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X Ami Adini <br /> o <br /> AA` & Associates, Inc. <br /> AUG 1 7 [010 <br /> August 13,2010 <br /> ENVIRONMENT HEALTH <br /> PERMITiSERVICES <br /> Ms.Vicki L.McCartney <br /> Senior Registered Environmental Health Specialist <br /> San Joaquin County <br /> Environmental Health Department <br /> 600 East Main Street <br /> Stockton,California 95202-3029 <br /> Tel: (209)468-3456 <br /> Fax: (209)468-3433 <br /> Email: vmccartney@sicehd.com <br /> RE: Frontier Transportation,Incorporated <br /> 425 Larch Road,Tracy,California 95304 <br /> Leaking Petroleum Underground Storage Tanks Environmental Case <br /> San Joaquin County Environmental Health Dept.(SJCEHD)-CASE No.2251 <br /> Central Valley RWCB(Region 5S) -Case No.390893 <br /> Global ID No. T0607700719; CUF Claim No. 12886 <br /> Boring/Well Permit Application(Bl -B8 & MW28) <br /> Dear Ms. McCartney, <br /> As you may recall, our company,Ami Adim &Associates (AA&A), is planning to conduct an off-site soil and Groundwater <br /> Investigation at the above-referenced property and vicinity. In a letter dated May 7, 2010 (attached), the SJCDEH mshucted our <br /> client,Mr Zumberge,to conduct an off-site soil and groundwater Investigation(GWI),in accordance with AA&A's Groundwater <br /> Investigation Work Plan,dated March 10,2010(attached). <br /> This off-site groundwater Investigation includes: <br /> • Drilling a total of eight off-site soil borings on two 4acentproperties(APN#21220004&21220005) <br /> • Drilling&installing one off-site groundwater monitoring well(MW28). <br /> PROPOSED GROUNDWATER INVESTIGATION: <br /> The proposed groundwater investigation will involve installing one groundwater monitoring well off site to the west of the <br /> property in the direction of groundwater flow.The purpose of this investigation is to evaluate if the extent of hydrocarbon <br /> impacts to groundwater in the down gradient direction,specifically MTBE.In order to sufficiently evaluate the extent of the <br /> impact to groundwater in the down gradient direction and properly identify the most efficient location of the groundwater <br /> well,several direct push soil borings will be advanced in the area of interest to a total depth of 20 feet bgs.Analytical results <br /> of grab groundwater samples from soil borings will be used to map the plume in this area. Based on the extent of offsite <br /> groundwater plume,a final well location will be determined. <br /> 4609 Russell Ave. • Los Angeles, Ca 90027 • Phone 323.913.4073 • Fax 323.667.2336 <br /> www.amiadini.com • mail@amiadini.com <br />