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Californiagional Water Quality Contl Board 0, -0 <br /> Central Valley Region <br /> Karl E. Longley,ScD, P.E.,Chair. <br /> Linda S.Adams Arnold <br /> .Secreiaa),for Sacramento Main Office Schwarzenegger <br /> Fn <br /> 11020 Sun Center Drive#200;Rancho Cordova.California 9567061 la Gorernor <br /> Yrorecoles wmal rion Phone(916)464-3291 •FAX(916)464-4645 <br /> h op://www Ovate rboards.ca.gov/w ntral v al ley . <br /> DD <br /> 6 March 2007 <br /> E/V PFF} 2007 <br /> ,%47i�rll✓ref <br /> Mr. Andrew Smith r SERCTH <br /> Herman and Helen's Marina V/CE� <br /> 15135 Eight Mile Road <br /> Stockton, CA 95219 <br /> FOURTH QUARTER AND ANNUAL REPORT— 2006, HERMAN AND HELEN'S MARINA, <br /> 15135 EIGHT MILE ROAD, STOCKTON, SAN JOAQUIN COUNTY <br /> Staff of the Regional Water Quality Control Board, Central Valley Region (Regional Water <br /> Board) reviewed the 7 February 2007 Fourth Quarter and Annual Report— 2006 (Report) <br /> submitted by Advanced GeoEnvironmental, Inc. (Advanced) for Herman and Helen's Marina <br /> located at 15135 Eight Mile Road in Stockton (Site). The Report describes groundwater <br /> monitoring and remediation activities performed during the fourth quarter 2006. Groundwater <br /> monitoring and reporting requirements for the site are set forth in Monitoring and Reporting <br /> Program (MRP) No. R5-2004-0828. <br /> Groundwater underlying the Site is polluted with petroleum hydrocarbons. Wells are screened <br /> in two groundwater-bearing layers at the site identified as the shallow and deep units. <br /> Groundwater flow direction was reportedly to the southeast in both units. During the fourth <br /> quarter, the highest contaminant concentrations were detected in groundwater samples <br /> obtained from monitoring well MW-4. Total petroleum hydrocarbons as diesel (TPHd) and <br /> gasoline (TPHg) were detected as high as 12,000 micrograms per liter (ug/L) and 3,000 ug/L, <br /> respectively. Methyl tertiary butyl ether (MTBE) was detected at 52 ug/L. The BTEX <br /> compound m,p-xylene was detected at a concentration of 270 ug/L. Target analytes were not <br /> detected in the surface water samples collected from the island drainage channel or the <br /> receiving water samples from the agricultural drainage ditch. <br /> An interim groundwater pump-and-treat system commenced operation under general National <br /> Pollution and Discharge Elimination System (NPDES) Permit No. CAG915001 in June 2005. <br /> The system was shut down to assess rebound on 15 January 2007 and is due to be restarted <br /> on 12 March 2007. Acute and chronic bioassay testing of system effluent, was conducted on 6 <br /> December 2006 to assess the result of an unauthorized discharge of approximately 54,000 <br /> gallons of effluent, contaminated with approximately 0.29 lbs of TBA, to surface water in the <br /> agricultural drainage ditch on the Site. Test results indicated 100 percent survival of the test <br /> species. <br /> Our comments on the Report are presented below. <br /> California Environmental Protection Agency <br /> C4 Recycled Paper <br />