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o 4u' c SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DEPARTMENT <br /> 600 E Main Street Stockton - CA 95202 <br /> (209)468-3420•Fax:(209)468-3448• Web:www.sLaov.orp/ehd <br /> LJFO�� <br /> EMERGENCY RESPONSE INVESTIGATION REPORT:(INCLUDE CHRONOLOGICAL HISTORY RECOMMENDATION$.CLEANUP aad FINAL DISPOSRION1 <br /> 4125111 <br /> Received a call from informing that a pipe malfunctioned at a weld and released <br /> 20 gallons of 98% Sulfuric Acid. Arrived on site at 5:45 pm and met with Richard Bennett. He informed that a valve <br /> at a 4 inch metal pipe leaked at a weld. While taking pictures it was observed that there is a trench area below the <br /> road and free standing acid was present. Looking at the amount of acid spilled in the area it was obvious that it was <br /> more than 20 gallons. When asked Richard informed that about 40 to 50 gallons was released onto the road and <br /> some went in the dirt area. Richard informed that soda ash is used to neutralize the acid. The waste generated will <br /> be stored in a bin and profiled by the environmental compliance person tomorrow. <br /> After the initial clean up a area was sampled and the pH was 1.79. Richard informed that he will perform further <br /> clean up the next day. The area will be secured. <br /> 4126111 <br /> Went to the Facility at 10.00am and met with Jose Colin from NRC Environmental Services, and Ryan Mock. I was <br /> told that they will use soda ash to neutralise the acid. In some areas the soda ash will be used in solution form. I <br /> was told that the clean up will be complete by 2.30pm. <br /> Went to the site at 2.30pm and met with Ryan Mock. He informed that the area has been cleaned and the <br /> confirmation sample has a pH of 3.6. He said that is a good number for that area. He also informed that all the <br /> waste generated will be used in the process. No disposal record generated. <br /> Rev.08116/10 Page 3 of 3 ER Record <br />