AddendumTo

Final

Field Sampling Plan

Popile, Inc. Superfund SiteEl Dorado, Arkansas

Prepared for:U.S. Army Corps of Engineers

New Orleans DistrictNew Orleans, Louisiana

Prepared bv:Morrison Knudsen

Littleton, Colorado

Total Environmental Restoration ContractContract No DACA56-94-D-0021

Task Order #0018Modification 001811

December 17, 1999

FSP Addendum PopUe RD/RA, El Dorado, AR 12/17/99

2.0 Revisions and Updates

The FSP requires changes in two areas; the first updates in the PSP occur in theintroduction by revising:• Section I.I.I- History of Operations• Figure 1-1• Section 1.2.5—Nature and Extent of Contamination

The second area of change occurs in the on-site investigation section with revisionsincluding:• Section 4.0 - On-Site Investigation• Section 4.1 - Subsurface Soil Investigations• Section 4.3 - On-Site Field Methods• Table 4-1• Table 4-2

2.1 History of OperationsSection 1.1.1 - A paragraph is added to identify the location of the UST. An updatedFigure 1-1 is included that illustrates the location of the UST. Section 1.2.5 - Aparagraph is added to describe potential contamination associated with the UST.Contamination will not be known until removal and investigation is carried out.

2.2 On-site InvestigationSection 4.0 - A paragraph is added that includes me UST removal and soil investigationas part of the on-site program.Section 4.1 - A bullet line item is added that identifies the specific objectives of the USTsubsurface soil investigation.Section 4.3 - A new section (4.3.7) is added that briefly describes the UST on-site fieldmethods to be used. Table 4-1 is updated to add the UST investigation to the overviewtable. Table 4-2 is updated to reflect UST chemical sample analysis.

2.3 Analytical MethodsSection 7.0 - A new section is added regarding TRPH; Section 7.2.8. - An insert is addedat the end of Table 7-1. Standard Operating Procedures for TPH and TEPH are added atthe end of the Section.

2.4 InsertsInserts for the above mentioned changes can be found on subsequent pages.

FSP Addendum Popile RD/RA, El Dorado, AR 12/17/99

Insert for Section I.I.I -following page 1-2

To be added as the last paragraph in Section 1.1.1...

In addition, the location of an underground storage tank (UST), estimated to be 300-500gallons, is shown in Figure 1-1.

FSP Addendum Popile KD/RA, El Dorado, AR 12/17/99

1.0 Introduction

This Addendum was developed by Morrison Knudsen Corporation (MK) to support thesecondary area clay cap and sitework at the Popile Superfund Site, El Dorado, Arkansas.It is inresponse to Modification 001811, Contract Number DACA56-94-D-0021 of theU.S. Army Corps of Engineers, Tulsa District (USACE) Total Environmental RestorationContract (TERC). The document's objective is to update, revise and supplementcurrently existing work plans in order that those plans reflect the modified scope of work.

1.1 ScopeThis addendum addresses the following plan:

• Field Sampling Plan (FSP)

The FSP was submitted June, 1998 and subsequently accepted as the Final FSP by theUSACE with comments. The revisions and updates presented in this addendum attend tothe additional work identified in modification 001811. No deletion of procedures hastaken place unless noted.

The revisions and updates are presented in two parts. Initially, the sections, pagenumbers, and subject matter are identified and the update is stated (Section 2). Secondly,insert pages are provided identifying the section and page number location for insertion.

FSP Addendum Popile RD/RA, El Dorado, AR 12/17/99

Insert for Section 1.2.5 -following page 1-6

To be added as the last bullet line item in Section 1.2.5...

• Regarding the UST, no determination of the extent of COCs can be made until thesite is excavated, the condition of the UST is inspected and soil samples from theinvert are analyzed.

FSP Addendum Popile KD/RA, El Dorado, AR • 12/17/99

Insert for Section 4.0 —following page 4-1

The first sentence in the first paragraph of Section 4.0 should read as follows...

The on-site program consists of borehole drilling, monitoring well installation, existingwell abandonment, pump well installation, aquifer testing and UST closure.

FSP Addendum Popile RD/RA, El Dorado, AR • 12/17/99

Insert for Section 4.1 —following page 4-2

Following the final bullet in Section 4.1, add the bullet line item...

• Determine if the contents of the UST has leaked and contaminated the tank'ssubsurface soils.

FSP Addendum Popile KD/RA, El Dorado, AR • 12/17/99

Insert/Replacementfor Table 4-1 -following page 4-9Table 4-1-Rev. 1

On-Site Investigation Overview(Includes adjacent Great Lakes fenced property)

Borehole orWettBD

OW-2

TOTALS

Well Abandonm

MW-7,-15,-18,-19,-20,

PZ-05 and -08

Contingency Drilling (MW-)

MW-

MW-

TOTALS

Existing Monitoring Well Samplir

22 wells

Existing USTs

1

A®?'

25'

70'60'

ents

164'

60-

50'

110'

N/A

62"

Casing/Borehole Size

2" PVC

2(13" OD)2(8'/4" OD)

2" PVC/1" Steel

2" PVC

2" PVC

2(8%" OD) boreholes

"B

l",2",and4"

N/A

ScreenLength

5'PVC

N/A

5' Steel

5' Steel

N/A

N/A

Soil Sampling' ': Parameters .

None

N/A

None

None

None

'Chem

• eroundftatefSampling Parameters

None

N/A

'Chem

'Chem

'Chem'Biogeochemical

N/A

Location

20'fromPW-2

Impoundment Area

Adjacent to either BH-22or-23

Adjacent to either BH-22or-23

Across site

Between 5J and 5K. Scaplocations.

Purpose

Define aquifer characteristics withinshallower portions of aquifer

Remove PVC cased wells and onepiezometer from highly contaminatedsoil areas, and remove brokenpiezometer.

Monitor groundwater quality acrossDNAPL zone in lower Horizons (iffound).

Monitor groundwater quality directlyabove DNAPL zone (if found) todetermine vertical diffusion.

Define configuration and extent ofgroundwater plume.

Remove UST and obtain closure

SCABS":.'Calibration:

No

N/A

No

No

N/A

N/A

Notes: 'Chem - SVOC (by Method 8270) and/or BTEX (by Method 8260) and/or TPH (by Method 418.1)'Chem - SVOC (partial) (by SIM) and/or BTEX (by Method 8260) and/or TPH (by Method 418.1)'Geotech © - Grain size/vertical permeability on clay layer'Geotech(S) - Grain size/moisture/dry density/specific gravity/porosity/TOC on sand unit'Geotecl^SL) - Grain size/moisture/dry density/specific gravity/porosity/vertical penneabilily/TOC on silt layer'Biogeochemical - Microbial counts (for soils), Microbial counts, and water quality (for waters)

Insert for Section 4.3 -following page 4-4

Insert two new Sections to read as follows...

4.3.7 UST RemovalThe UST will be removed in accordance with ADEQ guidelines. Prior to removal of thetank, a sample of the tank contents will be collected to determine me nature of thephase(s) and the product type. Subsequent soil samples will be collected from beneathme tank and analyzed for possible release of tank contents.

4.3.8 UST Sample CollectionOne sample of the tank contents will be collected using a disposable bailer, dipper, orother suitable device. Samples will be analyzed as outlined in Table 4-2.

After removal of the tank, three samples will be collected from beneath the tank (one inthe middle and one on each end) using stainless steel equipment. Samples will beanalyzed as outlined in Table 4-2.

FSP Addendum Popile RD/RA, El Dorado, AR • 12/17/99

Table 4-2

The first column of Table 4-2 should read as follows.

"Borehole, Well, or Sample Location"

Insert a column to Table 4-2 that reads as follows...

"TRPH 8015 (Soil, Water)"

Insert at the end of Table 4-2 (pg. 4-15).

Borehole,Well orSample

Location

Tank

TankExcavation

Totals

SampleMatrix

TankContents

Soil

SampleDepth

NA

NA

Semi-Volatiles'GC/MS

SIM(WaterOnly)

32

BTEX(Soil,

Water)

X

X

16 Soil17 Water

TPH 418.1(Soil,

Water)

21 Soil15 Water

Semi-Volatiles'8270 (Soil,

Water)

X

X

40 Soil11 Water

WaterQuality

Parameters2

14

TOC

14

TRPH8015 (Soil,

Water)

X

X

3 Soil1 Water

PSP Addendum Popile RD/RA, El Dorado, AR 12/17/99

Insert for Section 7.2 -following page 7-7

Insert a new section to read as follows...

7.2.8 Total Recoverable Petroleum Hydrocarbons (TRPH)The tank contents and soil samples collected from beneath the tank will be analyzed forTRPH by EPA Method 8015. Samples will be analyzed in accordance with the analyticalmethod and laboratory SOP, which is presented in Appendix B of the QAPP. PQLs forTRPH are presented in Table 7-4.

FSP Addendum ' Popile RD/RA, El Dorado, AR • 12/17/99

Inserts for Table 7-1

Insert at the end of Table 7-1 (page 7-9)...

Analyte

TEPH

TVPH

AnalyticalMethodEPA 8015

EPA 8015

Sample ContainerSoil/Sludge1x4 oz glassjar w/teflonlined lid1x4 oz glassjar w/teflonlined lid

Water1x1 L amberw/teflonlined lid3x40 mlVOA vialw/teflonlined lid

Sample PreservationSoil/SludgeCool to 4° C

Cool to 4°C

WaterCool to 4° C

Cool to 4°C

Maximum Holding TimeSoil/Sludge14 daysextraction, 40days analysis14 days

Water7 daysextraction, 40days analysis14 days

FSP Addendum Popile RD/RA, El Dorado, AR 12/17/99

Inserts for Table 7-4

Insert at the end of Table 7-4 (page 7-12)...

Analyte

TEPHTVPH

Method

EPA8015EPA 8015

Practical Quantitation LimitWater, ug/L10020

Soil, ug/KglOmg/Kg100

FSP Addendum Popile RD/RA, El Dorado, AR 12/17/99