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it=:) Arnold <br />chwarzenegger <br />C3 Governor C-1 <br />r\.) <br />CD <br />AR% California Retonal Water Quality Control Board <br />Central Valley Region <br />Robert Schneider, Chair <br />Sacramento Main Office <br />11020 Sun Center Drive #200, Rancho Cordova, California 95670-6114 <br />Phone (916) 464-3291 • FAX (916) 464-4645 <br />http://www.waterboards.ca.gov/centralvalley <br />17 October 2005 <br />Mr. Scott Hilyard <br />California Army National Guard <br />9800 Goethe Road <br />Sacramento, CA 95826-9101 <br />PRELIMINARY ASSESSMENT/SITE INVESTIGATION UPDATE REPORT, CALIFORNIA <br />ARMY NATIONAL GUARD FACILITY, 8010 AIRPORT WAY AND 2000 STIMPSON ROAD <br />STOCKTO1V, SAN JOAQUIN COUNTY <br />Central Valley Regional Water Quality Control Board staff (Regional Board staff) has reviewed the <br />Preliminary Assessment/Site Investigation Update Report (PA/SI Update Report) for the California <br />Army National Guard (CANG) Facility received on 7 June 2005. Regional Board staff comments on the <br />PA/SI Update Report are provided below. <br />General Comments <br />Regional Board staff notes the lack of timely reporting on this project. The field investigation <br />presented in the PA/SI Update Report was conducted 16 months before the report was submitted for <br />Regional Board staff review. A substantial petroleum release was detected in the Operation and <br />Maintenance Shop (OMS) area and a bluish-white powder was discovered in the area of uplifted <br />pavement in the Combined Support and Maintenance Shop (CSMS) area, but CANG did not report <br />these findings prior to submittal of the PA/SI Update Report. Please explain why these findings <br />were not reported promptly and why the report took 16 months to submit for regulatory review when <br />it was submitted to the U.S. Army Corps of Engineers as an apparent "final" in September 2004 <br />(Report Cover Letter from Mr. Tim Berger of Versar to Mr. Gary Krongard of USACE dated 8 <br />September 2004). In the future, reports should be submitted in a more timely manner. <br />The PA/SI Update Report indicates a bluish-white powder was encountered in the uplifted pavement <br />areas of the CSMS and it was tentatively identified as copper sulfate. The PA/SI Update Report does <br />not provide any analytical results to support this identification or discuss which EPA analytical <br />methods were used to test the powder. Discussion of the specific testing that was done along with <br />the tabulated analytical results should be added to the PA/SI Update Report. <br />Also, Regional Board staff request submittal of all analytical data on the bluish-white crystalline <br />powder that CANG has collected by 4 November 2005. Furthermore, Regional Board staff request <br />California Environnzental Protection Agency <br />Alan C. Lloyd, Ph.D. <br />Agency Secretary <br />(Z.3 Recycled Paper