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Parkinson's I-5 ARCO Service Station Page 2
<br /> 3250 West Hammer Lane October 10,2008
<br /> Stockton, California 95209
<br /> samples will be analyzed for GRO, BTEX, MTBE, TBA, DIPE, ETBE, TAME, acetone,
<br /> aluminum, arsenic, barium, calcium, total chromium, chromium VI, copper, potassium,
<br /> magnesium, manganese, and nickel; and groundwater samples will be analyzed for GRO, BTEX,
<br /> MTBE, TBA, DIPE, ETBE, TAME, acetone, aluminum, arsenic, barium, calcium, total
<br /> chromium, chromium VI, copper, potassium, magnesium, manganese, nickel, ammonia, nitrogen,
<br /> bromate, bromide, chemical oxygen demand (COD), nitrite, nitrate, orthophosphate, sulfide,
<br /> sulfate, and total organic carbon(TOC).
<br /> Following the five-part-reactor test that identifies whether ozone and hydrogen peroxide will
<br /> reduce petroleum hydrocarbons in soil and groundwater mixtures, groundwater samples and off-
<br /> gasses generated and collected in Tedlar bags, will be analyzed for petroleum hydrocarbons that
<br /> the EHD assumes will be GRO, BTEX, MTBE, TBA,DIPE, ETBE, TAME, 1,2-DCA, and EDB;
<br /> and aqueous samples from the reactors will be analyzed for aluminum, arsenic, barium, calcium,
<br /> total chromium, chromium VI, copper, potassium, magnesium, manganese, nickel, ammonia,
<br /> nitrogen, bromate, bromide, chemical oxygen demand (COD), nitrite, nitrate, orthophosphate,
<br /> sulfide, and sulfate. If either chromium VI or bromate is formed during ozone injection,
<br /> additional tests will be conducted to assess natural attenuation. For the Central Valley Regional
<br /> Water Quality Control Board to evaluate the necessity to issue a waste discharge requirement
<br /> (WDR) permit, the proposed ozone bench-scale test must also include the analyses for total and
<br /> dissolved iron, total lead, pH, total cadmium, total selenium, total dissolved solids, chloride,
<br /> fluoride, antimony, beryllium, cobalt, mercury, molybdenum, silver, sodium, thallium,
<br /> tungsten, vanadium,zinc,and oxidation-reduction potential.
<br /> Please submit a brief work plan addendum that includes the above-listed analytes. Also clarify
<br /> the analyses for petroleum hydrocarbons includes GRO, BTEX, MTBE, TBA, DIPE, ETBE,
<br /> TAME, 1,2-DCA, and EDB.
<br /> Table 2 of the work plan is incomplete. Soil samples identified as D-1 through D-8 and P-1
<br /> through P-6 have results reported as ND instead of less-than the reporting limit; and soil results
<br /> have not been reported for toluene, ethyl benzene, total xylenes, TBA, TAME, DIPE, and ETBE.
<br /> The date for collecting the soil samples should be January 7, 2000. Soil samples collected on
<br /> January 26, 2000, are missing analytical results for MTBE, TBA, TAME, ETBE, DIPS, 1,2-
<br /> DCA, EDB, and methanol. Table 3 has incorrect results for TBA reported for groundwater
<br /> samples collected from GP-2, GP-3, GP-4, and GP-5. Please revise and resubmit Tables 2 and 3.
<br /> If you have any questions, please contact Vicki McCartney, Senior Registered Environmental
<br /> Health Specialist,by telephone at(209)468-9852 or by email at vmccartney(ct�sjcehd.com.
<br /> Sincerely,
<br /> Victoria L. McCartney, REHS Nuel C. Henderson,Jr.,PG
<br /> Senior Registered Environmental Health Specialist Engineering Geologist
<br /> c: Mr. James L.L. Barton, PG, California Regional Water Quality Control Board Central Valley
<br /> Region, 11020 Sun Center Drive, Suite 200, Rancho Cordova, California 95670
<br /> Ms. Sarah O. Salcedo, PG, Stratus Environmental, Inc., 3330 Cameron Park Drive, Suite 550,
<br /> Cameron Park, California 95682
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