MtA, Inc. 2225 Drake Avenue, Suite 8 Huntsville, Alabama 35805 Remediation of Sites in the U.S. Virgin Islands and Puerto Rico (Contract DACA87^92-D-0147 Delivery Order 0003 SITE CHARACTERIZATION FORMER FORT SEGAMA, U.S.V.I. PHASE I REMEDIAL INVESTIGATION (RD REPORT U.S. Army Engineering Division, Huntsville ATTN: CEHND-CT-D (A. Prince) P.O. Box 1600 Huntsville, Alabama 35807-4301 200.1e I02VI097701 03.10 0001 10 January 1995 5100-003 2225 Drake Avenue, S.W. Suite 8 HontsTllle, Alabama 3580S (205) 883-4451 Commander U.S. Army Engineer Division, Huntsville ATTN: CEHND-CT-D/A. Prince P.O. Box 1600 Huntsville, AL 35807-4301 Subject: Revised Phase I Remedial Investigation (RI) Report, Former Fort Segarra, U.S.V.I. Dear Ms Prince: The enclosed Phase I Remedial Investigation (RI) Report is submitted in accordance with Delivery Order 0003, Contract DACA87-92-D-0147. This report has been revised based on comments received from CEHND using CEHND Form 7. Annotated copies of the completed CEHND Form 7's are also enclosed. This report has also been distributed to other agencies per requirements in the delivery order. Copies of the CEHND Form 7's, however, were not provided to agencies outside of CEHND. Please feel free to contact me or Mike Moran at 883-4451 regarding this submission. Sincerely, MTA, Incj obart B. Noll Corporate Operations Officer encl as TABLE OF CONTENTS 1.0 INTRODUCTION 1 1.1 Objective. 1 12 History 1 2.0 REPORT FORMAT. 1 2.1 Basic Report. 1 12 Maps. 1 13 Reid Log Books. 1 2.4 Video Tapes. 1 3.0 EXPOSURE DATA. 2 3.1 Manhours. 2 32 Vehicle Mileage. 2 33 Flight Data. 2 4.0 OPERATIONS 2 4.1 Flamingo Bay Warehouse and T-anHfill Area. 2 12 Tamarind Tree Bay 2 13 Test Area 4. 2 4.4 Test Area 5 3 4 £ Test Area 6. 3 4.6 Test Area 8. 3 4.7 Sampling, 3 4.8 UXO/OEW Found. 4 5.0 SUPPLIES AND EQUIPMENT 4 6.0 WEATHER ANT) TERRAIN 5 6.1 Weather 5 62 Terrain. 5 7.0 QUALITY CONTROL 5 8.0 SITE SAFETY 5 8.1 Safety Briefing iTailgatei 5 8.1 Safety Training. 5 $2 Safety Moniioring. 5 S3 Personal Protective Equipment (PPE) 5 9.0 IMPACT OF OPERATIONS. 6 9.1 EcologicaL 6 92 EnvironineniaL 6 10.0 SUMMARY & RECOMMENDATIONS. 6 ii 10.1 Summary 102 Recommendations. ANNEX A MAPS ANNEX B SENIOR UXO SUPERVISOR LOG BOOK ANNEX C TEAM 1 LOG BOOK ANNEX D TEAM 2 LOG BOOK ANNEX E SITE SAFETY OFFICER (SSO) LOG BOOK ANNEX F CONTRACTOR'S SCOPE OF WORK (SOW) 6 6 ANNEX G GEOPHYSICAL SWEEP PROCEDURES ill ' • • ! ; SITE CHARACTERIZATION FORMER FORT SEGARRA, U.S.V.I. PHASE I REMEDIAL INVESTIGATION (RI) REPORT 1.0 INTRODUCTION 1.1 Objective. MTA, Inc. of Huntsville, Alabama was awarded Contract DACA87-92-D- 0147, Delivery Order 0003 on 31 March 1993 to perform site characterization and debris removal operations at Former Fort Segarra, Water Island, U.S. Virgin Islands. MTA mobilized on 14 March 1994 and completed all operations on 9 June 1994. Wyle Laboratories of Norco, California was a subcontractor to MTA for work under this delivery order. 13 History. Former Fort Segarra on Water Island was the site of the Toxic Storage Yard of a Department of the Army chemical weapons test program called the San Jose Project from mid 1948 to mid 1950. This site was also the location of testing of persistent and lethal chemical agents during this time. The project moved to Dugway Proving Grounds, Utah in late 1950 and all operations ceased at Former Fort Segarra. There is only one post 1950 recorded event which related to the test program on Water Island. In 1966 during construction of a warehouse on Water Island near Flamingo Bay, two bombs were uncovered. These were identified as M70 and M78 type bombs and were vented by a U.S. Navy Explosive Ordnance Detachment with no documented release of agent, although eye witness accounts and military records differ. 2.0 REPORT FORMAT. 2.1 Basic Report. The Basic Report consists of those items shown in the Table of Contents. 22 Maps. Reduced copies of maps for Test Area 5 (TA5), Test Area 4-2 (TA4-2), and Flamingo Bay Warehouse and Landfill area (FB-1, FB-2, and FB-3; one map) are included in this report. These are copies of the latest maps submitted to the Anomaly Review Board (ARB). Reproducible copies of full size maps are provided to the ARB as needed in the course of review. 23 Field Log Books. Copies of the Senior UXO Supervisor, Team Supervisors and Site Safety Officer (SSO) field log books are included in annexes to this document (see Table of Contents). Original log books were submitted with earlier reports, per the contractor's scope of work. 2.4 Video Tapes. Two video tapes were submitted to U.S. Army Engineer Division, Huntsville (CEHND-PM-OT) with the draft final report. 3.0 EXPOSURE DATA. 3.1 Manhours. Total number of man-hours worked on site: 6,501.5. 32 Vehicle Mileage. Total motor vehicle mileage: 2,458. 33 Flight Data. No flight operations were conducted during this project. 4.0 OPERATIONS 4.1 Flamingo Bay Warehouse and Landfill Area. MTA investigated this area in the latter stages of this investigation because of heavy debris and vegetation. MTA personnel discovered a vented 1 ton container in the FB-2 area which appeared to be from the San Jose Project. In addition, a local worker told the U.S. Army Corps of Engineers site representative that he was present during the demobilization of the San Jose Project at Flamingo Bay in 1950 and saw where projectiles were buried in what is now a linear depression which looks like a covered ditch. The Technical Escort Unit took a soil sample from the 1 ton container. As of this writing (8 July 1994), the U.S. Army Engineer Division, Huntsville has not received a report of the results of this soil sample. The 1 ton container remains on site in FB-2 pending disposition directives from the U.S. Army Corps of Engineers, Huntsville Division. Magnetometer sweeps of FB-2 gave almost a continuous "ring off1 which indicates a large number of anomalies in this area of Flamingo Bay warehouse and Landfill Area. MTA also found what appeared to be numerous buried automobiles which earlier investigation reported were used as fill for the extension of the shoreline in the 1960's. No further investigation is anticipated or recommended for this area. Magnetometer sweeps of FB-1 and FB-3 indicated a few anomalies but appeared to be random metal objects and gave no indication of buried UXO or UXO related material. MTA does not recommend intrusive investigation in FB-1 or FB-3 for this reason. 42 Tamarind Tree Bay. Surface investigation of Tamarind Tree Bay indicated no suspected buried UXO or UXO materials. The brown unvegetated area near the beach is probably the beginnings of a salt marsh according to Corps of Engineers and local resident opinion. No OEW or OEW related scrap was found in this area. MTA does not recommend additional investigation of Tamarind Tree Bay. 43 Test Area 4. MTA conducted a surface investigation of Test Area 4-1 located between the dirt road and the shore line. Test Area 4-1 was relatively clear of debris and heavy vegetation. Magnetometer sweeps indicated some anomalies but did not give indications of any buried UXO or UXO related materials. MTA does not recommend intrusive investigation in Test Area 4-1. MTA had to clear the heavy debris and 78 junk vehicles in Test Area 4-2 before any surface investigation could continue. The debris and 78 junk vehicles were transported off of Water '• t. Island and disposed of at the St. Thomas public landfill after coordination with St. Thomas authorities. MTA drained and segregated the automotive fluids and junk batteries. MTA will dispose of these automotive fluids and junk batteries in accordance with U.S. Army Engineer Division, Huntsville directives. Local hazardous waste disposal service companies do not exist in the U.S. Virgin Islands. Consequently MTA had to contact such companies on Puerto Rice and most were not responsive to MTA's request for cost proposals to dispose of the automotive fluids and junk batteries. Only Crowley Environmental Services responded with a partial unit price quotation which indicated that the cost of disposing of these wastes will be significant. At the direction of the U.S. Army Corps of Engineers site representative, MTA has stored these wastes temporarily at Test Area 4-2 with suitable protection from the elements. (Note: since submission of the draft report, MTA has subcontracted with Vanguard Environmental Services for disposal of the material. Action is ongoing as of this submission). The surface investigation of Test Area 4-2 indicated large number of anomalies of a suspicious nature which could be buried UXO or UXO materials. In addition, MTA found an 8 foot diameter circular area in TA 4-2 which was sunken and had no vegetation growing in it. This was most unusual since the surrounding area was covered with thick tropic vegetation. Magnetometer readings indicated almost a continuous response in the circular area. No OEW or OEW related scrap was found in the area. MTA recommends intrusive sampling of the area (per findings of the ARB), and specific intrusive investigation of the circular depression area in Phase II. 4.4 Test Area 5. MTA had to remove substantial heavy tropic vegetation and consolidate approximately 90 cubic yards of household debris at the concrete structure before any substantive surface investigation could be accomplished. The surface sweeps indicated a large number of anomalies, a subset of which may be classified as suspect buried UXO or UXO material. While there is less probability of finding buried UXO or UXO materials in Test Area 5 than in Test Area 4-2 or Test Area 4-2 Circle, MTA recommends conducting intrusive investigation in Test Area 5 because of the anomalies found and the history of the use of TA-5 for testing during the San Jose Project. No OEW or OEW related scrap was found in the area. MTA recommends intrusive sampling of the area (per findings of the ARB) 4.5 Test Area 6. MTA conducted a surface investigation of Test Area 6 and found no anomalies which would indicate buried UXO or UXO material. No OEW or OEW related scrap was found in this area. MTA does not recommend Test Area 6 for intrusive investigation. 4.6 Test Area 8. MTA conducted a thorough surface investigation of Test Area 8 and found no suspect anomalies. No OEW or OEW related scrap was found in this area. MTA does not recommend intrusive investigation of Test Area 8. 4.7 Sampling. MTA conducted 9 sampling operations in accordance with the sampling plan. According to recent feedback from the U.S. Army Engineer Division Safety Office, all 9 samples were properly transmitted through the chain of custody records and had no indication of Chemical Warfare Material (CWM) contamination. The TEU sampled the soil in the 1 ton container at FB-2. All samples sent off site for analysis produced negative results. 4.8 UXO/OEW Found. The only UXO or UXO related item found during the project was the 1 ton container in FB-2. Container was examined and sampled. Container presented no explosive or CWM hazards. 5.0 SUPPLIES AND EQUIPMENT MTA used the following major equipment during this project: 6 Schonstedt Magnetometers 1 Front End Loader 1 Fork Lift, Rough Terrain 1 Stake Bed Truck, 1/2 ton 2 Suzuki 4 x 4 light trucks 4 Homelite Brush Cutters 8 Motorola Radios MT1000 1 Camera Recorder, VCR 1 Camera 35mm 1 Photo Ionization Detector 2 Gas powered brush trimmers Various watercraft for personnel, cargo, debris, and emergency transport Multiple 20 cubic yard dumpsters Common hand tools Various respirators and personal protective equipment. Various expendable supplies (paper, pencils, tape, plastic bags, etc). 6.0 WEATHER AND TERRAIN 6.1 Weather. The weather was not a significant factor in the execution of the work under this delivery order. However, during the month of May, the temperature in the afternoon at the work sites FB-2 and TA 4-2 did curtail some late afternoon work. UXO Supervisors were especially vigilant in observing their work crews and prevented many heat related injuries by insisting on frequent rest and water breaks. The location of many of the works sites was sheltered from the prevailing winds in the afternoon. 6.2 Terrain. The terrain of Water Island is characterized by a rocky shoreline except for a few beach and landings suitable for small watercraft. The island runs northeast to southwest with a ridge line down the middle of the island. The work sites were generally flat except for Test Area 6 which had a rough surface bisected by a cut. 7.0 QUALITY CONTROL MTA implemented the Quality Control Plan which included careful verification of all temporary monuments, location of sample points and anomalies. The MTA Quality Control Specialist worked closely with MTA supervisors and the Corps of Engineers representatives to ensure the accuracy of all findings. Quality Control documentation is contained in the SSO log book. 8.0 SITE SAFETY MTA implemented the site safety plan and rigorously enforced the requirements of that plan. Every worker read and understood the safety plan and supported it throughout the work on Water Island. 8.1 Safety Briefing (Tailgate). MTA conducted a daily tailgate safety briefing to emphasize specific safety challenges for the day and to gather feedback from the crews about current safety procedures. These daily safety meetings are documented in the appropriate log books. 8.1 Safety Training. MTA conducted safety training on every piece of equipment used on the job. MTA made a special point of emphasizing the need for care while working in the proximity of heavy equipment. 8.2 Safety Monitoring. The Technical Escort Unit provided continuous monitoring of all operations during the work on Water Island. In addition, MTA provided a Photo Ionization Detector (PID) while conducting the surface investigation in Test Area 4-2. 83 Personal Protective Equipment (PPE). MTA provided all the appropriate PPE to the work force on this project to include respirators with the proper canisters, safety goggles, hard hats, gloves, steel toe shoes, long sleeve work shirts and long trousers. In addition, MTA provided 5 minute escape bottles for the crew for rapid evacuation from the work site. 9.0 IMPACT OF OPERATIONS. 9.1 Ecological. No significant ecological impacts resulted from operations conducted in this phase of the investigation. 92 Environmental. Test Area 4-2 was significantly improved during the operation via removal of car bodies and associated debris. Test Area 5 and Flamingo Bay area 2 were also improved by removal and/or internal movement of debris and materials. 10.0 SUMMARY & RECOMMENDATIONS. 10.1 Summary. Site Characterization actions and results during this phase provided no basis for further investigation of TA6, TA8 or Tamarind Tree Bay. Results from activities in TA4-2, TA5 and FB-2 indicated need for further investigation, of which sampling of anomalies appeared to be the most appropriate means. The circular depression in Test Area 4-2 and the suspected pit in Flamingo Bay Area 2 warrant specific intrusive investigation. 10.2 Recommendations. a. Recommend intrusive investigation of the circular depression in Test Area 4-2 and the suspect pit area near the discovered 1-ton container in FB-2. In addition, approximately 10% of the anomalies, hot grids and hot areas in FB-2, TA4-2 and TA5 should be intrusively sampled in order to support future decisions regarding the effects of military activities on Water Island. b. MTA recommends that subsequent activities be supported with on-site facsimile, copying and automation capabilities. These capabilities would greatly improve communications, recording of information among key organizations and to facilitate contact with local suppliers and subcontractors. ANNEX A MAPS E 1.1S7.3I0 | N U1.K» I 1,H7.»OO NOTE: Circled "S" numbers represent recommended sampling locations for Phase II of the Site Characterization. These are under review of the ARB as of 28 December 1994. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 |N (31.100 E i.itT.liO E 1.HT.M0 mta, inc. 12 CM 1»94 APPROVED I T : M. Mor«n J. Thomai DACA87-92-D-0147, D.O. 003/D.O.003 FORMER FORT SEGARRA, WATER ISLAND, U.S.V.I DWO. NO. FLAMINGO BAY-2 I N 01.850 E 1.187.850 1 N 83.650 E 1.108.400 \ \ V 1 1. |2 3 4 5 6 7 8\ 9i 10 11 12 13 14 15 16 17^18 19 20 SUSPECT CIRCULAR | DEPRESSION! WATER VALVE OUTLETS NOTE: Circled "S" numbers represent recommendc ' sampling locations for Phase il of the Site Characterization. These are under review of the ARB as of 28 December 1994. mta, inc. 1": ~ SO' APPROVED BY: M. Moran J. Thomas DACA87-92-D-0147, D.O. 003/D.0.003 FORMER FORT SEGARRA, WATER ISLAND, U.S.V.I owe. NO. TEST AREA 4-2 > N 631.200 E 1,108.400 1 N 831.850 E 1.188.650 > \ \V + + . E 1.188.550 " ' \ r ^ ^ ^ ^ GRID F \ ! M R MOT.AREA r - - . \ ">° &.\ \ HOTARE/j \ ~ ^ \ HOT AREA V. \ ME HOT ARtA ^ • • . ' ' - - < i. X vM(*T AflEA ' M4 \ Y \ 4- GRID G \ v HOT GRID \ \ X J\^^VMV " ^ \ \ HOT AREA \ ' ~>-\ ^ ^ GRID D « ^ ^ TRASH AH6A ^ / V - " / s A -~^^~WT»IE<—-— P\ GRIDB M \ \ *• ~~—-^t^^^ \ \ M 2 HOT AREA y \ \ / \ \ GRID A HOJ^ / \ HOTtoEA \ _ _ _ _ / _J_ MU GRID H \ H°T GR/D \ M8 GR/DE H0T GR/D GRID C / ^ T GRID / Mo / / 4- / N 831.450 / , E 1.188.000 J J _1_ _ . 4 E 1.180.000 I SCALE: 0»T£: 1 2 ——— 1 - ORIGINAL PLANNED AREA OF GRID BOUNDARIES - HOT AREA BOUNDARIES : INTEREST MONUMENTS L OTHER FEATURES mta, inc. I'^SO1 Oct 1994 APPROVED »Y: M. Moran DRAWN IY: . _ . J. Thomas «EVI»ED: 29 D«C 1994 DACA87-92-D-0147, D.O. 003/D.O.0O3 FORMER FORT SEGARRA, WATER ISLAND, U.S.V.I DWG. NO. 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LL -i>, Pi )C/ 5 S ')3D iLiaJ'CL - - : r I I c'^C "DcuJ-t> £ . !G 'a-*-<-^aji-r- 1.-CX <-v.v- e •?• A-* — v- C_ ' - "i \ ^ t ^ 'c<& C^C \ A Q '•> 5 t A c u CL v- \ \ iL c^ •<-<- Lv - c • • ^ • 0, in3^ nx-cvc^uv C -- C- \ " ' > ' ; C Li* C LI^V. i CtU-U uuu- i^O /'Cl. .^ Vc KJC -'v>- — ^ - U V, s tor v.~ V T-V • -VJU s t p-t vQ-fcASovo*-*^ yax'^Scu^V Of58: P l b - P T lQ\ r h. ^ \p Q fv|G;c,_ QQ_L^pU k,Jl Gfr |QQ. cv gvs ^ ViS'.-l- I Q |H\ ^ r M - W A W f \'<;-V en- T 101 A-Ay%-.^ \ . . tau+or_ -Ve fa - i . -CW.' i 4 5- precautions associated with the area. e. Accident procedures. f. Climatic precautions. g. Other situation spec5c instructions. 4.8.5. Equipment Check. UXO personnel will perform equipment checks on subsurface sweep equipment immeciaieiy after the safety briefing. Equipment operability and support requirement ; e ^ spare batteries) will be inspected in the process. Operational condition of each instrument will be annotated in the :og book. The following detection equipment wiH be used for this project: a. Schonstedt GA-51B ~2B. The Schonstedt GA-52B "2B Heii-Fiux Magnetometer is capable of locating a 1-5-mm projectile at a depth of five (51 feet and win be the primary instrument used by ^ie team members to locate subsurface UXO OEW. The Mood GA-52, ~2B detect the magnetic field of a ferromagnetic object and responds to this difference in tie magnerx: field between two sensors spaced 20 inches aoart. The response consists c: a change in the frequency signal that is emitted by a loudspeaker. b. Other instruments that —eet the criteria established in the SOW may be used in the interest of safety and/or quality of effort. All such instruments wiil be approved by USAEDH safety personnel prior to employment on site, 4.8.6. Performing UXO Sweeps. Sweep teams shall consist of a UXO Supervisor, a UXO Specialist and a UXO Assistant. Teams will be assigned to sweep lanes which are separated by one lane minimum (more at the discretion of the Senior UXO Supervisor). Two members of each team wifl proceed down each lane, simultaneously conducting visual and magnetometer sweeps and marking ordnance locations. The UXO Specialist and the UXO assistant of each team will alternate as the magnetometer operator and flagman* en each team. UXO Supervisors are responsible for recording ordnance and magnetometer detections, maintaining safe intervals between teams, and confirming OEW identifications when necessary. UXO Supervisors will also insure i-KFc coverage of the lanes assigned UXO Supervisors will remain several meters behind other team members, but may rotate magnetometer and flagman* duties with other team members in the interest of health safety. Sweep lanes will stop and stan individually. Stopping, starting, and breaks wifl be controlled by UXO Supervisors. Subsurface sweeps will be conducted to the depths identified in the delivery order. 4.8.7. Identifying and Marking UXO. OEW. UXO/OEW will be identified by at least two UXO twrhnirian* Identification wQl include nomenclature, location and condition (ex, armed, unfrred damaged, burnt etc). Nomenclature and location will posted on site maps; other information wifl be recorded on the dairy summary/inventory forms being used on site. Suspected UXO items which cannot be identified will be photographed and the photos sent to CEHSD. UXO/OEW wfll be marked with bicyde flags. Flags will be offset far enough from UXO/ OEW so that they will not come in contact with the UXO if knocked over. 4.3.S. Marking Subsurface Anomalies. Magnetometer detected anomalies wifl be marked with bicyde flags in the same manner as UXO/OEW was marked during surface sweeps. Location of subsurface items wifl be recorded in the log book and marked as accurately as possible on a map of the site. 4.8.9. Identifying &. Handling Inert Items. OEW Related Scrap. Inert items and scrap wifl be examined by at least two UXO qualified personnel, classified as OEW or non-OEW scrap and the absence of explosives verified- See Annex I (DRMO Turn-in Plan). 4.8.9.1. Handling Inert Items. Location and nomenclature of inert items wfll be recorded in the site log book. Inert items wifl then be moved to the inert segregation point near the disposal area. Iiems requiring venting wfll be separated form items not requiring venting. 4.8.9.2. Handling OEW Related Scrap. Scrap that can be moved without the use cf heavy equipment wfll be consolidated near established site access routes to aid # in iaier coilecuc~ effcns. Only UXO qualified personnel will handle OEW related scrap. Scrap which is ico iarge cr heavy, or cannot otherwise be reeved wHi be marked and recorded for pest sweep removal 4.8.10. Non-OEW Scrap. Non-OEW related scrap will be cciiected at a site approved by the CEHND cn-site representative for rum-in zz iocai authorities. Scrap that can be moved wiihoui the use of heavy equipment will be consoiidated near established site access routes to aid in later collection efforts. Non-OEW related scrap areas will be iocaied far enough from OEW related scrap areas to prevent confusion and mixing of material Non-UXO qualified personnel may handle OEW' related scrap. Scrap which is too large or heavy, or cannot otherwise be moved wOl be marked and recorded for cos sweec removal # #