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STATE OF CALIFORNIA—HEALTH AND WELFARE *CY GEORGE DEUKMEJIAN, Gomm r <br /> DEPARTMENT OF HEALTH SERVICES <br /> q%CE, <br /> � <br /> 714/744 P STREET <br /> P.O. BOX 942732 <br /> SACRAMENTO, CA 94234-7320 ^ ,I�O� <br /> (916) 322-3670 JAN O January 5 , 1988 <br /> NIAL L FI <br /> E�VPEWff I SER ICES <br /> Mr. William S. Rickman <br /> Ogden Environmental Services, Inc. <br /> P.O. Box 85178 <br /> San Diego, CA 92138-5178 <br /> Dear Mr. Rickman: <br /> AMENDMENT 1 TO DHS VARIANCE FOR DEMONSTRATION OF CIRCULATING BED <br /> COMBUSTOR TECHNOLOGY IN STOCKTON, CALIFORNIA <br /> The Department of Health Services (DHS) , Toxic Substances Control <br /> Division, Alternative Technology Section received your November 28, <br /> 1988 letter requesting a change to conditions of the July 27, 1988 <br /> variance granted to OES. The request is to change the performance <br /> monitoring interval from a one minute average interval to a two <br /> minute average interval. The request was made on your behalf by <br /> Mr. G. Scott Koken of your company. Your request was based on <br /> limitations of the CBC data acquisition system. <br /> Based on the information presented in your letter, DHS has <br /> determined that monitoring the CBC operation on a two minute <br /> average interval does not pose any additional potential safety, <br /> health, or environmental threat. Therefore, DHS hereby amends the <br /> July 29, 1988 variance by requiring a two minute average interval <br /> to monitor the respective process variables listed in conditions B1 <br /> through B5. All other conditions to the subject variance will <br /> remain in effect. <br /> Sincerely, �— <br /> ames T. Allen, Ph.D. , Chief <br /> Aternative Technology Section <br /> Toxic Substances Control Division <br /> cc: See next page <br />