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<br /> MONITORING AND REPORTING PROGRAM ORDER NO. R5-2008-0149-XXX 4
<br /> r STALLWORTH AUTO SALES
<br /> SAN JOAQUIN COUNTY
<br /> r a Constituent suite components listed in Table 2 below
<br /> ° Well used to monitor compliance and for the presence of breakdown/byproducts of the treatment migrating beyond the expected treatment
<br /> area
<br /> s Wells used to evaluate in-situ bioremediation progress inside the treatment zone, to gauge effectiveness of ISCO injection in reducing the
<br /> dissolved petroleum hydrocarbon concentrations, and to monitor potential changes in groundwater geochemistry that could be attributed
<br /> to the injection of oxidizing agents
<br /> e Well used to evaluate migration of pollutants within the treatment zone. The transition well may or may not be within the zone of influence.
<br /> Well used to monitor the background natural changes in groundwater geochemistry in areas unaffected by oxidant injection.
<br /> e To be sampled prior to startup (baseline) and bi-weekly during pilot testing.
<br /> s All sampling conducted following a 3-well volume purge.
<br /> Table 1B : Sampling5; 5 Frequency (During Periods of No Remediation/Post-
<br /> Remediation)
<br /> Well ID Frequency Constituent Suites) fNA
<br /> onitoring Objective
<br /> MWAA, MW-2, MW-
<br /> 6, MW-7, MW-8 and Other2j4 Suites A and B
<br /> MW-10
<br /> Well IDs shown on attached Figure 4
<br /> 2 i.e. , weekly, monthly, quarterly, annually, other (bi-weekly)
<br /> a Constituent suite components listed in Table 2
<br /> ° Wells to be monitored for depth to water, presence of free product, and purge sampled weekly for a period of one month following the final
<br /> ISCO injection event to determine if breakdown/byproducts of treatment developed. If results do not indicate any development of
<br /> breakdown/byproducts from treatment, no additional samples will be collected.
<br /> All sampling conducted following a 3-well volume purge.
<br /> 6 Should adverse water quality conditions occur due to the injection of oxidants, then those wells showing impacts will be monitored and
<br /> reported bi-weekly for the injection permit constituents of concern in Suite B as identified during the pilot study until baseline is reached, per
<br /> Finding 3, page 2, paragraph 2 above
<br /> Table 2 : Analytical Methods
<br /> ConstituentMethods Maximum Practical z Frequency
<br /> Quantitation Limit (Ng/L)
<br /> Suite A
<br /> TPH-g GC/MS 50
<br /> BTEX, MTBE, TAME, As indicated in
<br /> DIPE, ETBE, TBA, 112- EPA 8260B 0. 5 -10 Table 1
<br /> DCA, EDB
<br /> Suite B
<br /> Metals, dissolved EPA 200. 7/200. 8 0. 025 - 500
<br /> Hexavalent Chromium EPA 218.6 0.2 As indicated in
<br /> Anions° EPA 300. 1 5-1000 Table 1
<br /> Ammonia as N EPA E350. 1 100
<br /> TDS EPA SM250C 10
<br /> Or an equivalent EPA Method that achieves the maximum Practical Quantitation Limit.
<br /> 2 All concentrations between the Method Detection Limit and the Practical Quantitation Limit shall be reported as an estimated value (J flag).
<br /> ' Dissolved metal analyses include AI, As, Ba, Be, Ca, Cd, Cr, Co, Cu, Fe, Hg, Mg, Mn, Mo, Ni, Na, Pb, Sb, TI, V, W, and Zn and are
<br /> collected in laboratory-supplied non-preserved container, relinquished to the lab for filtering and preservation prior to analyses.
<br /> 4 Anions include bromide, bromate, chloride,. nitrate, nitrate as N, nitrite as N, and sulfate
<br />
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