|
San Joaquin County DIRECTOR
<br /> Donna Heran, REHS
<br /> t Environmental Health Department p Assrsraxr DIRECTOR
<br /> 600 East Main Street LaurieCotuha,RENS
<br /> N Stockton, California 95202-3029 PROGRAM COORDINATORS
<br /> :. Carl Borgman,REHS
<br /> Mike Huggins, RENS, RDI
<br /> Website: www.sjgov.org/ehd Margaret Lagorio, REHS
<br /> Phone: (209) 468-3420 Robert McClellon, RENS
<br /> Fax: (209)464-0938 .teff Carruesco,RENS,RDI
<br /> Kasey Foley, REHS
<br /> January 23, 2009
<br /> Mr. Arnrit Grewal
<br /> Grewal's Market
<br /> 4100 East Fremont Street
<br /> Stockton, California 95215
<br /> Subject: Grewal's Market
<br /> 4100 East Fremont Street
<br /> Stockton, CA 95215
<br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Cone Penetration
<br /> Testing Site Investigation —Second Quarter 2008, dated October 14, 2008, and Quarterly Report—
<br /> Fourth Quarter 2008, dated January 16, 2009, prepared and submitted by Advanced
<br /> GeoEnvironmental, Inc. (AGE) on your behalf for the above-referenced site. Total petroleum
<br /> hydrocarbons quantified as gasoline (TPH-g) were detected at 800 micrograms per liter (pg/L) in
<br /> groundwater samples collected at sixty-five to seventy-five feet below surface grade (bsg) from
<br /> cone penetration testing (CPT) boring P-1513. Methyl tertiary-butyl ether (MTBE) continues to be
<br /> detected at approximately the California Department of Public Health primary maximum
<br /> contaminant level (MCL) of 13 pg/L in groundwater collected quarterly from monitoring well
<br /> MW-2, and 1,2-dichloroethane (1,2-DCA) continues to be detected above the MCL of 0.5 µg/L in
<br /> groundwater collected quarterly from monitoring well MW-4. For these reasons, the EHD
<br /> conditionally approves the installation of one additional monitoring well (MW-5) at 716 North Oro
<br /> Street, as proposed by AGE in Revision to Work Plan Addendum-December 2007, dated March 5,
<br /> 2008. Instead of the well being screened between approximately forty-five and sixty-five feet bsg,
<br /> the EHD directs that MW-5 be installed with a ten-foot screen and include the soil interval from
<br /> sixty-five to seventy-three feet bsg to target the sand unit encountered in nearby CPT boring P-1 5B.
<br /> Please submit a copy of the access agreement, a well permit application, and permit/inspection fee
<br /> of$404.00 to the EHD and complete the fieldwork by March 30, 2009. Notify the EHD at least
<br /> one week prior to the scheduled work date.
<br /> Analyze groundwater samples collected from MW-5 for TPH-g; total petroleum hydrocarbons
<br /> quantified as diesel (TPH-d); benzene, toluene, ethyl benzene, and total xylenes (BTEX); MTBE,
<br /> tertiary-butyl alcohol (TBA), di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), tertiary
<br /> amyl methyl ether (TAME), 1,2-dibromoethane (EDB), and 1,2-DCA. Analyze groundwater
<br /> collected from the four onsite wells only for TPH-g, BTEX, MTBE, and 1,2-DCA since groundwater
<br /> results for TPH-d, TBA, DIPE, ETBE, TAME, and EDB have been reported as "non-detect" since
<br /> January 2004 for these wells. Also, the EHD approves a reduction in sampling MWA and MW-3
<br /> from quarterly to annually. Continue collecting depth-to-water measurements in all wells during each
<br /> quarterly groundwater monitoring event for the purpose of determining the groundwater gradient.
<br />
|