I think your previous QA manager was referring to a self inspection or inventory of the chemical and making sure the company is compliant to 11.6.4 not an actual audit per se but I could be wrong. Why not, just go by the SQF guidance itself rather than trying to decode the previous QA manager?
11.6.4.1 Hazardous chemicals and toxic substances with the potential for food contamination shall be stored so as not to present a hazard to staff, product, packaging, product handling equipment or areas in which the product is handled, stored or transported.
11.6.4.2 Processing utensils and packaging shall not be stored in areas used to store hazardous chemicals and toxic substances.
11.6.4.3 Daily supplies of chemicals used for continuous sanitizing of water or as a processing aid, or for emergency cleaning of food processing equipment or surfaces in food contact zones, may be stored within or in close proximity to a processing area provided access to the chemical storage site is restricted to authorized personnel.
11.6.4.4 Pesticides, rodenticides, fumigants and insecticides shall be stored separate from sanitizers and detergents. All chemicals shall be stored in their original containers, or in clearly labelled and suitable secondary containers if allowed by applicable legislation.
11.6.4.5 Hazardous chemical and toxic substance storage facilities shall:
i. Be compliant with national and local legislation and designed such that there is no cross contamination between chemicals;
ii. Be adequately ventilated;
iii. Be provided with appropriate signage indicating the area is a hazardous storage area;
iv. Be secure and lockable to restrict access only to those personnel with formal training in the handling and use of hazardous chemicals and toxic substances;
v. Have instructions on the safe handling of hazardous chemicals and toxic substances readily accessible to staff;
vi. Be equipped with a detailed and up-to-date inventory of all chemicals contained in the storage site;
vii. Have suitable first aid equipment and protective clothing available close to the storage area;
viii. In the event of a hazardous spill, be designed such that spillage and drainage from the area is contained; and
ix. Be equipped with spillage kits and cleaning equipment.