Not directly related to food (we are regulated under dietary supplements) but we pull botanical extracts from agricultural products and I'm wondering what "normal" levels look like for heavy metals and pesticides? I'm being told that "according to American Herbal Pharmacopoeia 2014... For agricultural, the limit is 360,000 ppb and for extract the limit is 36,000 ppb of lead." but I want to make sure that is accurate. We require LOQ for our finished product but I would like to be able to catch any issues earlier than finished product. Thank you in advance for your help!