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CALIFORNIA REGIL WATER QUALITY CONTROL BOAR <br />CENTRAL VALLEYIRCGION <br />3443 Routier Road, Suite A <br />Sacramento, CA 95827-3003 <br />Phone (916) 255-3000 <br />FAX (916) 255-3015 <br />Mr. Werner Sicvol <br />BP Oil Company <br />200 Public Square 7-I <br />Cleveland, Ohio 44114-2375 <br />�`\'✓ Cal/EPA <br />Pete Wilson, Governor <br />30 April 1998 <br />COMMENTS ON THE FIRST QUARTERLY MONITORING REPORT FOR 1998, BP OIL COMPANY/ <br />APPLIED AEROSPACE STRUCTURES CORPORATION, STOCKTON, SAN JOAQUIN COUNTY <br />3W3 --I <br />I have reviewed the February 1998 Quarterly Monitoring Report No. 1 for the BP Oil Company/ <br />Applied Aerospace Structures Corporation site in Stockton. My comments are presented below. <br />Table 2, table of results, should show the oxygenate and natural attenuation results even if they are <br />nondetect. <br />2. The natural attenuation parameters consisting of dissolved oxygen (DO) and oxidation-reduction <br />potential (ORP) are incomplete. An article in the May 1997 US EPA's Proceedings of'the <br />Symposium on Natural Attenuation of Chlorinated Organics in Ground Water entitled Overview of <br />the Technical Protocol for Natural Attenuation of Chlorinated Aliphatic Hydrocarbons in Ground <br />Water Under Development for the U.S. Air Force Center./or Environmental Excellence lists natural <br />attenuation parameters which should be included in the monitoring program. In addition to DO and <br />ORP, Table lA of the article also lists carbon dioxide, chloride, nitrate, iron (II), sulfate, methane, <br />ethane, ethene, alkalinity, pH, temperature, conductivity, and total organic carbon. These <br />parameters should be included in your monitoring program in order to adequately evaluate <br />occurrence of natural attenuation at the site. <br />By 22 May 1998, please respond to the above comments and submit a revised project schedule. The <br />27 February 1998 revised schedule is no longer valid because most of the milestones have passed and <br />the items have not been completed. <br />If you have any questions, you may call me at (916) 255-3081. <br />6, � <br />PHILIP I�SORENA <br />Associate Engineer <br />PSI:psi/lsb <br />cc: San Joaquin County Public Health Services, Stockton <br />Mr. Fred Kintzer, Parsons Engineering Science, Inc., Oakland <br />Recvcled Poper Our mission is to preserve and enhance the quality of California's seater resources. and <br />ensure their proper allocation and efficient use for the benefit of present and. future generations. <br />