HomeMy WebLinkAbout05.a.3) (Handout) Update on Treatment Plant Surcharge Area Site Characterization - Part 1 – Soil InvestigationItem No. 5.a.3)
Site Characterization Study
Timothy Potter
Environmental Compliance Superintendent
October 17, 2013
Central Contra Costa Sanitary District
Site Characterization Study
Presentation Overview
• Why Conduct this Study?
• Background of Impacted Area
• Project Summary
• Preliminary Results
• Next Steps
Sa - 3)
Wandoa,)-
1
Why Conduct this Study?
• NPDES Permit Requirement
• Ammonia Removal Studies
• One of Three Required Projects /Reports
• Inform Future Decisions
• Nutrient Removal Facilities
• Options for Managing Contaminated Soils
• Fill Data Gaps
Nutrient Facility Plan
& Site Characterization
Element 1: Element 2:
Plant Optimization Nutrient Visioning Plan
(near term w /existing facilities) 1111 (long term w /new facilities)
Baffle II Total (201 HDR)
Nitrification
0 Study
II BioWin Conflauration II
Plant Optimization for II I Evaluation
Ammonia Removal
II Nitrification Rate Tests II
ICvanide Removal ODtions II
Element 3:
Site Characterization
I ontaminated soil disposal/treatment
for new facilities)
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Background of Impacted Area
• Accepted Waste Material from Shell Refinery
• 1965 -66
• Waste Material Used as Fill and to Stabilize Soil
• Waste Material Contaminated
• Organic Sludge, lead sulfate, sulfuric acid, tars
• Voluntary Environmental Investigation —1987
• Impacted Areas Identified
• Pond A, Surcharge Fill Area, Undeveloped Areas
( <1966)
• Notified Agencies
Background of Impacted Area
• Lead Agency
• Dept. of Toxic Substances Control
• Studies Performed 1989 - 2002
• Preliminary Endangerment Assessment
• Remedial Investigation /Feasibility Study
• Field Investigation Report
• Baseline Human Health Risk Assessment
• Final Removal Action Work Plan
• Soil /Groundwater Contamination Data
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Background of Impacted Area
DTSC Oversight
• Voluntary Cleanup Agreement —1995
• Consolidation to Pond A and Surcharge Fill
Area
• Twelve Inch Soil Cap Installed — 2003
• Pond A and Surcharge Fill Area
• Enforceable Agreement — 2004
• No Groundwater Migration of Pollutants —
2007
• Wells Abandoned - 2008
Project Summary
Objectives
• Limited to Surcharge Fill Area
• Define Extent of Waste Material Present
• Vertical and Lateral Level of Contamination
• Preliminary Profiling
• Waste Management Options if Excavate
• Identify Data Gaps
• Use Historic Studies
• Soil Contamination
• Geotechnical Borings
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4
CS.1 3 -I
s
I'm
Imhoff Dr,ikve
IF
- / PW �-
/ CS13 EB02k
CS1' -1=81 •
CS1`� -E614
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CEB11 CS13 -EB12 (28') �CS13 -ES13
Q2234" X
2W--
S13.EB16 CS13 -E]317 (25') CS13 -E
/ " M
Surcharge Fill Area
. CS13 -EB20
CS13 EB19 CS13 -El
CS13 -EB21
'r
.
Holdings BN
"A" South
513 -E 2 4 • CS13 -EB25 • CS13 -EB26 • CS13- t'.02-
�° � Aeration Tanks' { '
1:S13 -E629 (5') 6CS13 EB30,(22,')
t 1 3- ® 2A • CS13 -EB3
999 7 s CS13 -E828 (10')
r
♦, _ _ ti �- CS13 -EB33 (15')
r �� �`' js► S13 -E632 ® • CS13 -EB3\
t%kaam IMMW OEM
S13 -ES36 ~'
i
4 }" CS13 -EB37 CS13-EB38 CS13 -EB39 (15,)
O
' a
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v4jSouth Clarifiers ( �,
_ :r1 _
10'
,• CS13�EB45 CS13 -EB46 CS'3••EP C� -EB48
t
:1 I
Notes: ^'
- The thickness represents a conservative measure
of bottom of waste. Intermittent lenses where waste
was not observed are Included in the total thickness
bgs = below ground surface t
ft = feet
Image Source Google Earth, 29 November 2011
Legend ® Potential Cal Haz Waste Thickness of Waste and Depth to Bottom of Waste
(sample depth ft bgs) Site Boundaries (Acreages)
12= Depth (f Bottom of Boring Location Capped Property 23.1) CCCSD
Waste (ft bgs) ® pp p � (
Ground Holding Basin "A" South (15.1) arts Imhoff Place
Thickness of Waste (ft) Surface At Martinez, California
OCharacterization Study Area (10.4)
5- 5 ® Uncapped Area (3.8)
10 - 15 Thickness Geosyntec Figure
15-20 of Waste
20-25 Depth to Bottom consultants
25-30 of Waste ° 5 eet I WR1692 October 2013 1
P r. IS\ CCCSD% prolecl12013invReport%PreliminaryFgs \Fig_ 1 _ WasteThlcknessDepthToBot_ mxd
V,
K.
,
I m h ofwf D r`iV6' VKAI�'l
_CS13 EB07
CS13 -EBOS ,' CS13 -EB02�
13 -EBO CS13 -EB01
` \CS13 -EB06 n/ 0313 -EB08 �
- ti
- 'CS13 -EB11 CS13.E612 (2`), i•�y`�y CS13 -EB,13
_ ---- -- -- -Q!"---------- - --- -- j
-21 -- - - -- _ --- - - - - --
CS13- EB17'(7) - . -
,'- CS13 -EB16 6S�13• ;E81$
CS13 -EB14
RWR
s 1W f
-W
Ia
Aerat�onTanks `
t .•.4
PM
mom,.
i
3
Notes: /
Elevation of bottom of waste based on
visual observation, field screening, and
analytical data. Elevation calculated using
depth of sample boring and ground surface
elevation from most recent topographic survey .
ft msl = feet above mean sea level
Image Source: Google Earth, 29 November 2011
Legend
-- -$'- -- Elevation of Bottom of Waste (ft msl)
Elevation of Bottom of Waste (ft msit
10 -14
8 -10
6 -8
4 -6
2 -4
0 -2
-2 -0
-5--2
a -
Surcharge Fill Area
s -
,% • CS13 -EB20 ; ,� --
� v ,''• E%13-EB21
CS13 -EB19t ' ' ',` �•
CS13 -EB22 (195)
Holding Basin
`�.
"A "South-
CS13 -EB24 CS13 -EB25 i CS13 -EB26 i CS13 -EB27
� I I
� , 1
� i I
i CS13 -EB29 (27) CS13 -EB30 (9')
CS13 -EB28 (121 ® , • CS13 -EB31
� 1 1
\ , 1
1 %
1
� � 1
� 1
i '� '1 CS13 -E!335 ,
?
�'� CS13 -EB33 (12'),
t CS13 -EB32 i ® ', CS13 EB34
CS13 -EB36
i
1~ CS13 =EB37 CS13 -EB38 CS13 -EI339 (7 j
\
S --
'� CS13
ti
[`
'CS13 -E644 _
C813- EB411` GS93-EB42 ^.>CS13 =EB43s 1 1 i.-
I
f . ` �rF • k7��y� ' i
, , Z
Nil
'CS13 -EB48
!EB45 CS13 =EB46 CS13 -EB47 `��
0 Potential Cal Haz Waste (ft msl)
• Boring Location
Site Boundaries (Acreages)
Q Capped Property (23.1)
Holding Basin "A" South (15.1)
Characterization Study Area (10.4)
® Uncapped Area (3.8)
P t GIS% CCCSDVrgect\ 2013invReport\ PrelimmaryF igsiFlg_2_tlevvvasteeot mxa
Elevation of Bottom of Waste
CCCSD
5019 Imhoff Place
Martinez, California
Geosyntec ° Figure
0 80 Consultants
Feet WR1692 October 2013 2
Project Summary
Project Elements
• Work Plan (DTSC Approval)
• Subsurface Investigation
• Direct Push Soil Coring /Sampling (48)
• Cone Penetration Testing (7)
• Mud Rotary Drilling (3)
• Field Screening Methods
• Photoionization Detector (VOCs)
• X -Ray Fluorescence (Metals)
• Field pH Meter
• Sampling and Analysis (minimum 2 /boring)
Next Steps
• Three Site Characterization Study Reports
• Study Completion Report to DTSC
• Alternative Remediation /Disposal Options
• Geotechnical Report
• Board Presentation on 11/21/13
• Submit Report to RWQCB by 2/28/14
• Ammonia Removal Optimization Study
• Alternative Ammonia (Nutrient) Removal
Technologies
• Site Characterization Study
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Questions or Comments?
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