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San Joaquin County
<br /> " Environmental Health Department DIRECTOR
<br /> Donna Heran,REHS
<br /> 1868 East Hazelton Avenue
<br /> PROGRAM COORDINATORS
<br /> < Stockton, California 95205-6232 Robert McClellon, REHS
<br /> Jeff Carruesco,REHS,RDI
<br /> P Website: wwwsjgov.org/ehd Kasey Foley, REHS
<br /> Rig Linda Turkatte,REHS
<br /> Phone: (209) 468-3420 Rodney Estrada, REHS
<br /> Fax: (209) 464-0138 Adrienne Ellsaesser, REHS
<br /> July 21, 2014
<br /> ExxonMobil Environmental Services Co. Edna Filippi Family Trust
<br /> c/o Ms. Jennifer C. Sedlachek Limited Partnership ETAL
<br /> 4096 Piedmont Avenue No. 194 c/o Mr. Robert Fay
<br /> Oakland, California 94611 Bank of Stockton Trust Dept.
<br /> P. O. Box 1110
<br /> Stockton, California 95201
<br /> Robert Novacek TR, ETAL
<br /> c/o Ms. Joylyn L. Novecek TR
<br /> 1132- )x erd,Nay 1;-7g S,lv W [44,'D
<br /> $.tookton, Cali{ornia 952077
<br /> Q
<br /> Subject: Former Exxon Service Station No. 73942 LOP Case No.: 2231
<br /> 4444 North Pershing Avenue CUF Claim No.: 5312
<br /> Stockton, California 95207
<br /> The San Joaquin County Environmental Health Department (EHD) has received and reviewed
<br /> Semi-Annual Groundwater Monitoring Report, Fourth Quarter 2013, dated 6 February 2014, and
<br /> Revised Notice of Intent for Waste Discharge Requirements (NOI), dated 27 June 2014, both
<br /> prepared and submitted by your consulting firm, Cardno ERI (Cardno), on your behalf for the
<br /> above-referenced site. Based on information presented in these two reports and historical
<br /> groundwater analytical data, the EHD directs the following groundwater sampling schedule for
<br /> this site:
<br /> • Omit sampling groundwater in monitoring wells MW-1, MW-2, MW-4, MW-5, MW-7
<br /> through MW-9, MW-12 and MW-13 (except as proposed in the NOI for MW-1, MW-12
<br /> and MW-13 if approved by the California Central Valley Regional Water Quality Control
<br /> Board);
<br /> • Annually collect groundwater samples from MW-3, MW-14, RW4, SW2 and IW1 (except
<br /> as proposed in the NOI for MW-3 and RW4 if approved by the California Central Valley
<br /> Regional Water Quality Control Board);
<br /> • Semi-annually collect groundwater samples from MW-6, MW-10, UVB, VW1 through
<br /> VW5, RW1 and RW2; and
<br /> • Depending on the proposal presented in the NOI and approved by the California Central
<br /> Valley Regional Water Quality Control Board, either quarterly or semi-annually collect
<br /> groundwater from SW1, SW2, UVB-MW1, UVB-MW2, V1 through V4, IP1A/B, IP2A/B,
<br /> IP3A/B, PSV-1 and PSV-2; with the exception of V3, Cardno has proposed injecting
<br /> PersulfOxTM into groundwater from an injection system consisting of these monitoring
<br /> and remediation wells.
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