Grove - Our Practices Olivo follows a sustainable quality management program to ensure that it produces olive oil of the best quality. All Olivo oil is extra virgin of international quality, with a remarkably low acidity (less than 1/10th of one percent) and peroxide value (6.0 mEq/Kg). This reflects the careful management of the trees and the emphasis on quality during picking, pressing and storage. The olives are hand picked, cold pressed without delay, then stored under inert gas until bottling. Bottling is carried out by Martinborough Wine Services in a hygienic environment and the bottles are stored in a cool store until sold AsureQuality provides laboratory services to analyse the oil for its extra virgin properties – level of free fatty acids, peroxide value and total phenolics.