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San Joaquin County DIRECTOR
<br /> Ao��N Environmental Health Department Ronna Heran, REHS
<br /> c°G ASSISTANT DIRECTOR
<br /> a. 600 East Main Street Laurie Cotulla,REHS
<br /> Stockton, California 95202-3029 PROGRAM COORDINATORS
<br /> Carl Borgman,REHS
<br /> Mike Huggins, REHS, RDI
<br /> a�7FO� Website: www.sjgov.org/ehd Margaret Lagorio, REHS
<br /> Phone: (209) 468-3420 Robert McCleilon, REHS
<br /> Fax: (209) 464-0138 Jeff Carruesco, REHS, RDI
<br /> Kasey Foley, REHS
<br /> ALLEN FETTERS MAY 14 2D07
<br /> RIPON FARM SERVICE INC
<br /> 3705 PORTSMOUTH CIRCLE
<br /> NORTH STOCKTON CA 95219
<br /> RE: Ripon Farm Service Inc. SITE CODE: 1605
<br /> 932 South Highway 99 (Formerly 22871 South Highway 99)
<br /> Ripon, CA 95366
<br /> San Joaquin County Environmental Health Department (EHD) has reviewed Quarterly Report
<br /> First Quarter 2007 dated April 24, 2007, prepared and submitted by Advanced GeoEnvironmental,
<br /> Inc. (AGE) on your behalf for the above-referenced. site. During the first quarter sampling event,
<br /> methyl tertiary-butyl ether (MTBE) was detected in groundwater samples collected from
<br /> monitoring wells MW-2 and MW-3 at 15 micrograms per liter (pg/L) and 14 pg/L, respectively;
<br /> therefore, EHD directs you to analyze for MTBE in groundwater samples collected from MW-2
<br /> and MW-3 during the second quarter 2007 sampling event and if MTBE is detected in these two
<br /> wells, continue analyzing for MTBE in groundwater samples collected from MW-2 and MW-3 as
<br /> part of each quarterly groundwater monitoring event. In addition, continue analyzing for 1,2-
<br /> dichloroethane (1,2-DCA) in groundwater samples collected quarterly from MW-1, MW-2, MW-4,
<br /> MW-9 and MW-10; and continue analyzing for MTBE, 1,2-DCA, total petroleum hydrocarbons as
<br /> gasoline (TPH-g), total extractable petroleum hydrocarbons as diesel (TPH-d), and benzene,
<br /> toluene, ethylbenzene, and total xylenes (BTEX), in groundwater samples collected annually
<br /> during the first quarterly sampling event from all monitoring wells.
<br /> By letter dated September 22, 2006, EHD conditionally approved the advancement of three direct-
<br /> push soil borings located on the west side of Highway 99 in the City of Ripon right-of-way. EHD
<br /> gave you until October 31, 2006, to response to EHD's recommendation for advancing a fourth
<br /> boring. To date, EHD has not received your response. You are now directed to submit a response
<br /> to EHD in regard to this recommendation no later thank July 13, 2007.
<br /> If you have any questions, please contact Vicki McCartney at (209) 468-9852 or by e-mail at
<br /> vmccartneyLc)sjcchd.com.
<br /> Donna Heran, REHS, Director
<br /> �Environmental Health Department
<br /> Victoria L. McCartney, Senior REHS Nuel C. Henderson, Jr., PG
<br /> LOP/Site Mitigation Unit IV Engineering Geologist
<br /> LOP/Site Mitigation Unit IV
<br /> c: CVRWQCB --James L. L. Barton, PG
<br /> Advanced GeoEnvironmental, Inc. —WilIiam Little, PG
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