Laserfiche WebLink
PUBLIC i%&ALTH SERN1-tCES a�,N <br /> SAN JOAQUIN COUNTY .� <br /> z <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer <br /> 304 E. Weber Ave., Third Floor • R O. Box 388 • Stockton, CA 95201-0388 <br /> 209/468-3420 <br /> 1 I r ll eX` <br /> - <br /> SCOTT HOOTON <br /> BP OIL COMPANY MAILED FEB 2 9199E <br /> 295 SW 41 ST ST <br /> BUILDING 13, SUITE N <br /> RENTON, WASHINGTON 98005-4931 <br /> RE: BP SITE #11195 SITE CODE: 1554 <br /> 16500 SOUTH 1-5 <br /> LATHROP CA <br /> This letter is being sent to summarize a telephone conversation between San Joaquin <br /> County Public Health Services, Environmental Health Division (PHS-EHD) and <br /> yourself on February 27, 1996. <br /> In a letter dated November 9, 1995, PHS-EHD requested that the quarterly data be <br /> submitted in a graphic format in addition to the usual standard tabular format. This <br /> request was made so that overall site contaminant trends can easily be identified by <br /> the reader. This type of reporting is asked of sites where-monitoring to determine <br /> degradation and reduction in contaminant concentrations by natural processes is <br /> being used as a primary cleanup alternative. The above noted telephone call was <br /> prompted because this additional data format was not being used in subsequent <br /> quarterly reports. <br /> As requested, a copy of this type of format is enclosed for your reference. Since a <br /> tremendous amount of data has been generated already from the site,. past data can <br /> be reconfigured and presented in this manner with additional information added over <br /> time. <br /> PHS-EHD understands that calculations for mass are very rough estimates. When <br /> calculated in a consistent manner, they are valuable in looking for net changes over <br /> time (stable or declining plume). When other site variables are also presented <br /> graphically, such as groundwater table elevation changes, the reader will be able to <br /> quickly consider if the changes are related to the other-site variables, or if natural <br /> processes are at work. Also, using graphic presentations of estimated mass puts the <br /> overall release into perspective by focusing attention on the state of the overall plume <br /> rather than individual well concentrations. It is understood that there is a certain <br /> amount of variability in conditions at sites from quarter to quarter. However, the <br /> A Division of San Joaquin Count}'Health Care Services <br />