83503

February 14, 1995

Ms. Cathy Gilmore U.S. EPA Region 6 Superfund Enforcement Branch First Interstate Bank Tower 1445 Ross Avenue Dallas, Texas 75202

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RE: Design Information Data Collection Offsite Areas Removal Action Lincoln Creosote Site Bossier City, Louisiana

Dear Ms. Gilmore:

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W.O.#172-08

On behalf of our client, Joslyn Manufacturing Co., ERM-Southwest, Inc. is pleased to present this revised letter outlining our proposed plan for gathering design information at the referenced site. The plan has been revised in accordance with our telephone conversation today.

The concentration profile information will be critical to final planning for the removal action. The data collected will be used as a design tool to identify a preliminary depth of excavation in the former ditch area and to refine volume estimates necessary for scheduling and for bid procurement.

As you know, ERM-Southwest initiated pre-excavation sampling activities on January 25, 1995. The sampling outlined in the EPA-approved Pre­Excavation Sampling Plan (dated January 20, 1995) is being performed outside the preliminary excavation boundaries to provide lateral confirmation of attainment of removal action goals. These pre-excavation sampling activities are also being performed in accordance with the EPA approved QAPP.

Objectives

Upon completion of pre-excavation sampling, Joslyn is proposing to perform additional borings near the former drainage ditch (i.e., within the preliminary excavation boundaries) to provide information regarding soil to be removed. The focus of the boring program outlined herein is to gather design information necessary to properly plan the removal action. By obtaining this data "up front", Joslyn hopes to be able to better define removal quantities for budgetary, planning, scheduling, and bidding purposes.

ERM-Southwe:-t, N

3501 N. Cause~.·~,y 00 Suite200 t­Metairie, Louitiei.i 0 (504) 83H,700 O (504) 831-6742 IFi\,

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16300 Katy Freeway Suite 300 Houston. Texas 77094-1611 {713) 579-8999 {713) 579-8988 (Fax)

8310 Capital of Texas Highway North Suite 405 Austin, Texas 78731-1079 {512) 346-1700 (512) 346-2767 (Fax)

4100 Spring Valley Road Suite200 Dallas, Texas 75244 (214) 458-7272 (214) 458-7204 (Fax)

5959 Gateway West Blvd . Suite655 El Paso, Texas 79925 (915) 779-6666 (915) 779-6632 (Fax)

A member of the Environmental Resources Management Group

001782

Ms. Cathy Gilmore U.S. EPA Region 6 February 14, 1995 Page2

Procedures

The initial approach for the design data gathering step is presented below. Joslyn is proposing to complete approximately 12 borings along the 1200 linear feet of the former drainage ditch targeted in the proposed removal action. In general, the borings will be spaced closer together in the western portion of the proposed removal area (i.e., nearer the Lincoln Creosote site) and further apart to the east.

The boring locations will alternate between the area north and south of the former drainage ditch, but still within the preliminary excavation boundaries. The borings will be completed to a depths ranging from 2.5 to 5 feet (i.e., the maximum depth of excavation as presented in the EE/CA). Samples will be collected from the 2- to 5-foot-interval.

The approach to sampling will be to collect one sample per borehole. The sample will be collected from the uppermost visibly clean six-inch-interval below a depth of two feet. The purpose of the sampling is to demonstrate that the soil left in place after the removal meets the remedial objectives. Soil from the center of the core from the selected six-inch interval will be placed directly into sample jars.

The samples collected will be analyzed for base neutral extractibles using SW-846 Method 8270 (i.e., to focus on PNA's). These data will be compared to remedial goals in the two- to five-foot-interval to establish preliminary excavation depths. CLP analyses is not warranted and will not be performed, since the data is for design purposes and will not be used for confirmation or risk assessment. The sampling will be performed in general accordance with the QAPP and the data will be considered Level III data (i.e., CLP not required).

Joslyn may also obtain additional information for its own internal documentation at the time that we do this sampling.

172-08\GILMORE.FI 4

ERM-Southwest, Inc:.

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Ms. Cathy Gilmore U.S. EPA Region 6 February 14, 1995 Page 3

We appreciate your input on the proposed boring program and as we discussed, we will be beginning this sampling on February 16, 1995. Please feel free to call me if you have any questions.

Sincerely,

ERM-SOUTHWEST, INC.

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Lance R. Cooper, P.E . Senior Associate

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cc: Mr. Carl Grabinski - Joslyn Corporation

172-08\GILMORE.Fl4

ERM-Southwest, Inc.

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001784