Accepted for presentation in the following SYMPOSIUM at #ACSPhilly 2016: Recent Advances in Remediation Strategies and Technologies for the Cleanup of Hazardous Waste Sites ABSTRACT SYMPOSIUM PROGRAM AREA NAME: ENVR PRESENTATION TYPE: Oral Only TITLE: Headspace GC/PID for on-site screening of soil and water at hazardous waste sites AUTHORS (FIRST NAME, LAST NAME): John N. Driscoll 1 , Jennifer L. Maclachlan 2 INSTITUTIONS (ALL): 1. PID Analyzers, LLC , Centerville, MA, United States. 2. PID Analyzers , LLC, Sandwich, MA, United States. ABSTRACT BODY: Abstract: Headspace screening of VOC’s in soil and water samples in the laboratories is a common practice to prevent high level samples from contaminating the GC/MS. The screening of soil and water samples in the field using a headspace photoionization detection (PID), as a Level I field screening tool, has been a common practice that has been in use for more than 25 years. A battery operated portable gas ch