Safety precautions are not only the right thing to do to prevent illness, they are especially important for the all-volunteer garden. We must take all steps to ensure that we are impeccable stewards of the land, which means we must adhere to good agricultural practices (GAPs). The Leopold Center for Sustainable Agriculture (2004, 1) explains why gardeners need to undertake good agricultural practices:
Food safety concerns are increasing as once unheard of illness-causing microorganisms become more prevalent and as products previously considered safe cause an increasing number of illnesses each year. Produce, recently thought of as a safe product, has been identified as a cause of major foodborne illness outbreaks in recent years.
Illnesses are primarily caused by bacteria, viruses, parasites, and fungi. These microorganisms, often referred to as pathogens or biological hazards, also are associated with ground beef, poultry, eggs, and seafood. Cooking is a common method of easily killing most pathogens in those foods. However, fresh produce is often consumed raw.
In addition, produce is exposed to naturally occurring, biological hazards in the soil, water, and air. The potential risk for contamination is increased by production practices using manure for fertilizer and human handling of products.
It is likely that you or someone you know has suffered from food poisoning.  The U.S. Centers for Disease Control and Prevention estimates that 1 in 6 people in the United States gets sick from a foodborne disease (also called food poisoning) each year, which results in 128,000 hospitalizations and 3,000 deaths (CDC 2014). Causes of foodborne diseases include bacteria, viruses, parasites, molds, toxins, contaminants, and allergens. For details on each of these causes, read the Food and Drug Administration’s Bad Bug Book: Handbook of Foodborne Pathogenic Microorganisms and Natural Toxins (FDA 2012).
To prevent the spread of foodborne pathogens, properly wash your hands regularly, keep tools clean, and follow all safety instructions.
Do not volunteer when you are feeling sick.