Project Description: The project scope included design, de-leading, hazardous material testing (EA), and erosion control implementation of Range C through F, and hazardous soil remediation for the Old Pistol Berm located in the Puuloa Training facility at Ewa Beach, HI. HIES provided all design documents, as well as as-builts for this project, and worked in coordination with OSHA and the EPA.
HIES utilized civil, structural, GIS, and Geophysical engineers for berms C through F to control soil, slope, and water erosion on the berms. The erosion design was implemented due to the possibility that erosion would cause the primary and secondary berms to leach into the ocean and the possibility of collapse due the undermining of the berm caused by natural erosion and bullet impact.
The de-leading process used a wet dry soil separation method from a mobile equipment where HIES physically performed lead, UXO, and metals remediation. The rifle range uses .45 Caliber, .38 caliber, Shotguns, M-16, and up to a 7.62 caliber where upon impact, some of the rounds would explode to fragmented pieces. To clean the fragmented lead and whole bullets including shells, penetrators, and shots, HIES utilizes a 4 screen/hopper, trommel, and soil washing system where even 1/4 inch lead fragments are isolated from berm rocks of equal size through a segragation method. This mobile system is cost effective due to its ease of transport and size thus enabling the company to minimize the range facilities closure time and exposure. If UXO / Live rounds are not detected during physical exams, the dirt is passed through a heavy steel compartment of screens where it will most likely be detected. This compartment protects labor personnel against discharge. This new method greatly reduces maintenance cost of traditional earthern berms and will also save the clients from investing in costly bullet trap alternatives. Calculated mixtures of fill replaced original materials and is anticipated to reduce future maintenance costs by 50% or more.
Soil, water, compaction, and air monitoring testing were conducted at different phases of the project to test hazmat levels at all firing lines for training safety purposes. These tests were conducted to measure lead and contamination levels that may affect the health of shooters.