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Page 11 of 40 <br /> Treatment Process Description <br /> Neutralization of Spent Caustic <br /> Our caustic cleaning solution is used until it is spent. The acid <br /> to accomplish the neutralization is brought in just for that purpose <br /> and is slowly pumped off the delivery truck while we recirculate the <br /> tank monitoring the neutralization with in—line pH meter. When the <br /> contents of the tank stabilize at a neutral pH, we flush the neutralized <br /> solution to the industrial sever system. <br />