Y A ti Pl P R tFive‐Year Action Plan Progress Report Second Addendum to Remedial Action PlanSecond Addendum to Remedial Action Plan

- Submitted – November 2006- Approved – April 2007- Remediation system enhancements

Expanded the SVE and TFE system into onsite areas where residual LNAPL appeared to remainpp

- 5‐Year Schedule to Submitting Closure Request- August 2012U d t   id d i  F b      L tt  t  RAB Update provided in February 19, 2010 Letter to RAB- Revised Schedule to Submitting Closure Request- September 2013September 2013

18

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Five‐Year Action Plan Progress ReportStatus Task

Date Completed or Projected

Second RAP Addendum

Completed Receive Approval from RWQCB 7-Apr 6-Dec

Begin Remediation System Expansion 7-May --Begin Upgrades to Groundwater Treatment System 7-Aug --

Complete Remediation System Improvements 7-Dec 7-Feb

Full-Scale Remediation Startup 8-Jan --

Begin SVE Rebound Testing 8-Dec 8-Aug

S bmit First Ann al Remediation Progress Report 9 Jan 8 FebSubmit First Annual Remediation Progress Report 9-Jan 8-FebSubmit Second Annual Remediation Progress Report 10-Jan --

Complete SVE Rebound Testing As conditions allow 9-FebSubmit Third Annual Remediation Progress Report 11-Jan --Report 11 JanSubmit Fourth Annual Remediation Progress Report 12-Jan --

Submit Fifth Annual Remediation Progress Report 13-Jan --

Future Begin Bioventing OperationAfter free product

removal 9-MarBegin Bioventing Rebound Testing TBD 9-Dec

Begin Verification Groundwater MonitoringJanuary 2010

(ongoing) 10-JunCompete Bioventing Testing TBD 10-Jun

When cleanup

19

Complete Verification Groundwater Monitoring objectives are met 10-Jun

Submit Closure Request to RWQCBWhen cleanup

objectives are met 12-Aug

Install pilot biosparge test well in SE area 13-Dec --

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Pl d A ti iti 2013/2014Planned Activities 2013/2014 Preparation of Conceptual Site Model by Third Quarter 2013  Conduct planned soil vapor sampling in southern offsite area in 

August 2013Id if  b  Thi d Q    b   i    f ili   l   Identify by Third Quarter 2013 best option to facilitate clean up- Air sparging- Biosparging (vertical or horizontal)

I it   t i i- In‐situ stripping- Injection of chemicals or oxygenated water- MNA

Prepare work plan for pilot scale remediation system in Third  Prepare work plan for pilot‐scale remediation system in Third Quarter 2013

Initiate construction of pilot‐scale remediation system in Fourth Quarter 2013(to address SE area)Q 3( )

Begin pilot testing activities in First Quarter 2014

20

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Revised Groundwater Monitoring gand Reporting Program Revised Groundwater Evaluation Report, dated January 31, 2013, was prepared 

by CH2M HILL in response to a letter from the RWQCB dated November 7, 2012- Evaluated the adequacy of the current groundwater monitoring network and 

 program - Identified data gaps in evaluating the dissolved plume behavior over time- Identified redundancies or unnecessary data being collected with the current 

programSFPP E l ti  R t  d b  RWQCB  RWQCB  id d  t  t  - SFPP Evaluation Report approved by RWQCB; RWQCB provided comments to DLA Energy Evaluation Report on July 24, 2013

Revised Sampling and Analysis Plan (SAP), dated May 30, 2013, was prepared by CH2M HILL in response to a letter from the RWQCB dated March 19, 2013

P i l   f d  d t   li  i   d   ith SAP  d - Previously performed groundwater sampling in accordance with SAP prepared by Geomatrix in 1995

- Revised SAP proposes semiannual sampling for SFPP areas- Approved by the RWQCB in a letter, dated June 27, 2013

DLA E  SAP h   t t  b   b itt d b t  li  f  i   ti i t d - DLA Energy SAP has yet to be submitted but sampling frequency is anticipated to be semiannual

21

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First Semiannual 2013First Semiannual 2013Groundwater Monitoring Report Sentry Event

- January 2013 – DLA Energy- January 2013 – SFPPy 3

Semiannual Event in April- April 2013 – DLA Energy- April 2013 – SFPPp 0 3 S

Monthly Event- February 2013– SFPP- 6 Southeastern Area Wells6 Southeastern Area Wells

GMW‐36, GMW‐O‐15, GMW‐O‐16, GMW‐O‐18, GMW‐O‐19, and PZ‐5

- Monthly monitoring was discontinued in March 2013 per l b h

gapproval by the RWQCB

22

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First Semiannual 2013First Semiannual 2013Groundwater Monitoring Report Well Gauging by Blaine Tech and Parsons

- 193 wells gauged Well Sampling by Blaine Tech

- Low‐flow sampling methods  ll   l d- 101 wells sampled

- SFPP SVE and TFE/GWE systems remained on during gauging and sampling; DLA Energy SVE system gaug g a d sa p g; e gy S systeremained on but TFE/GWE system was off

23

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First Semiannual 2013First Semiannual 2013Groundwater Monitoring Report Uppermost Aquifer Groundwater Elevations and Flow

- Groundwater elevations approximately 1.3 feet lower than those reported for April 2012p p

- Groundwater elevations near historical lows since monitoring first began in 1990s

- Horizontal hydraulic gradient of 0 0023 ft/ft toward the northHorizontal hydraulic gradient of 0.0023 ft/ft toward the north Exposition Aquifer Groundwater Elevations and Flow

- Groundwater elevations were approximately 0.5 foot lower than those reported for April 2012than those reported for April 2012

- Horizontal groundwater gradient was approximately 0.0004 ft/ft toward the east‐southeast, substantially different than the uppermost groundwater zonethe uppermost groundwater zone

24

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Groundwater Elevations ‐Water Table

25

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Groundwater Elevations ‐ Exposition

26

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First Semiannual 2013First Semiannual 2013Groundwater Monitoring Report Free product measured in in 22 of the 193 wells that were gauged. 

- North‐central area: GMW‐18, GMW‐21, GMW‐35, PZ‐3, TF‐18, TF‐, , 35, 3, ,20, TF‐23, and TF‐26

- Eastern area: GW‐15 and GMW‐62- Truck Rack area: GMW‐4 and MW‐154 5- South‐central area: GMW‐10, GMW‐24, GMW‐O‐12, GMW‐O‐20, 

GMW‐O‐23,  GWR‐3, MW‐SF‐3, MW‐SF‐6, and MW‐SF‐16- Southeastern area: GMW‐36

Thicknesses ranged from 0.02 foot to 6.07 feet Measurable free product observed in these areas was greater than 

past events, likely due to a continued decline in water levels p , yacross the site.

27

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Historical Groundwater Elevations

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1993 1998 2003 2008 2013

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EXP‐1 EXP‐2 EXP‐3 EXP‐4 EXP‐5WCW‐1 WCW‐6 GMW‐O‐1 GMW‐O‐7 GMW‐O‐17GMW‐1 GMW‐39 MW‐12 PPT

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First Semiannual 2013Groundwater Monitoring Report Exposition Aquifer wells sampled:

- EXP‐1, ‐2, and ‐3 sampled twice by DLA Energy and SFPP- EXP‐4 sampled once by SFPP

EXP   l d  i  b  SFPP- EXP‐5 sampled twice by SFPP All analytical results were Non Detect (ND), except for the 

following:MTBE  was detected at EXP 3 in SFPP and DLA Energy split - MTBE  was detected at EXP‐3 in SFPP and DLA Energy split samples in January 2013, at concentrations below 1.0 ug/L near the laboratory reporting limit

- 1,‐2 DCA was detected at EXP‐3 in the DLA Energy split sample in J         i  b l     /L    h  l b  January 2013, at a concentration below 1.0 ug/L near the laboratory reporting limit

These types of low‐level detections occasionally occur in the EXP wells. SFPP and DLA Energy will continue to monitor the EXP wells. SFPP and DLA Energy will continue to monitor the EXP wells and closely watch for any future potential detections.  

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First Semiannual 2013First Semiannual 2013Groundwater Monitoring Report Uppermost Aquifer Wells

- In most areas, the lateral extents of TPH, benzene, 1‐2‐DCA, MTBE, and TBA in groundwater remain similar to those , ginterpreted during recent previous monitoring events

- TBA was detected in offsite (upgradient) monitoring well GMW‐O‐17 during April 2013. This is the first detection of 7 g p 3TBA since monitoring for TBA began in April 2009  

- Confirmation sample collected from GMW‐O‐17 on July 2, 2013 to confirm or refute the April 2013 data. Sample was 3 p 3 pnondetect for all VOCs, including TBA; therefore, it is believed that the April 2013 detection of TBA in well GMW‐O‐17 is anomalous

Concentrations are influenced by water level fluctuations

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Total Petroleum Hydrocarbons

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Benzene

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1,2‐DCA

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MTBE

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TBA

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Questions?

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