1 Next add your ingredients: the compost and kelp or molasses. 2  Let the tea brew for about 24 hours. 3  Make sure the opening to the air pump is distributed evenly (cheapest is an air stone) and secured to the bottom, so it does not get pushed to the top overnight. 4  This will keep the tea sufficiently aerobic.
One example of a technical control is data encryption. Other examples are network intrusion detection systems, passwords, firewalls and access control lists. Continue Reading. Technical controls secure computing system and information access through strategically designed software and hardware.
OSHA's early interpretive guidance on 29 CFR 1910.95(b)(1) indicated that feasible engineering or administrative controls must be used to reduce noise to acceptable levels and that PPE must be used as a supplement when such controls are not completely effective in achieving this objective.