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California Regional Water Quality Control Board <br /> Central Valley Region t <br /> Winston H.Hickox Robert Schneider,Chair <br /> Secretaryfor Gray Davis <br /> Environmental Fresno Branch Office Governor <br /> Internet Address: http://www.swrcb.ca.gov/—mgcb5 <br /> Protection 1685 E Street,Fresno,California 93706-2020 <br /> Phone(559)445-5116•FAX(559)445-5910 <br /> 9 January 2003 UUU JAN <br /> 2 1 2003 <br /> ENVIRONMENT HEALTH <br /> Ms. Penny Fottrell PERMIT/SERVICES <br /> Chevron Environmental Management Company <br /> P.O. Box 6012 <br /> San Ramon, California 94583 <br /> MONITORING AND REPORTING PROGRAM,ALDEN PARK, TRACY, SAN JOAQUIN <br /> COUNTY. <br /> Enclosed is Monitoring and Reporting Program (MRP)No. R5-2003-0801, which replaces MRP 97-801. <br /> Geomatrix Consultants, Inc. (Geomatrix)provided the draft MRP and requested additional changes on <br /> your behalf in an e-mail dated 25 November 2002. Geomatrix requested removing benzene, toluene, <br /> ethylbenzene, and xylenes (BTEX) and total petroleum hydrocarbons, as gasoline (TPH-g) from the <br /> sampling program. <br /> BTEX was last detected in groundwater at concentrations that exceeded the Regional Board Water <br /> Quality Objectives in 1989 and TPH-g concentrations last exceeded the Water Quality Objectives in <br /> 1998. In addition, Geomatrix requested that the frequency of sampling be reduced from quarterly to <br /> semi-annual. <br /> The requested changes have been incorporated as discussed below. <br /> 1. BTEX and TPH-g was removed from the sampling program; and, <br /> 2. Sampling frequency was reduced from quarterly to semi-annual for all remaining constituents. <br /> If you have any questions, you may contact Dean Hubbard at (559) 445-5179. <br /> tLTON <br /> �`kl�46?0�Z2 R. G C. DEAN HUBBARD <br /> Senior Engineering Geologist Associate Engineering Geologist <br /> R. G. 6357 <br /> cc: <br /> Mr. Michael Infurna, San Joaquin County Environmental Health Services, Stockton <br /> Mr. Brian Turner, Geomatrix, Oakland <br /> California Environmental Protection Agency <br /> 0 Recycled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> For a list of simple ways you can reduce demand and cut vour enerev cnsr. SPP oor WPF.-ci1P 1 h11n 1. .....n..- -- --..,__._ <br />