· - --9- Th Document Consists of ·I Pa· • No 1 of Copies Seri es A aruiat t a climen ts con•ist of two sets of three marked print each SECRET U 1 1 Ji M f o 1 IEST 8USHE0 1802 E I DU PONT DE NEMOURS COMPANY INCO RPORATED WILMINGTON DELAWARE E NG I NEER I NG DEPARTMENT t · information ftdJnr i This document con a s United State within t national delens n ' u 5 50' 31 ·r• of the Esoionage 'A · · the d d lls Iron ss on or and 3 e n tcnts in any manner lo an melation of ts co prohibited by law un3uthonzed person ts ADDRESS REPLY TO T HIS DEPARTMENT ATTEN T I ON OF February 12 19 44 Brig General L R Groves P o Box 2610 Washington D c HANFORD ENGINEER WORKS Dear General Groves When you were in Wilmington en Febnary 2 at a meeting in my office we discussed with you the Hanford construction schedule At that time we brought to your attention the approxi8 mate number of construction employees and camp personnel that would be on the site at the start of the first unit and the two additional uni ts It wili be necessary to maintain approximately this number of employees to meet the proposed schedule as discusged with you We are forwarding you herewith two sets of three marked maps indicating the number of people associated with our construction organization and the distance they will be working from the operating units A1 you will observe at the start ot the B unit there will be approximately 50 000 people within a 12-mile rad1us of the operating unit This large number of people working in so small · an area in pro imity to the operation has made us somewhat apprehens1Te and we would like to know from your office it you consider these distances as given on the attached maps safe with regard to the health hazard involved We would 11ke to be assured by your office that under conditions in which the performance of the op rat1ng unit did not proceed in a controllable manner and that all of the safety co troi mechanisms fail to function the distances as given on our map s are adequate protection for the health and safety of the employees i nvolved If these conditions as out lined are considered t o be satisfactory will you kindly sign th• three maps of one set and return them to this office CL · - · 'I CANCELLED 1 J I bJ-___ ----- r Commi si n Very t r u your s _· · c - G M Read ASST CHIEF ENGINEER _ I • I ''f j - MrfcoNSISTS OF PAG Sl 3 OF • ' COPIU SERIE A - 23 1 1 rcb 1941 I' 0 BOX 2610 WASHINGTON O C o 1 · IL • A au ' Chiet E •in or 6 J il ingtou Del_ __ _ E I du Pont Do r C p - r t· Ro d Tb' d o umeoi cm talna lnfanna ll a ffect q t t llUtior cJ de ti ·ac pf L Ur ited s l lw ntbin tho JC•- itMJ of tho Espion a e Act 50 IJ l i C 31 cxnd t 2 as amende i lbs trar L1 e·• o or the - all on of llll contenta In any mcmr er to IJl 1 Mllftlod r44 i Plohib11ad hr law I nc S o t _D_E C- --L'-7 A- S- SIF I Authority l lJ l Sa l 0