Amendment 0002_Section J_Att 5 Seed Project PWS_Technical Exhibit 3 update.PDF

PDF 11 MB Posted Apr 10, 2020

Attached to: Multiple Award Task Order Contract (MATOC) Indefinite Delivery/Indefinite Quantity (IDIQ) for Environmental Services Activities at Various Locations within the U. S. Army Corps of Engineers (USACE) Honolulu District (POH) Area of Responsibility (AOR)
Solicitation number: W9128A20R0008
Issued by: Department of the Army Corps of Engineers Engineering District Honolulu

About this file

Written by GovTribe AI · Dec 29, 2023

This document includes technical exhibits summarizing soil and groundwater contamination data from a former fuel storage facility in American Samoa. The exhibits provide details on the extent of contamination at each of the 12 former above-ground storage tank locations, including maps showing approximate areas of contamination exceeding screening levels. Supporting data tables provide the average depth to groundwater, observed depth range of contamination, approximate area of contaminated soil, and remaining tank metal at each tank site. Monitoring well locations and groundwater elevation data are also included. The purpose of this document is to characterize the environmental conditions to support cleanup and remediation activities at the former fuel storage facility located on the island of Tutuila in American Samoa.

The related federal contract opportunity is a solicitation for a Multiple Award Task Order Contract for environmental services activities within the U.S. Army Corps of Engineers Honolulu District area of responsibility. The solicitation seeks contractors to provide environmental services on an as-needed basis, with task orders to be competed among awardees. Technical questions regarding this solicitation are due no later than 15 calendar days prior to the proposal due date. The solicitation was released by the Department of the Army Corps of Engineers Engineering District Honolulu.

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Other files

File	Type	Posted
Amendment 0003_Section J_Attachment 6 - PPQ Form.pdf	PDF	Apr 15, 2020
W9128A20R0008 Amendment 0003_15Apr2020.pdf	PDF	Apr 15, 2020
Amendment 0003_Section J_Attachment 7 - ProjNet RFIs for W9128A20R0008.pdf	PDF	Apr 15, 2020
W9128A20R0008 Amendment 0002_09Apr2020.pdf	PDF	Apr 10, 2020
Amendment 0002_Section J_Att 5 Seed Project PWS_Technical Exhibit 5.pdf	PDF	Apr 10, 2020
Amendment 0001_W9128A20R0008_02Apr2020.pdf	PDF	Apr 2, 2020
Amendment 0001_Section J_Attachment 5_Technical Exhibit 4.pdf	PDF	Apr 2, 2020
Amendment 0001_Section J_Attachment 6 - Aua Site Visit Documentation.pdf	PDF	Apr 2, 2020
A.2.11.3 RFP W9128A20R0008 rev23March20.pdf	PDF	Mar 23, 2020

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Aua Fuel Farm Site

Monitoring Well Locations

Tank Site Details

Assumed Excavation Quantities

U.S. Army Corps of Engineers – Honolulu District

Technical Exhibit 3

Updated 6 April 2020

MW-3

1.84

MW-2

2.09

MW-1

1.41

MW-5

2.70

MW-6

4.69

MW-4*

1.31

MW-7

3.52

MW-8

2.65

MW-9

15.67

MW-12

20.86

MW-10

11.30

MW-13

23.74

MW-11

14.98

@A @A

Figure 1. Installed Groundwater Monitoring Well Locations and Groundwater Elevation Contours Map

0 240 Feet Imagery Source: six84 media, 201920

-09

-11

\20

_A ua

_F ue lFa rm

_R mA

-C \06

_F iel dW ork

\gw _2

9-0

9-0 8_ rev 2.m xd

-M art ine z b rod rig ue s

@A Installed Monitoring Well 55-Foot Diameter Tank Extent Approximate Extent of Former Aua Fuel Farm

References:

Coordinate System: Universal Transverse Mercator, Zone 2 South, NAD1983 (PA11)

Aua Fuel Farm Tank Removal and Petroleum Contamination Investigation Aua, Island of Tutuila, American Samoa

TUTUILA

Source: ESRI World Topographic Map

Site Location

MW-4 is the well SB-C-MW1 from the 2012 Remedial Investigation.

All groundwater elevations are in feet above mean sea level.

Coordinate units in meters.

depth to water top of casing

Notes:

DTW

TOC

MW ID TOC DTW GW Elevation Northing Easting

MW-1 7.09 5.68 1.41 8422414.367 536003.758

MW-2 3.80 1.71 2.09 8422353.621 536111.120

MW-3 5.05 3.21 1.84 8422236.528 536179.057

MW-4 3.95 2.64 1.31 8422070.830 536250.466

MW-5 22.01 19.31 2.70 8422546.061 536103.465

MW-6 10.15 5.46 4.69 8422420.159 536219.992

MW-7 11.43 7.91 3.52 8422287.092 536296.738

MW-8 6.38 3.73 2.65 8422183.470 536344.478

MW-9 17.60 1.93 15.67 8422529.831 536229.195

MW-10 15.24 3.94 11.30 8422438.752 536323.823

MW-11 19.81 4.83 14.98 8422313.215 536412.861

MW-12 24.84 3.98 20.86 8422538.422 536342.420

MW-13 31.88 8.14 23.74 8422441.706 536424.373

S S

0 30 Feet

Imagery Source: six84 media, 2019

-0

-2

U S

A C

A u a

F u e lF a rm

R m A

-C \1

R A

R \1

B so il_ co n t_ e xt e n ts

Ta nk re v8 .m

R R

G -M a rt in ez ah a ck e r

Approximate Area of Contamination exceeding TPESLs

Proposed Excavation Area

Approximate Extent of Free Product

Approximate Extent of Sheen or Odor

Remaining Tank Metal

S Approximate Sewer Line

55-Foot Diameter Tank Extent

Approximate Extent of Former Aua Fuel Farm

Figure 2. Extent of Contamination and Proposed Excavation Area – Tank 1 Aua Fuel Farm Tank Removal and Petroleum Contamination Investigation Aua, Island of Tutuila, American Samoa

Source: ESRI World Topographic Map

Coordinate System: Universal Transverse Mercator, Zone 2 South, NAD1983 (PA11)

Notes:

ft bgs sq ft

TPESL

feet below ground surface square feet Tropical Pacific Environmental Screening Level

Site Summary Average Depth to Groundwater:

10.71 ft bgs Observed Depth of Contamination:

2 to 13 ft bgs Approximate Area of Contaminated Soil:

7,707 sq ft Approximate Area of Remaining Tank Metal:

641 sq ft

S S

W W W W W

W W

W W W W W W W W W W W

S S S S

0 30 Feet

Imagery Source: six84 media, 2019

-0

U S

A C

A u a

F u e lF a rm

R m A

-C \1

R A

R \1

B so il_ co n t_ e xt e n ts

Ta nk re v1

R G

-M a rt in e z h a ck e r

Approximate Area of Contamination exceeding TPESLs

Proposed Excavation Area

Approximate Extent of Free Product

Remaining Tank Metal

S Approximate Sewer Line

W Approximate Water Line

55-Foot Diameter Tank Extent

Approximate Extent of Former Aua Fuel Farm

Coordinate System: Universal Transverse Mercator, Zone 2 South, NAD1983 (PA11)

Figure 3. Extent of Contamination and Proposed Excavation Area – Tank 2 Aua Fuel Farm Tank Removal and Petroleum Contamination Investigation Aua, Island of Tutuila, American Samoa

Source: ESRI World Topographic Map

Notes:

ft bgs sq ft

TPESL

feet below ground surface square feet Tropical Pacific Environmental Screening Level

Site Summary Average Depth to Groundwater:

14.33 ft bgs Observed Depth of Contamination:

2 to 21.5 ft bgs Approximate Area of Contaminated Soil:

4,927 sq ft Approximate Area of Remaining Tank Metal:

149 sq ft

S S

W W W W W W

S S S

S S

S S S SS S S S S S S S

W W W W W W W W W

W W

0 40 Feet

Imagery Source: six84 media, 2019

-0

U S

A C

A u a

F u e lF a rm

R m A

-C \1

R A

R \1

B so il_ co n t_ e xt e n ts

Ta nk re v1

R G

-M a rt ck e r

Approximate Area of Contamination exceeding TPESLs

Proposed Excavation Area

Approximate Extent of Free Product

Approximate Extent of Sheen or Odor

Remaining Tank Metal

Approximate Drainage Canal

S Approximate Sewer Line

W Approximate Water Line

55-Foot Diameter Tank Extent

Approximate Extent of Former Aua Fuel Farm

Figure 4. Extent of Soil Contamination and Proposed Excavation Area – Tank 3 Aua Fuel Farm Tank Removal and Petroleum Contamination Investigation Aua, Island of Tutuila, American Samoa

Source: ESRI World Topographic Map

Coordinate System: Universal Transverse Mercator, Zone 2 South, NAD1983 (PA11)

Notes:

ft bgs sq ft

TPESL

feet below ground surface square feet Tropical Pacific Environmental Screening Level

Site Summary Average Depth to Groundwater:

9.98 ft bgs Observed Depth of Contamination:

2.5 to 24.5 ft bgs Approximate Area of Contaminated Soil:

16,651 sq ft Approximate Area of Remaining Tank Metal:

1,438 sq ft

0 30 Feet

Imagery Source: six84 media, 2019

-0

U S

A C

A u a

F u e lF a rm

R m A

-C \1

R A

R \1

B so il_ co n t_ e xt e n ts

Ta nk re v1

R G

-M a rt in h a ck e r

Approximate Area of Contamination exceeding TPESLs

Proposed Excavation Area

Approximate Extent of Free Product

Approximate Extent of Sheen or Odor

Remaining Tank Metal

55-Foot Diameter Tank Extent

Approximate Extent of Former Aua Fuel Farm

Figure 5. Extent of Contamination and Proposed Excavation Area – Tank 4 Aua Fuel Farm Tank Removal and Petroleum Contamination Investigation Aua, Island of Tutuila, American Samoa

Source: ESRI World Topographic Map

Coordinate System: Universal Transverse Mercator, Zone 2 South, NAD1983 (PA11)

Notes:

ft bgs sq ft

TPESL

feet below ground surface square feet Tropical Pacific Environmental Screening Level

Site Summary Average Depth to Groundwater:

9.88 ft bgs Observed Depth of Contamination:

5 to 12.5 ft bgs Approximate Area of Contaminated Soil:

5,970 sq ft Approximate Area of Remaining Tank Metal:

965 sq ft

S S

0 30 Feet

Imagery Source: six84 media, 2019

-0

U S

A C

A u a

F u e lF a rm

R m A

-C \1

R A

R \1

B so il_ co n t_ e xt e n ts

Ta nk re v8

G -M a rt ck e r

Approximate Area of Contamination exceeding TPESLs

Proposed Excavation Area

Approximate Extent of Free Product

Approximate Extent of Sheen or Odor

Remaining Tank Metal

55-Foot Diameter Tank Extent

S Approximate Sewer Line

Approximate Extent of Former Aua Fuel Farm

Figure 6. Extent of Contamination and Proposed Excavation Area – Tank 5 Aua Fuel Farm Tank Removal and Petroleum Contamination Investigation Aua, Island of Tutuila, American Samoa

Source: ESRI World Topographic Map

Coordinate System: Universal Transverse Mercator, Zone 2 South, NAD1983 (PA11)

Notes:

ft bgs sq ft

TPESL

feet below ground surface square feet Tropical Pacific Environmental Screening Level

Site Summary Average Depth to Groundwater:

6.89 ft bgs Observed Depth of Contamination:

2.5 to 25 ft bgs Approximate Area of Contaminated Soil:

6,101 sq ft Approximate Area of Remaining Tank Metal:

995 sq ft

W W

0 40 Feet

Imagery Source: six84 media, 2019

-0

U S

A C

A u a

F u e lF a rm

R m A

-C \1

R A

R \2

B so il_ co n t_ e xt e n ts

Ta nk re v9

G -M a rt ck e r

Approximate Area of Contamination exceeding TPESLs

Proposed Excavation Area

Approximate Extent of Free Product

Approximate Extent of Sheen or Odor

Remaining Tank Metal

Approximate Drainage Canal

W Approximate Water Line

55-Foot Diameter Tank Extent

Approximate Extent of Former Aua Fuel Farm

Figure 7. Extent of Contamination and Proposed Excavation Area – Tank 6 Aua Fuel Farm Tank Removal and Petroleum Contamination Investigation Aua, Island of Tutuila, American Samoa

Source: ESRI World Topographic Map

Coordinate System: Universal Transverse Mercator, Zone 2 South, NAD1983 (PA11)

Notes:

ft bgs sq ft

TPESL

feet below ground surface square feet Tropical Pacific Environmental Screening Level

Site Summary Average Depth to Groundwater:

8.51 ft bgs Observed Depth of Contamination:

3 to 13 ft bgs Approximate Area of Contaminated Soil:

22,422 sq ft Approximate Area of Remaining Tank Metal:

1,266 sq ft

S S

0 40 Feet

Imagery Source: six84 media, 2019

-0

U S

A C

A u a

F u e lF a rm

R m A

-C \1

R A

R \2

B so il_ co n t_ e xt e n ts

Ta nk re v6

G -M a rt ck e r

Approximate Area of Contamination exceeding TPESLs

Proposed Excavation Area

Approximate Extent of Free Product

Approximate Extent of Sheen or Odor

S Approximate Sewer Line

55-Foot Diameter Tank Extent

Approximate Extent of Former Aua Fuel Farm

Figure 8. Extent of Contamination and Proposed Excavation Area – Tank 7 Aua Fuel Farm Tank Removal and Petroleum Contamination Investigation Aua, Island of Tutuila, American Samoa

Source: ESRI World Topographic Map

Coordinate System: Universal Transverse Mercator, Zone 2 South, NAD1983 (PA11)

Site Summary Average Depth to Groundwater:

8.02 ft bgs Observed Depth of Contamination:

2 to 15 ft bgs Approximate Area of Contaminated Soil:

17,473 sq ft Approximate Area of Remaining Tank Metal:

Unknown

Notes:

ft bgs sq ft

TPESL

The location of Tank 7 remnants could not be confirmed. Tank 7 is likely present south of its previously suspected location and beneath a residential structure (as shown).

feet below ground surface square feet Tropical Pacific Environmental Screening Level

S S

0 30 Feet

Imagery Source: six84 media, 2019

-0

U S

A C

A u a

F u e lF a rm

R m A

-C \1

R A

R \2

B so il_ co n t_ e xt e n ts

Ta nk re v7

G -M a rt ck e r

Approximate Area of Contamination exceeding TPESLs

Proposed Excavation Area

Approximate Extent of Free Product

Approximate Extent of Sheen or Odor

Remaining Tank Metal

S Approximate Sewer Line

55-Foot Diameter Tank Extent

Approximate Extent of Former Aua Fuel Farm

Figure 9. Extent of Contamination and Proposed Excavation Area – Tank 8 Aua Fuel Farm Tank Removal and Petroleum Contamination Investigation Aua, Island of Tutuila, American Samoa

Source: ESRI World Topographic Map

Coordinate System: Universal Transverse Mercator, Zone 2 South, NAD1983 (PA11)

Notes:

ft bgs sq ft

TPESL

feet below ground surface square feet Tropical Pacific Environmental Screening Level

Site Summary Average Depth to Groundwater:

6.82 ft bgs Observed Depth of Contamination:

4 to 16.5 ft bgs Approximate Area of Contaminated Soil:

11,777 sq ft Approximate Area of Remaining Tank Metal:

590 sq ft

S S

0 30 Feet

Imagery Source: six84 media, 2019

-0

U S

A C

A u a

F u e lF a rm

R m A

-C \1

R A

R \2

B so il_ co n t_ e xt e n ts

Ta nk re v7

G -M a rt ck e r

Approximate Area of Contamination exceeding TPESLs

Proposed Excavation Area

Approximate Extent of Free Product

Approximate Extent of Sheen or Odor

Remaining Tank Metal

S Approximate Sewer Line

55-Foot Diameter Tank Extent

Approximate Extent of Former Aua Fuel Farm

Figure 10. Extent of Contamination and Proposed Excavation Area – Tank 9 Aua Fuel Farm Tank Removal and Petroleum Contamination Investigation Aua, Island of Tutuila, American Samoa

Source: ESRI World Topographic Map

Coordinate System: Universal Transverse Mercator, Zone 2 South, NAD1983 (PA11)

Notes:

ft bgs sq ft

TPESL

feet below ground surface square feet Tropical Pacific Environmental Screening Level

Site Summary Average Depth to Groundwater:

10.71 ft bgs Observed Depth of Contamination:

1.5 to 15 ft bgs Approximate Area of Contaminated Soil:

6,812 sq ft Approximate Area of Remaining Tank Metal:

1,520 sq ft

0 30 Feet

Imagery Source: six84 media, 2019

-0

U S

A C

A u a

F u e lF a rm

R m A

-C \1

R A

R \2

B so il_ co n t_ e xt e n ts

Ta nk re v5

G -M a rt ck e r

Approximate Area of Contamination exceeding TPESLs

Proposed Excavation Area

Approximate Extent of Free Product

Approximate Extent of Sheen or Odor

Remaining Tank Metal

55-Foot Diameter Tank Extent

Approximate Extent of Former Aua Fuel Farm

Figure 11. Extent of Contamination and Proposed Excavation Area – Tank 10 Aua Fuel Farm Tank Removal and Petroleum Contamination Investigation Aua, Island of Tutuila, American Samoa

Source: ESRI World Topographic Map

Coordinate System: Universal Transverse Mercator, Zone 2 South, NAD1983 (PA11)

Notes:

ft bgs sq ft

TPESL

feet below ground surface square feet Tropical Pacific Environmental Screening Level

Site Summary Average Depth to Groundwater:

8.71 ft bgs Observed Depth of Contamination:

3.5 to 17 ft bgs Approximate Area of Contaminated Soil:

3,816 sq ft Approximate Area of Remaining Tank Metal:

1,053 sq ft

0 30 Feet

Imagery Source: six84 media, 2019

-0

U S

A C

A u a

F u e lF a rm

R m A

-C \1

R A

R \2

B so il_ co n t_ e xt e n ts

Ta nk re v7

R G

-M a rt in ha ck e r

Approximate Area of Contamination exceeding TPESLs

Proposed Excavation Area

Approximate Extent of Free Product

Approximate Extent of Sheen or Odor

Remaining Tank Metal

W Approximate Water Line

55-Foot Diameter Tank Extent

Approximate Extent of Former Aua Fuel Farm

Figure 12. Extent of Contamination and Proposed Excavation Area – Tank 11 Aua Fuel Farm Tank Removal and Petroleum Contamination Investigation Aua, Island of Tutuila, American Samoa

Source: ESRI World Topographic Map

Coordinate System: Universal Transverse Mercator, Zone 2 South, NAD1983 (PA11)

Notes:

ft bgs sq ft

TPESL

feet below ground surface square feet Tropical Pacific Environmental Screening Level

Site Summary Average Depth to Groundwater:

5.37 ft bgs Observed Depth of Contamination:

6 to 7.5 ft bgs Approximate Area of Contaminated Soil:

6,580 sq ft Approximate Area of Remaining Tank Metal:

1,028 sq ft

S S

S S S

S S

0 30 Feet

Imagery Source: six84 media, 2019

-0

U S

A C

A u a

F u e lF a rm

R m A

-C \1

R A

R \2

B so il_ co n t_ e xt e n ts

Ta nk re v5

G -M a rt ck e r

Approximate Area of Contamination exceeding TPESLs

Proposed Excavation Area

Approximate Extent of Free Product

Approximate Extent of Sheen or Odor

Remaining Tank Metal

S Approximate Sewer Line

55-Foot Diameter Tank Extent

Approximate Extent of Former Aua Fuel Farm

Figure 13. Extent of Contamination and Proposed Excavation Area – Tank 12 Aua Fuel Farm Tank Removal and Petroleum Contamination Investigation Aua, Island of Tutuila, American Samoa

Source: ESRI World Topographic Map

Coordinate System: Universal Transverse Mercator, Zone 2 South, NAD1983 (PA11)

Notes:

ft bgs sq ft

TPESL

feet below ground surface square feet Tropical Pacific Environmental Screening Level

Site Summary Average Depth to Groundwater:

9.11 ft bgs Observed Depth of Contamination:

2 to 17.5 ft bgs Approximate Area of Contaminated Soil:

11,684 sq ft Approximate Area of Remaining Tank Metal:

2,364 sq ft

Estimated Contaminated Excavation Volumes Based on DRO/RRO Data

Tank Site 1‐ 1,530 bcy 3,858 sf

Tank Site 2‐ 1,856 bcy 3,497 sf

Tank Site 3‐ 2,016 bcy 5,454 sf

Tank Site 4‐ 1,222 bcy

- 3,340 sf

Tank Site 5‐ 137 bcy - 535 sf

Tank Site 6‐ 1,737 bcy 5,510 sf

Tank Site 7‐ 884 bcy 2,977 sf

Tank Site 8‐ 1,726 bcy 6,832 sf

4,718 sf

2,985 sf

Tank Site 9‐ 1,871 bcy

Tank Site 10‐ 963 bcy

Tank Site 11- 152 bcy

Tank Site 12‐ 1,988 bcy

5,891 sf

‐3’ OB

‐3.5’ OB

‐3’ OB

‐3.5 OB

‐5’ OB

‐4’ OB

‐3’ OB

Shoring

No Shoring

Shoring

No Shoring

Shoring

No Shoring

Shoring (partial)

No Shoring

Shoring

TOTALS 16,081 bcy - 46,359 sf

762 sf

‐3’ OB

File details come from the government source that posted it. Updated Apr 10, 2020.