Received: from mintra02.rtp.epa.gov ([134.67.221.154]) by epahub11.rtp.epa.gov (Lotus Domino 653HF66) with ESMTP id 2007042314430735-1330630 ; Mon, 23 Apr 2007 14:43:07 -0400 Received: by mintra02.rtp.epa.gov (Postfix) id A3C79444A9; Mon, 23 Apr 2007 14:42:01 -0400 (EDT) Delivered_to: coltrain.katrina@epamail.epa.gov Received: from mintra02.rtp.epa.gov (localhost.localdomain [127.0.0.1]) by localhost (Postfix) with SMTP id 8EC61444EB for <Coltrain.Katrina@epamail.epa.gov>; Mon, 23 Apr 2007 14:42:01 -0400 (EDT) Received: from mseive02.rtp.epa.gov (mseive02.rtp.epa.gov [134.67.221.150]) by mintra02.rtp.epa.gov (Postfix) with ESMTP id 71AFF444E2 for <Coltrain.Katrina@epamail.epa.gov>; Mon, 23 Apr 2007 14:42:01 -0400 (EDT) Received: from mseive02.rtp.epa.gov (localhost.localdomain [127.0.0.1]) by localhost (Postfix) with SMTP id 620401DC00E for <Coltrain.Katrina@epamail.epa.gov>; Mon, 23 Apr 2007 14:42:01 -0400 (EDT) Received: from outbound3-cpk-R.bigfish.com (outbound-cpk.frontbridge.com [207.46.163.16]) by mseive02.rtp.epa.gov (Postfix) with ESMTP id 82F061DC004 for <Coltrain.Katrina@epamail.epa.gov>; Mon, 23 Apr 2007 14:42:00 -0400 (EDT) Received: from outbound3-cpk.bigfish.com (localhost [127.0.0.1]) by outbound3- cpk-R.bigfish.com (Postfix) with ESMTP id E222C99236A; Mon, 23 Apr 2007 18:41:59 +0000 (UTC) Received: from mail59-cpk-R.bigfish.com (unknown [10.2.40.3]) by outbound3- cpk.bigfish.com (Postfix) with ESMTP id 27AA0800050; Mon, 23 Apr 2007 18:41:59 +0000 (UTC)Received: from mail59-cpk (localhost [127.0.0.1]) by mail59-cpkR.bigfish.com (Postfix) with ESMTP id 118EB11028F; Mon, 23 Apr 2007 18:41:59 +0000 (UTC) X_BigFish: V Received: by mail59-cpk (MessageSwitch) id 11773537192361_19428; Mon, 23 Apr 2007 18:41:59 +0000 (UCT) Received: from MAIL2.TRCSOLUTIONS.COM (mail2.trcsolutions.com [64.238.212.129]) by mail59-cpk.bigfish.com (Postfix) with SMTP id 8C0FB918050; Mon, 23 Apr 2007 18:41:58 +0000 (UTC) Received: from trc-mail5.TRC_WINDSOR.TRCSOLUTIONS.COM ([10.70.11.5]) by MAIL2.TRCSOLUTIONS.COM with Microsoft SMTPSVC(5.0.2195.6713); Mon, 23 Apr 2007 14:45:15 -0400 X_MIMEOLE: Produced By Microsoft Exchange V6.0.6603.0 MIME_Version: 1.0 Subject: Sampling at Locations SB44, SB45, SB47,SB48,SB54 PostedDate: 04/23/2007 01:45:15 PM$MessageID: <4A9B937431EF314390B59A5D38DD9DF2016ACFF1@trcmail5.TRC_WINDSOR.TRCSOLUTIONS.COM> X_MS_Has_Attach: X_MS_TNEF_Correlator: Thread_Topic: Sampling at Locations SB44, SB45, SB47,SB48,SB54 Thread_Index: AceF14eB2ysF6aVwTLCJ81X6MmhzqQ== From: "Ahmed, Riaz \(Houston,TX-US\)" <RAhmed@TRCSOLUTIONS.com> SendTo: Katrina Coltrain/R6/USEPA/US@EPA,"Morris, Susan, NMENV" <susan.morris@state.nm.us>,<David.Clark@bnsf.com> CopyTo: "Ahmed, Riaz \(Houston,TX-US\)" <RAhmed@TRCSOLUTIONS.com>,"Krueger, Pam\(Houston,TX-US\)" <PKrueger@TRCSOLUTIONS.com>,"Regli, Robert \(Albuquerque,NMUS\)" <RRegli@trcsolutions.com> X_OriginalArrivalTime: 23 Apr 2007 18:45:15.0894 (UTC) FILETIME=[888FD960:01C785D7] X_PMX_Version: 5.3.1.294258, Antispam-Engine: 2.5.0.283055, Antispam-Data: 2007.4.23.112634X_Perlmx_Spam: Gauge=IIIIIII, Probability=7%, Report='HTML_50_70 0.1, __CT 0, __CTYPE_HAS_BOUNDARY 0, __CTYPE_MULTIPART 0, __CTYPE_MULTIPART_ALT 0, __HAS_MSGID 0, __HTML_FONT_BLUE 0, __HTML_MSWORD 0, __IMS_MSGID 0, __MIME_HTML 0, __MIME_VERSION 0, __SANE_MSGID 0, __TAG_EXISTS_HTML 0' $MIMETrack: Itemize by SMTP Server on EPAHUB11/USEPA/US(653HF66|November 02, 2004) at 04/23/2007 02:43:07 PM,MIME-CD by Router on R6MAIL1/R6/USEPA/US(Release 6.5.5FP1|April 11, 2006) at 04/23/2007 01:42:03 PM,MIME-CD complete at 04/23/2007 01:42:03 PM InetSendTo: Coltrain.Katrina@epamail.epa.gov,.,. InetCopyTo: .,.,.
INetFrom: . SMTPOriginator: RAhmed@TRCSOLUTIONS.com RouteServers: CN=EPAHUB11/O=USEPA/C=US,CN=R6MAIL1/OU=R6/O=USEPA/C=US RouteTimes: 04/23/2007 01:43:07 PM-04/23/2007 01:43:08 PM,04/23/2007 01:42:02 PM-04/23/2007 01:42:03 PM $Orig: D7F577B028565D59852572C60066D32F RoutingState: $UpdatedBy: ,CN=EPAHUB11/O=USEPA/C=US,CN=R6MAIL1/OU=R6/O=USEPA/C=US Categories: $Revisions: 04/23/2007 01:42:03 PM $MsgTrackFlags: 0 DeliveredDate: 04/23/2007 01:42:03 PM $RespondedTo: 2

As per EPA’s e-mail of April 20, TRC will resample these locations previously sampled by GCC. We are resampling them as the detection limits for the samples were too high to make a conclusive decision on BAP exceedence. Since Zinc was below the soil SRG at these locations, analysis will be limited to semi volatiles that constitute the BAP Equivalent parameter.

SB 44 : GCC sample depth was 1 to 1.5 feet. The 2 to 2.5 depth sample at this location was below SRG. TRC will sample the soil in this area between depth of 1 to 1.5 feet or immediately below asphalt if asphalt depth is greater than this depth.

SB 45.: GCC sample depth was 1 to 1.5 feet. The next sample taken at 4 to 4.5 feet was below SRG. TRC’s sampling plan is same as SB44.

SB47: GCC sample depth was 0.0 to 0.5 feet. TRC will sample this depth unless it is an asphalt. In that case , we will sample at depth where we first encounter soil.

SB47B: GCC sample depth was 1.5 to 2.0 feet. TRC will sample at this depth.

SB48: GCC sample depth was 0.3 to 0.8 feet. The next sample at this location was at depth of 2.0 to 2.5 feet and it was below SRG. TRC willsample at this depth or at depth at which we first encounter soil.

SB54: GCC sample depth was 1.0 to 2.0 feet. TRC will sample at this depth as long as it is below the asphaltic material.

If field observations led us to believe that samples being submitted for analysis seem contaminated based on visual or odor considerations, TRC will take a sample at a lower depth to determine the depth of clean soil zone. This will avoid the need to come back and resample.

We are planning to obtain these samples on coming Thursday.

I trust this meets our understanding. Let me know if you have questions or comments. We will be asking Pace labs to keep the detection limits as low as possible so we can have a conclusive determination on presence of BAP equivalents.

Riaz$AutoSpell: 1In_Reply_To: <4A9B937431EF314390B59A5D38DD9DF2015653EB@trcmail5.TRC_WINDSOR.TRCSOLUTIONS.COM> $Mailer: Lotus Notes Release 6.5.1 January 21, 2004 $MessageID: <OF11398E6A.6C10CA27-ON862572C3.00528942- 862572C3.00559572@LocalDomain> INetFrom: Coltrain.Katrina@epamail.epa.gov PostedDate: 04/20/2007 10:35:42 AM Recipients: <RAhmed@TRCSOLUTIONS.com>,susan.morris@state.nm.us,David.Mayerson@state.nm.us,Da vid.Clark@bnsf.com MailOptions: 0 SaveOptions: 1 $AltNameLanguageTags: $StorageCc: $StorageTo: .,.,.,. $StorageBcc: InetCopyTo: InetSendTo: .,.,.,. AltCopyTo: InetBlindCopyTo: InheritedReplyTo: InheritedFrom: "Ahmed, Riaz \(Houston,TX-US\)" <RAhmed@TRCSOLUTIONS.com> InheritedAltFrom: "Ahmed, Riaz \(Houston,TX-US\)" <RAhmed@TRCSOLUTIONS.com> InheritedFromDomain: From: CN=Katrina Coltrain/OU=R6/O=USEPA/C=US AltFrom: CN=Katrina Coltrain/OU=R6/O=USEPA/C=US Logo: StdNotesLtr22 useApplet: True tmpImp2: DefaultMailSaveOptions: 2 Query_String: Principal: CN=Katrina Coltrain/OU=R6/O=USEPA/C=US SendTo: "Ahmed, Riaz \(Houston,TX-US\)" <RAhmed@TRCSOLUTIONS.com>,susan.morris@state.nm.us,David.Mayerson@state.nm.us,Da vid.Clark@bnsf.com CopyTo: BlindCopyTo: Subject: Map showing GCC boring locations and excavation by TRC. Encrypt: 0 Sign: 0 ReturnReceipt: 0 delTmpEncrypt: delTmpImportance: delTmpReturnReceipt: delTmpSign: EnterSendTo: "Ahmed, Riaz \(Houston,TX-US\)" <RAhmed@TRCSOLUTIONS.com>,susan morris,david mayerson,david clark EnterCopyTo: EnterBlindCopyTo: $RFSaveInfo: B035FA0DD35228AF852572BF0071B92F $UpdatedBy: CN=Katrina Coltrain/OU=R6/O=USEPA/C=US

David/Riaz, I am sending this email to summarize the conversation between Riaz and myself this morning.

1. We have agreed to call all of the NAPL located within the aquiferunits 'DNAPL'. An explanation of the occurrence of the DNAPL within the upper intermediate aquifer will support this notation.

2. The remedial action reports will be revised based on information obtained from the lower and upper DNAPL investigations. Because of this, the revisions will be submitted following completion of the upper intermediate investigation.

3. The map depicting the GCC samples vs. the soil excavation areas has been reviewed. There are five points that do not fall within the boundaries of the excavated areas. All of which have questionable high detection limits. All but two were taken at a depth of 1.0 feet below ground surface or greater. The two at shallow depths have lower detection limits, but when used to calculate the BAP equivalent, result in an exceedance of 7.8 mg/kg. It was agreed that confirmation samples would be taken in these areas to confirm the presence of COCs. Based on the results of these samples, a decision can be made regarding action.

SB-44 (200,000 ug/kg) SB-45 (34,000 ug/kg) SB-54 (35,200 ug/kg) SB-47B 1.5 to 2.0 (3550 ug/kg)

SB-47 0 to 6in (3450 ug/kg) SB-48 3 to 8in (3430 ug/kg)

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)! ( !

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SB-53 SB-52

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SB-43

SB-42

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SB-40

SB-39 SB-38

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Feet 3/22/2007 4:25:27 PM M:\GIS\Projects\60087\mxd\Site_location_map.mxd

4 221 Bal loon Park Rd A lbuq uer q ue, NM 87109 

### Sample Location Map

AT&SF Albuquerque Superfund Site Project No. 60087

Produced by TRC Advanced Mapping Staff - AJA