Subsequent to 1943, the use of Lead Arsenic was banned from the Orchards standing on the Hanford site. This use of Lead Arsenate pesticide was popular among the orchard owners and was dispersed over the site in a myriad of ways. The presence of the traces of lead and arsenic are found today, more than half a century later. Using a portable X-ray florescence analyzer (XRF), the values of lead and arsenic are evaluated while determining the efficiency of the equipment itself. Samples from different decision sites were collected, with lead arsenic values in the low, high and medium range to the Standards provided by Washington State. Using key operating procedures, an optimization study was conducted to evaluate the performance of the analyzer. Each sample was evaluated for different count times, ranging from 15-180 seconds. The samples were also scanned in fixed and variable positions. The optimal time observed was 60 seconds and a high variability of lead and arsenic concetration values in the soil was concluded
