Face wipes

The measurement of foot exposure to pesticides is not commonly performed in worker exposure studies. However, the measurement of foot exposure can be accomplished by either using socks as a foot dosimeter or by washing the foot using similar procedures to those used for the face wipe. 

Many types of matrices have been used in the past to measure the field stability of the test substance. Cotton gloves, cellulose patches, face wipe handkerchiefs and/or gauze face wipe matrices, long underwear (inner dosimeters), pants, shirts, coveralls (outer dosimeters), sorbent tubes, urine, and other matrices are common matrices that have been used for this purpose. 

Face wipe samples are treated similarly. The face wipe is placed in an appropriate jar and wet with the appropriate amount of wash solution. The sample is then spiked using a 1-mL volumetric pipet and immediately capped, processed, and frozen. 

A short weathering time for hand wash and face wipe samples is appropriate since these types of samples taken from test volunteers are usually processed and frozen immediately and are not subjected to weathering as are the dosimeter or air matrices. 

Field fortification samples are stored under various conditions in the fleld. Generally, after the weathering period is complete, the fleld fortification samples such as dosimeter sections are wrapped in aluminum foil, placed in a pre-labeled zip-type bag, and immediately placed on dry-ice in a cooler or in a freezer. Field fortification samples such as hand washes or face wipes are prepared in labeled jars, the lids are immediately taped with electrical tape, and the jars are placed in a zip-type bag and wrapped in bubble-pack and immediately placed in frozen storage. Air tubes or air filters are collected after weathering and wrapped so as to prevent breakage. These samples are then placed in a pre-labeled zip-type bag and immediately placed in frozen storage. 

Use of hand washes, face wipes, or head patches to measure hand, face, and neck exposure... 

Samples of dosimeters, hand wash, face wipes, patches, air tubes, filters, etc., should be immediately frozen in the field by placing them in coolers of dry-ice or in freezers immediately after collection. If dry-ice is to be used, enough dry-ice should be present in the cooler to freeze the sample within 15-30 min. 

When multiple hand washes or multiple face wipes are performed in the course of a replicate, the analytical results from the multiple washes of the matrix are added. Occasionally, a hand wash or face wipe is performed on a worker prior to the replicate to determine the background hand level of the analyte (active ingredient). If this is the case, the background amount can be subtracted from the overall analytical result for that wash. 

Because intakes associated with accidents or incidents can result in conunitted effective doses which approach or exceed dose limits, individual and material specific data are normally needed for exposure assessment. These data include information on the chemical and physical forms of the radionuclide(s), the particle size, airborne concentrations, surface contamination levels, the retention characteristics in the individual affected, nose blows, face wipes and other skin contamination levels and external dosimetry results. The various items of data will often seem to be inconsistent or contradictory, particularly if the intake period is imcertain. An adequate assessment of dose can be made only after considering all of the data, resolving the sources of inconsistency as far as is possible, and determining the most likely and worst possible scenarios for the exposme and the magnitnde of ary intake. 

Health Hazards Information - Recommended Personal Protective Equipment Goggles or face shield rubber gloves Symptoms Eollowing Exposure Inhalation of vapors from very hot material may cause headache, drowsiness, and convulsions. Contact with eyes may cause irritation General Treatment for Exposure INHALATION move to fresh air. EYES flush with water. SKIN wipe off flush with water wash with soap and water Toxicity by Inhalation (ThresholdLimit Value) Data not available Short-Term Exposure Limits Data not available Toxicity by Ingestion Data not available Late Toxicity Data not available Vapor (Gas) Irritant Characteristics Data not available Liquid or Solid Irritant Characteristics Data not available Odor Threshold Data not available. 

---