INERT Sere anTEreMErreet, RTE me eneee FCRE LTC Prall 2% Nov 7% FACT SHEET - SUBJECT: Enjebi (Janet) Surface Contamination Status PURPOSE: To provide current status of cleanup of surface contamination of Enjebi (Janet). BACKGROUND: Cleanup of Enjebi to meet Condition C (40 pCi/gm) (Residence use) has been considered by DNA to be a desirable goal. JIG tasked on 15 May 78 to excise FEnjebi "...with no specific lower level, but will concentrate on cleaning toward 40 pCi/g as maximum surface level." DISCUSSION: A single lift of nominal 6" depth has successfully reduced con- tamination to well below 40 pCi/gm in each area identified by DOE. The tech- nique of removing the areas of highest contamination first in combination with fine survey have resulted in lower volumes of soil to be removed. Ini- tial estimate to reach 40 pCi/pm was 41,500 cy (3 - 4 May Conf), later re- vised by ERSP to be 54,300 cu yd. Current estimate is 50,833 cu yd. This estimate is based on actual soil removed to date and the current estimate of soil remaining to be removed. (fiyures do not include 1300 cy subsurface excision requirement). F STATUS: EVENT cy DATES — Excision 60 pCi/gm 2380 6 Jul 78 - 21 Jul 78 and 15 Aug 78 - 18 Aug 78 Excision 50 pCi/gm 16,492 14°Jul 78 - 14 Aug 78 Excision 45 pCi/gm 18,288 24 Aug 78 - 21 Oct 78 Excision 40 pCi/gm Est 13,473* 21 Oct 78 - Est 2 Dec 78 * Fine grid (25 m) Imping by ERSP in early November 1978 revealed new areas requiring excision even though 50 m grid Imp data and kriging indicated with a 70 percent confidence that excision would not be required. This increase was approximately 5200 cu yds. Additionally, 29 "hot spots" were identified as being over 40 pCi/gm. These "hot spots", encompassing one each Imp read- ing in a given area, are not currently programmed for excision. Although it is estimated that all contaminated soil greater than 40 pCi/gm will be excised by 2 December 1978, there remains approximately 13,000 cy in stockpile to be transported to Runit. late February 1979. TAEC This removal is estimated to be completed in