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Appendix A
Sensafe Soil Check Methodology

1. Fill test vials from the kit with soil until half full.
   
   
2. Add reagent containing distilled white vinegar in equal amounts to each test vial.
   
   
3. Shake the test vials for 10 seconds.
   
   
4. Dip heavy metal strips containing dithizone into the soil-reagent mix for 5 seconds.
   
   
5. Place the test strip (with the oval window of the test pad facing up) on a plate for a period of 10 minutes (for a detection limit of 100 ppm of lead).
   
   
6. Rinse the test strip with tap water and immediately match to the color chart.
   
   
7. Record the dominant color of the test strip. Record a dominant color of pink as a positive sample (above a detection limit of 100 ppm). Record a dominant color of green/gray as a negative sample (indicating lead levels less than the detection limit of 100 ppm).