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Subject: RE: Sampling at GCC Property 

PostedDate: 08/16/2007 05:24:12 PM 

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Thread_Topic: Sampling at GCC Property 

Thread_Index: AcfgIG9y7dMkXY5/TDaURgIgAjm9wwAMXMiQ 

From: "Ahmed, Riaz \(Houston,TX-US\)" <RAhmed@TRCSOLUTIONS.com> 

SendTo: Katrina Coltrain/R6/USEPA/US@EPA 

CopyTo: <allan.pasteris@state.nm.us>,"Clark, David C \(Topeka\)" 

<David.Clark@bnsf.com>,<David.Mayerson@state.nm.us> 

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We will attempt to take three surface soil samples at the CS-G10-1, 

CS-G10-2 and CS-G10-3 Monday afternoon or early Tuesday and ship it for 

analysis for zinc. Subsequent excavation and sampling will be done after 

upper sands investigation is complete. 

-----Original Message----- 

From: Coltrain.Katrina@epamail.epa.gov 

[mailto:Coltrain.Katrina@epamail.epa.gov] 

Sent: Thursday, August 16, 2007 11:12 AM 

To: Ahmed, Riaz (Houston,TX-US) 

Cc: allan.pasteris@state.nm.us; Clark, David C (Topeka); 

David.Mayerson@state.nm.us 

Subject: RE: Sampling at GCC Property 

Riaz, according to number 2 the SB sampling will be completed and then 

following the upper investigation, the soils will be excavated. For 

clarification, additional soil samples will be taken next week, August 

20 and 21. Is this correct? 

Katrina Higgins-Coltrain 

Remedial Project Manager 

USEPA Superfund 

Louisiana/New Mexico/Oklahoma Team (6SF-RL) 

1445 Ross Avenue, Suite 1200 

Dallas, TX 75202 

214-665-8143 

214-665-6660 (fax) 

"Ahmed, Riaz 

\(Houston,TX-US\ 

)" To 

<RAhmed@TRCSOLUT Katrina Coltrain/R6/USEPA/US@EPA 

IONS.com> cc 

<allan.pasteris@state.nm.us>, 

08/15/2007 05:56 "Clark, David C \(Topeka\)" 

PM <David.Clark@bnsf.com>, 

<David.Mayerson@state.nm.us> 

Subject 

RE: Sampling at GCC Property 

000498
I tried to take a short cut. I apologize. However, here are the answers. 

1. Identified locations are correct. TRC resampling of SB designated 

samples were next to the original locations. In the final report we will 

add these locations and note values of SRGs. 

2. All soils excavated during this operation will be staged on the 

southern portion of the site which is fenced. The excavated soil will be 

eventually stabilized and managed in the wastewater reservoir in a 

manner similar to other soils which may excavated within the fenced 

portion of the site during remedial action. 

3. This activity will not impact the upper sands investigation. We 

expect to complete the initial sampling upfront and initiate the 

excavation subsequent to completion of the upper sand investigation 

field work. The entire GCC activity report will be completed and 

submitted to agencies six weeks after achieving removal of contaminated 

soil in these three locations. The time to achieve satisfactory removal 

of impacted soil will depend upon the number of sampling /excavation 

iterations needed. Initially we will excavate the surrounding areas that 

are visually or olfactory impacted. However, this will not work for 

areas impacted by zinc. 

4. Our task one is to sample CS-G10-1, CS-G10-2 and CS-G10-3 

individually at the 0 to 6 inch depth. This is the depth at which these 

samples were taken for verification purposes. The objective of this 

sampling effort will be to identify samples that caused the composite to 

exceed the zinc SRG. Once it is determined, then location(s) exceeding 

SRG will be subjected to excavation. 

5. A PID will be on site for purposes of monitoring exposure. 

6. A GPS unit will be available to document sampling locations and to 

identify boundaries of excavation. 

7. The final report will have all procedures, methods, results 

documented. Legal description will be imported from sales document. 

I trust you will find the above to satisfactory responses to your 

comments. Please call me if you have questions. My number is 

713-249-8547. Thanks for quick review. 

Riaz 

-----Original Message----- 

From: Coltrain.Katrina@epamail.epa.gov 

[mailto:Coltrain.Katrina@epamail.epa.gov] 

Sent: Tuesday, August 14, 2007 3:45 PM 

To: Ahmed, Riaz (Houston,TX-US) 

Cc: allan.pasteris@state.nm.us; Clark, David C (Topeka); 

David.Mayerson@state.nm.us; Ahmed, Riaz (Houston,TX-US) 

Subject: Re: Sampling at GCC Property 

Dave/Riaz, NMED/EPA have reviewed the proposed plan of action for the 

removal of soil exceeding the soil remediation goals and have the 

following requests and comments. 

1. Attached is a markup of the map which Riaz sent. Please verify that 

the identified locations are correct. In the future, please provide 

figures showing locations of interest. In addition, this figure does 

not show the confirmation samples taken in May 2007 around areas 

represented by SB-44, SB-47, SB-45, SB48, and SB-54. Please include 

000499
these sample locations and include the SRG values for Zinc (200mg/kg) 

and BAP (7.8 mg/kg). 

2. Please indicate that the soils will be staged on the southern 

portion of the site property and will be stabilized and disposed in the 

WWR area during remedial action. 

3. Please provide a proposed schedule of activity as well as an 

assurance that this will not delay or affect the upper intermediate 

aquifer characterization activity. Please include field schedule and 

report submittal schedule. 

4. Sampling of the CS-10 locations will be grab or composite? Will be 

taken at what depth? 

5. What is 'HNU type instrument'? 

6. During excavation please make efforts to GPS sample locations and 

extent of soil removal (horizontal and lateral) so that these activities 

can be documented in the final report and shown accurately on maps. 

7. For future reference, please provide the actual acreage, legal 

description, and land parcel map for GCC. My understanding is that this 

is a 16 acre parcel rather than a 20 acre parcel. 

(See attached file: 20070810125941annotated.pdf) 

Katrina Higgins-Coltrain 

Remedial Project Manager 

USEPA Superfund 

Louisiana/New Mexico/Oklahoma Team (6SF-RL) 

1445 Ross Avenue, Suite 1200 

Dallas, TX 75202 

214-665-8143 

214-665-6660 (fax) 

"Ahmed, Riaz 

\(Houston,TX-US\ 

)" To 

<RAhmed@TRCSOLUT Katrina Coltrain/R6/USEPA/US@EPA, 

IONS.com> <David.Mayerson@state.nm.us>, 

<allan.pasteris@state.nm.us>, 

08/10/2007 03:13 "Clark, David C \(Topeka\)" 

PM <David.Clark@bnsf.com> 

cc 

"Ahmed, Riaz \(Houston,TX-US\)" 

<RAhmed@TRCSOLUTIONS.com> 

Subject 

Sampling at GCC Property 

000500
Here is the proposed plan of action to remove additional impacted soils 

from GCC area. If you all agree with the proposed plan, we would like to 

accomplish first task ASAP, even before we mobilize on August 20. 

BNSF is in the process of selling a 20 acre L shaped parcel north of the 

fence to GCC Premium Transloaders (GCC). At locations, GCC observed 

several north-south linear surface expression of asphaltic like 

material. GCC requested that BNSF remove this material. The removal of 

this material was completed soon after. During this removal process , 

BNSF noted that certain areas seemed impacted based on visual and odor 

observations. The impacted soil was also removed at the same time. Upon 

removal of all material, 10 composite sample were taken to verify that 

the bottom of the excavation met soil remediation goals(SRG). The 

attached figure shows areas of excavation and composite samples taken 

for verification purposes. Verification sampling showed three samples to 

exceed SRG. They are CS-G04 with Zinc at 372mg/kg, CS-G06 with BAP at 

26.8 and CS-G10 with zinc at 215. As evident from the attached figure, 

CS-G04 and CS-G06 are not composite samples. CS-G10 is a composite of 

three samples. 

First task will be to sample CS-G10-1, CS-G10-2, and CS-G10-3 for zinc 

and identify location(s) that have zinc above 200 mg/kg. 

Second task will be to step out 10 feet ( can be adjusted in field based 

on visual or odor observations) in all four direction . Excavate the 

entire area i.e. 20 ft by 20 ft to a depth of three feet. A soil sample 

will be taken at the center of each wall and analyzed for BAP in case of 

CS-G06 and zinc for others. Step out will be continued till we obtain 

data that shows soil samples to be blow SRG. 

Since these areas have already been excavated to a certain extent, the 

following procedure will be used to determine the depth of excavation:1- 

Around each excavation at least three elevation measurements will made 

on undisturbed land.2- The average of the three measurements will be 

used as reference elevation for that location.3- Reference elevation 

minus three feet will be used as the target elevation of excavation at 

that particular location. 

All work will be done as per Site Health and Safety plan and a HNU type 

instrument will be available at the site. 

[attachment "20070810125941.pdf" deleted by Katrina 

000501
Coltrain/R6/USEPA/US] 

000502