(A) Alcohol or methanol-moistened filter papers or sterile gauze pads or laboratory-approved media shall be used to collect wipe samples from hard, non-porous surfaces from areas 100 square centimeter (10 cm X 10 cm) in size for single, discrete samples and 100 square centimeter to 400 square centimeter in size for composite samples. A separate filter paper is to be used for each sample location. Upon completion of each composite sampling group, all of the filter papers used to collect the composite sample are placed into a single sample collection container.
(B) Proper sample techniques and procedures are to be used by the testing and decontamination contractor. These techniques and procedures include proper equipment and supplies, off-site preparation, on-site procedures, field quality control, chain of custody record, transportation of samples, decontamination of equipment and supplies (to prevent cross-contamination), site clean-up, sample log form, and handling of methanol and alcohol. Photographic documentation should also be included.
(C) The analytical results obtained through sampling shall be sued to determine the levels of contamination. Required locations for sample collections shall include, but are not limited to:
(1) HVAC duct system and all exhaust fans;
(2) Bathroom wall, floor and ceiling surfaces;
(3) Lab site wall, floor and ceiling surfaces;
(4) Kitchen wall, floor and ceiling surfaces, including range hoods and exhausts; and
(5) All other room wall, floor and ceiling surfaces.
(D) Collection of samples shall be performed by certified decontamination contractors using:
(1) Standards and protocols to ensure accuracy and the ability to produce similar results with repeated sampling;
(2) Proper swabbing techniques to collect a representative sample of the area being sampled;
(3) Proper care and prudent action to avoid contamination during sampling, including the use of clean gloves for each sample; and
(4) Use of a blank for assurance that calibration is accurate, and use a blank to test the cleanliness of the gloved hands of the inspector.
(E) All samples collected, transported or stored by the decontamination contractor and sent by the decontamination contractor to the certified laboratory for analysis under the provisions of this section must be secure to assure an unbroken chain-of-custody.
(Ord. 09-14, passed 12-15-2009)