Sandra is a Principal Scientist at SiREM, and is an environmental microbiologist with advanced technical experience in bioaugmentation cultures and laboratory treatability studies. Sandra has over 20 years of experience at SIREM developing, maintaining and applying microbial cultures used to improve the rate and extend of bioremediation for a wide range of environmental contaminants including chlorinated solvents, 1,4-dioxane and petroleum hydrocarbons. She provides senior technical oversight for laboratory treatability studies for a wide range of environmental contaminants, including halogenated organics (e.g., solvents, pesticides, etc.) and inorganics, both alone and in complex mixtures using a wide range of standard and innovative technologies (bioremediation, ISCO, ISCR, natural attenuation etc.).