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San Joaquin County DIRECTOR
<br /> Environmental Health Department
<br /> �p .00 Donna Horan, RENS
<br /> •G ASSISTANT DIRECTOR
<br /> ? 600 East Main Street Laurie Cotulla, REHS
<br /> -,
<br /> ". :< Stockton, California 95202-3029
<br /> .. _.�. PROGRAM COORDINATORS
<br /> Carl Borgman, REHS
<br /> QCixpcir' Website: www.sjgov.org/ehd Mike Huggins, REHS, RDI
<br /> Margaret Lagorio, REHS
<br /> Phone: (209)468-3420 Robert McClellon,REHS
<br /> Fax. (209)464-0138 Jeff Carruesco, REHS, RDI
<br /> Kasey Foley,REHS
<br /> January 18, 2008
<br /> Ashraf and Yasmin Ali
<br /> 20 Twelve Oaks Drive
<br /> Pleasanton, California 94566
<br /> Subject: Fast and Easy Mart No. 38
<br /> 244 West Harding Way
<br /> Stockton, California
<br /> The San Joaquin County Environmental Health Department has received and reviewed Coxae Penetrometer
<br /> Testing Report dated December 26, 2007, and Quarterly Report— Third Quarter 2007 dated December 28,
<br /> 2007, submitted by Advanced GeoEnvironmental, Inc. (AGE) on your behalf for the above-referenced site.
<br /> In both reports, AGE recommends that monitoring well MW-4, approved by EHD by letter dated December
<br /> 12, 2006, not be installed, and additional assessment to the west and northeast of the site be conducted to
<br /> delineate the lateral extent of petroleum-hydrocarbon-impacted groundwater.
<br /> EHD concurs with the recommendation by AGE not to install MW-4 approximately ten feet north of
<br /> MW-1, and in the approximate location where cone penetration test (CPT) boring CPT1 was advanced.
<br /> Based on "non-detect" analytical results for groundwater samples collected adjacent to CPT1 at
<br /> approximately 57, 75, and 107 feet below ground surface (bgs), and soil samples collected at approximately
<br /> 30, 45, and 55 feet bgs, it appears that chemicals of concern have not penetrated through the predominantly
<br /> fine-grained soils found between surface grade and approximately 50 feet bgs, making it unnecessary to
<br /> monitor the second groundwater zone.
<br /> Proceed with installing a monitoring well approximately 50 feet north/northwest of MW-3 with a screened
<br /> interval between approximately 25 and 45 feet bgs, as approved by EHD by letter dated December 12,
<br /> 2006; and submit a work plan to EHD by April 24, 2008, to investigate the petroleum-hydrocarbon-
<br /> impacted groundwater plume to the west of this site.
<br /> If you have any questions or concerns, please contact Vicki McCartney at (209) 468-9852, or by email at
<br /> vmccartney casjcehd.com.
<br /> Sincerely,
<br /> Victoria L. McCartney, Senior REHS Nuel C. Henderson,Jr., PG
<br /> Local Oversight Program Engineering Geologist
<br /> Local Oversight Program
<br /> c: Mr. Gavin D.McCreary,Advanced GeoEnvironmental, Inc., 837 Shaw Road, Stockton, CA 95215
<br /> Mr. James L.L. Barton,PG, California Regional Water Quality Control Board Central Valley Region,
<br /> 11020 Sun Center Drive, Suite 200, Rancho Cordova, CA 95670
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