N PAHs in sediment Boiler Ponds 1 2 Wastewater Ponds Fire - - PDF document

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N

NAPL Marsh Deposits/Muck Tan/Yellow Sands Gray Sands and Silt Sandstone Clay Groundwater Table Elevaon Groundwater Flow Direcon LEGEND

Not to Scale

PAHs in sediment

S t u r g e

• n

C r e e k

Over land flow Boiler Ponds 1 2 Wastewater Ponds Infiltraon Fire Water Pond Surficial Aquifer P e e d e e A q u i f e r

EN1028151057WDC GETG_Kerr-McGee_Navassa_CSM_v3.ai 4-4-16 ct

Conceptual Site Model Upland to Marsh Transion Zone

Kerr McGee Chemical Corporaon Site Navassa, Brunswick County, NC

Suspected Pond

Identified in 1975 Photograph

Former Process Area

1965 Aerial Imagery

• 50
• 100

Approximate Elevation

(feet mean sea level)

Aerial Imagery - 2015

Evaporation Pond

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" ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " )

! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! (

" ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " ) " )

! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! (

" ) " ) " ) " ) " ) " ) " )

±

225 45 0 Scal e I n Feet

D ATE: 12/7 /20 15 C R EATED BY: N C C H EC KED BY: KB PN : 65 9368 Fi gur e A – C om pl et ed and P r

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Sam pl i ng Locat i

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Completed SRI Sampling Locations (Sample ID, Total Depth, NAPL Interval)

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Tar G O ST, N APL not det ect ed

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Tar G O ST, N APL D et ect ed

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Soni c Bor i ng, NAPL not det ect ed

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Soni c Bor i ng, NAPL D et ect ed Proposed Monitoring Wells:

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Sur f i ci al Aqui f er

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Vi br acor e Sam pl e Locat i

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Existing Permanent Monitoring Wells: Tar G O ST Sam pl i ng Tr ansect O n Si t e R oads Pat hs For m er I m poundm ent

Supplemental Remedial Investigation Work Plan

CH 2M HI LL Nor t h Car

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Note: Locations of former impoundments are approximate, based on draft Remedial Investigation report developed by AECOM. "S" denotes monitoring well to be screened in shallow perched water.

Kerr-McGee Chemical Corporation Site, Navassa, North Carolina

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D ATE: 12/7 /20 15 D ATE: 12/7 /20 15

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Completed TarGOST and Sonic Borings, and Proposed Vibracore Sampling Locations

A B C D E F G H I J K L M N O P

Suspected Pond

Identified in 1975 Photograph

Former Evaporation Pond Fire Water Pond Former Boiler Ponds 1 2 Former Wastewater Ponds Former Process Area