•S300 Lee Highway Fairfax, Virginia 22031-1207 703/934-3000 ICF TECHNOLOGY INCORPORATED October 19, 1988 Dr. Walter Lee Project Manager U.S. Environmental Protection Agency, Region III 841 Chestnut Building Philadelphia, PA 19107 Re : Consent Agreement and Order Docket No. III-86-12-DC Scovill Site at Montross, Virginia Dear Walter: The purpose of this letter is to transmit soil data which we obtained subsequent to our September 19 letter report to you. In accordance with our recommendation in that letter, ICF Technology resampled soils in the old pond in order to verify the presence of elevated concentrations of lead that had been reported in an initial sample; viz., TCLP of the 0-6 inch composite sample from the west side of the old pond bottom (collected on August 26) was reported to have a TCLP concentration of lead of 3,200 ug/1. On October 5, ICF Technology collected a composite sample from the west side of the old pond using a hand auger. Soils were taken from the same five grid units used on August 26 and from locations as close as possible to the original auger holes. The sample was then placed in an ice filled cooler and submitted to Versar for TCLP analysis. As shown in the attached laboratory data report, no lead was detected in the October 5 sample. This resampling result, in conjunction with the fact that no other elevated concentrations of lead were detected in the old pond, indicate to .us that lead is not a problem in the old pond soils. The result confirms our suspicions that the 3,200 ug/1 concentration was an anomaly, perhaps occurring during laboratory analysis. As a result, no additional soil removal is proposed for the old pond prior to backfilling. I am requesting your approval of this decision as soon as possible as we intend to proceed with earthwork at the site sometime in the next week. Sincerely yours, Gary N. /Dietrich Senior Vice President Attachments cc: Charles Perry ARi*OI327
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ICF TECHNOLOGY INCORPORATED · ICF TECHNOLOGY INCORPORATED October 19, 1988 Dr. Walter Lee Project Manager U.S. Environmental Protection Agency, Region III 841 Chestnut Building Philadelphia,
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•S300 Lee HighwayFairfax, Virginia22031-1207
703/934-3000
ICF TECHNOLOGY INCORPORATEDOctober 19, 1988
Dr. Walter LeeProject ManagerU.S. Environmental ProtectionAgency, Region III
841 Chestnut BuildingPhiladelphia, PA 19107
Re : Consent Agreement and OrderDocket No. III-86-12-DCScovill Site at Montross, Virginia
Dear Walter:
The purpose of this letter is to transmit soil data which we obtainedsubsequent to our September 19 letter report to you. In accordance with ourrecommendation in that letter, ICF Technology resampled soils in the old pondin order to verify the presence of elevated concentrations of lead that hadbeen reported in an initial sample; viz., TCLP of the 0-6 inch compositesample from the west side of the old pond bottom (collected on August 26) wasreported to have a TCLP concentration of lead of 3,200 ug/1.
On October 5, ICF Technology collected a composite sample from the westside of the old pond using a hand auger. Soils were taken from the same fivegrid units used on August 26 and from locations as close as possible to theoriginal auger holes. The sample was then placed in an ice filled cooler andsubmitted to Versar for TCLP analysis. As shown in the attached laboratorydata report, no lead was detected in the October 5 sample.
This resampling result, in conjunction with the fact that no otherelevated concentrations of lead were detected in the old pond, indicate to .usthat lead is not a problem in the old pond soils. The result confirms oursuspicions that the 3,200 ug/1 concentration was an anomaly, perhaps occurringduring laboratory analysis. As a result, no additional soil removal isproposed for the old pond prior to backfilling.
I am requesting your approval of this decision as soon as possible as weintend to proceed with earthwork at the site sometime in the next week.
Sincerely yours,
Gary N. /DietrichSenior Vice President
Attachmentscc: Charles Perry ARi*OI327
INC.
October 17, 1988
Ms. Claudia BrandICF Technology, Inc.9300 Lee Highway, Room 914Fairfax, Virginia 22031-1207
Reference: Versar Job No. 996.17
Dear Claudia:
Enclosed please find the analytical data for the analysis of one•sludga sample received at Versar on October 7, 1988.
Should you have any questions, please call me at (703) 642-6760.
Sincerely,
Mark R. HammerslaProject CoordinatorLaboratory Operations
MRH/mar
Enclosure
ftRb-01328
6850 VERSAR CENTER • P.O. BOX 1549 • SPRINGFIELD, VIRGINIA 22151 • TELEPHONE: (703) 750-3000 • TELEX: 901125
INC.
ANALYSIS NARRATIVE
t: 996.17.1-10me: ICFMontrossOctober 13, 1988
This batch of one soil was received on October 7, 1988 fornination of lead. The sample was extracted on October 1Oding to Toxicity Characteristic Leachate Procedure (Federalter, Vol.51 #216,Part 268>. The extract was digested andzed by ICP on October 12. Both digestion and analysiswed methods outlined in SW-846, 3rd. Edition. As requested,was performed on the sample. All blanks were clean and allstandard recoveries were within 1054 control windows.
Prepared by: "" ." . I i., K
Danette DrewLaboratory Operations
RSAR CENTER • P.O. BOX 1549 • SPRINGFIELD, VIRGINIA 22151 • TELEPHONE: (703) 750-3000 • TELEX: 901125