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r. <br /> JJW GEOSC/ENCES Inc. ., ,* General Engineering Contractor(CA Lie#706568)IBCA DHS.Cert An1!V1 l31 i_i4oratory(E LAP#2012) <br /> Environmental Consultants F'7 1 j Well Drilling,Ci intiactor(C-57 License#706568) <br /> Engineering.Contractor _ 0`'� 6Rifi"? AAestos Consultant(#s2-0814) <br /> 10: 17. <br /> ENVIRONMENTAL HEALTH DfVISION <br /> July 12, 1999 304 E.-Weber Ave. Third'F'oor - <br /> File No. 8013-02 P. O: Box 388, Stockton CA 95201-0388 s JUL 3 a iggg <br /> Approved , <br /> Denied <br /> Condit' ns' <br /> f Mr. Jeff Wong Date by <br /> San Joaquin County <br /> Public Health Services Environmental ealth Division - <br /> 304 East Weber Avenue, 3rd Floor <br /> Stockton, Ca0ornia_.95202 <br /> M VSr /n161_0D C- (1S p A11VC &J 9� <br /> Subject: WORKPLAN FOR GROUND-WATER MONITORING WELL INSTALLATION 66A4&J- <br /> AND CONTINUED QUARTERLY GROUND-WAT "+v <br /> Q SAMPLING <br /> i V��e rr�zac-� <br /> Valley Showcase 1.'S6 994C,/Cp-omeg- I GI✓ <fbKv�'k V4T(or( <br /> 901-921 West Fremont Street Mf>L_C S gLO' rcr' op, fiioz61U <br /> ti Stockton, CaliforniaY <br /> SOT/6c, W i 15 "k.i.OT qC[ 7-C-0 <br /> - <br /> b �- t.RK S1fo� -C�tit1�(�rJC P> <br /> Dear Mr. Wong: <br /> JJW Geosciences has prepared this workplan for the installation of one ..ground-water A� <br /> monitoring well at the above referenced location (see Figure ?). 'This workplan was prepared <br /> on behalf of Mr. Louis Lechich of the Valley Showcase Company in response to your May 26, - <br /> 1999 directive that this workplan be completed. Mr. Lechich is currently receiving corrective 11 <br /> action reimbursement from the State of California Underground Storage Tank Cleanup`Fund. <br /> HISTORY K z_ <br /> In February 1988, an underground fuel,storage tank was removed from the property*(see <br /> Figure 2). During the removal of the tank, gasoline was no-ted-in the soil within the tank <br /> excavation. Soil sample analyses indicated the-presence of total petroleum hydrocarbons'as <br /> gasoline (TPHg) in the subsurface soils to a depth of at least 16 feet. The.San Joaquin County- 1 <br /> Public Health District (San Joaquin County) subsequently issued a directive to-further assess 1 <br /> the extent of soil and ground-water contamination. } <br /> In March 1994, three groundwater monitoring wells (MW-1, MW-2 and MW-3) were installed at <br /> the site in the vicinity of the former tank location (see figure 3). Each well was'installed.to a <br /> depth of approximately 30 feet below ground surface (bgs), and screened between the depths <br /> of approximately 15 feet and 30 feet bgs. - - <br /> During installation of the wells; evidence of soil contamination was noted in well borehole MW- <br /> 2 to a depth of approximately 20 feet. At that time, the depth to the water,table was measured <br /> 11350 Monier Park Place, Rancho Cordova, CA 95742 Tel: 916.853.8025 Fax: .916.853.8029 - 1 <br /> . . - <br />