|
California gional Water Quality CCo
<br /> rol Board
<br /> Central Valley Region
<br /> Katherine Hart, Chair
<br /> Linda S.AdamsArnold
<br /> 11020 Sun Center Drive#200,Rancho Cordova,California 95670-6114
<br /> Secretary/or Schwarz
<br /> Phone(916)464-3291 •FAX(916)464-4645 negger
<br /> Environmental http://www.waterboards.ca.gov/centralvalley 0 Governor
<br /> Protection � c
<br /> 8 February 2010 /` is v
<br /> FEB O
<br /> Ms. Eugenia Valdez ENVIRO 9 4010
<br /> J&L
<br /> El Dorado Market RMs StTSERPitTH
<br /> French Camp, C95231 �
<br /> DOCUMENT REVIEW, J&L MARKET, 8125 S. EL DORADO ST., FRENCH CAMP,
<br /> SAN JOAQUIN COUNTY, CASE NO. 390897
<br /> 1 reviewed the Semi-Annual Monitoring Report Fourth Quarter 2009 (Report) received 25 January 2010
<br /> from your consultant ATC Associates, Inc. The Report states maximum groundwater monitoring
<br /> concentrations were total petroleum hydrocarbons as gasoline (TPHg), 650 micrograms per Liter
<br /> (ug/L); benzene, 65 ug/L; toluene, 1.8 ug/L; ethylbenzene, 89 ug/L; xylenes, 18 ug/L; methyl tert-butyl
<br /> ether (MTBE), 6.7 ug/L; anct1 2=dichioroethane (1, 2-DCA), 120 ug/L. With the exception of
<br /> 1,2-DCA, maximum concentrations.of all constituents declined up to three orders of magnitude from
<br /> the previous three quarters of 2009. The Report recommends the following analyses for specific
<br /> monitoring wells during the next semi-annual monitoring event (second quarter of 2010):
<br /> Monitoring Wells Recommended Constituents
<br /> JLM3, JLM5, JLM13 TPHg, TPHd, BTEX, MTBE, ETBE, DIPE, TAME, TBA, 1,2-DCA, EDB
<br /> JLM21 TPHd, BTEX, MTBE, ETBE, DIPE, TAME, TBA, 1,2-DCA, EDB
<br /> JLM4, JLM 12, JLM 20, JLM TPHd, MTBE, ETBE, DIPE, TAME, TBA, 1,2-DCA, EDB
<br /> 22, JLM 23, JLM 26
<br /> JLM14 TPHd
<br /> JLM15, JLM16 through Sample during 4 quarter of 2010 (constituents to be determined)
<br /> JLM19, JLM24 AND JLM25
<br /> TPHd—TPH as diesel; BETX—benzene, toluene, ethylbenzene, xylenes;ETBE—ethyl tertiary butyl ether; DIPE—di isopropyl
<br /> ether; TAME—tertiary amyl methyl ether; TBA—tert butyl alcohol; EDB-ethylene dibromide.
<br /> The groundwater monitoring will be reduced to the following: analyze and report semi-annually only
<br /> those constituents detected in the last four quarterly sampling events (example: for JLM3, report only
<br /> TPHg, TPHd, benzene, ethylbenzene, MTBE, TBA, and 1, 2-DCA); with the exception of sentry wells
<br /> JLM15, JLM17, JLM18 and JLM19, which shall be analyzed annually during the second semFannual
<br /> event (4th quarter) for all constituents detected onsite during the previous quarter. Further sample
<br /> reductions will be considered pending review of future monitoring reports. You may contact me
<br /> regarding questions by phone at (916) 464-4615; or for questions and status report submittals, by e-
<br /> ail at barton waterboards.ca. ov.
<br /> � 'V.4.James L.L. Barton, P.G.
<br /> Engineering Geologist
<br /> UST Enforcement Unit II
<br /> cc: Mr. Robert L'Heureux, SWRCB, UST Cleanup Fund, Sacramento
<br /> Mr. Michael. Infurna, San Joaquin County Environmental Health Department, Stockton
<br /> Mr. Todd Hafner, ATC Associates, Inc., Modesto
<br /> California Environmental Protection Agency
<br /> Q*Recycled Paper
<br />
|