Laserfiche WebLink
FEB-09-2005 14:43 CAMBRI.A 1707 935 6649 P.01/02 <br /> ENVIRONNI-ENTAL HEALTh IEPARTMENT <br /> SAN JOAQUIN COUNTY (hril Stipervisvr5 <br /> Donna K.Heran,RX'"-s. Carl Borginan. RI.A.I. <br /> 304 East Weber Avenue, Third Floor <br /> Mike Huggins,R.EKS..R.D.I. <br /> Z. Al 01.svn,RI'A.S. Stockton, California 95202-2708 <br /> / 0011glis W Wilson,RTJVS. <br /> ni 111amig(w Telephone: (209) 468-3420 Margaret Laprio,R.E.H-S. <br /> Laurie A.Cotullu,RX.H.S. Fax. (209) 464-0138 Robw McO'C11011.HIM.3. <br /> program Manager Mark Barccllos,R.E.Ii-fi, <br /> OLYMPIAN Project No. 1 r B 0 2 2005 <br /> 2000 ALAMEDA DE LAS PULGAS <br /> RPPTT <br /> __PFBF-- <br /> SUITE 242 <br /> SAN MATEO CA 94403 <br /> RE: JIMCO TRUCK PLAZA SITE CODE: 1604 <br /> 1022 Frontage Road(Formerly 22502 S. Highway 99) <br /> Ripon, California <br /> San Joaquin County Environmental Health Department (EHD) has reviewed analytical <br /> results for groundwater samples collected in July 2004 and monitoring-well groundwater <br /> levels at the above-referenced site; soil lithologgy at this site; and analytical data collected <br /> at the adjacent Ripon Farm Services site where soil vapor extraction (SVE) and an in-situ <br /> air sparging system were in operation intermittently from November 2000 through <br /> November 2004. Advanced GeoEhvironmental, Inc- (AGE) recommends that a soil <br /> vapor extraction system (SVE) and, potentially, an air sparging program be implemented <br /> at Jimco Truck Plaza as an interim remediation measure to mitigate soil impacted with <br /> benzene, toluene, ethyl benzene, and xylenes (13TEX), and methyl tertiary-butyl ether <br /> (MTBE). <br /> EHD approves a soil vapor extraction pilot study at Jimco,Truck Plaza after observing a <br /> significant mass reduction of BTEX, total petroleum hydrocarbons as gasoline,total <br /> petroleum hydrocarbons as diesel, MTBE, di-isopropyl ether, and tertiary butyl alcohol <br /> that apparently resulted from the soil vapor extraction operation at Ripon Farms Services <br /> (RFS). However,the SVE system must be designed based on the site lithology at Jimco <br /> Truck Plaza, which appears to have a higher proportion of fine-grained soil compared to <br /> the RFS site. EHD also recommends that you assess this site and, if appropriate, conduct <br /> an in-situ air sparging pilot study also. Please submit a work plan to EHD for the SVE <br /> pilot study and, if appropriate, an air sparging system by March 25, 2005. <br /> Further investigation to assess the vertical extent of impacted soil and groundwater in the <br /> location of the former underground storage tanks, and the lateral extent of impacted <br /> groundwater west of monitoring wells MW-8 and MW-9 should be conducted <br /> concurrently with the proposed work. A corrective action plan may be submitted after <br /> the site assessment has been completed. Please submit a work plan to EHD by March 25, <br /> 2005, that will address the additional vertical and lateral delineations. <br /> post4t-Fax Note 7671 tii" q, #a <br /> Pepe' FEB n 2005 <br /> F-- .n <br /> opt- <br /> Phone# hone# <br /> Fax 0 Fax 0 <br />