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a. If the pH is under 5, add sodium borate in '/4 teaspoon increments until the pH is 5 or <br /> above. <br /> b. If the pH is over 10, add approx. '/4 packet of Neutralex at a time, shake and let sit for 15 <br /> minutes minimum, and repeat until the pH is below 10. <br /> 7. Using the Residual Formaldehyde Test Kit from the refrigerator: <br /> a. Add 5 mL of sample to the small vial in the kit. <br /> b. Add 10 drops of sodium hydroxide to the vial and gently turn vial between fingers to mix. <br /> c. Dip a test strip into the vial for one second. Compare the resultant color on the strip <br /> with the chart on the strip container at 60 seconds after dipping. <br /> d. Record test results on the log. <br /> e. If the residual formaldehyde reading is >100 ppm, repeat treatment with '/4-'/2 bag of <br /> Neutralex, retest after treatment, and record the results. <br /> 8. Once the pH is between 5 and 10 and residual formaldehyde is <100ppm, initial the back of <br /> the jug label indicating that the jug is ready for discharge and record the final pH and residual <br /> formaldehyde. <br /> 9. Treated waste formalin is disposed of directly into tank B by a SLA wearing a respirator with <br /> assistance from another SLA wearing a respirator. <br /> a. Obtain key to tank B and use a lab cart to transport jugs that are ready for disposal to <br /> the back parking lot. <br /> b. Wearing a lab apron, rubber gloves, and a respirator, unlock the tank lid. Gently shake <br /> the jug, then remove lid and pour the neutralized waste formalin into the tank. The SLA <br /> on the ground can shake the jug and hand them to the SLA on the step-stool. After <br /> emptying contents, the SLA on the platform ladder can then hand the empty jug back <br /> down to the SLA on the ground. <br /> c. After all jugs are empty, replace and lock the tank B lid. Erase all information from jug <br /> labels before returning the jugs to lab. <br /> References: <br /> Neutralex MSDS: <br /> www.scigenus.com/Documentation/Doc 634479794717333042 4047MSDS.pdf <br /> Treatment Procedure for Formalin Using the EPR/DTSC Certified Neutralex® Technology: <br /> www.scigenus.com/Documentation/Doc 634251154106616875 10FormalinProcedure 2010.pdf <br /> Neutralex Patent: <br /> www.google.com/patents/US5545336 <br /> Residual formalin test kit patent (alternative test patent): <br /> www.google.com/patents/US6426182 <br /> Neutralex Treatment Note: <br /> https:Hnrm.dfq.ca.gov/FileHandler.ashx?DocumentlD=69455 <br /> Revised 10/8/2018 by A. Hennessy <br />