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<br />Gi-TTLER-RYAN
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<br />August 10, 2000
<br />Mr Richard C Prima, Jr
<br />City ofLodi Public Works Director
<br />221 W6st?me Street
<br />Lodi, -GA 95240
<br />Subject: Discharge Report for July 2000, Wastewgter Dischstte Permtt#295, Farmer Chevron
<br />- Station #9-5775,301 West Kettleman Lane, Lodi, CA.
<br />Mr Prima
<br />Gettler-Ryan Inc (GR) has prepared this report at the request of CheNtron PrcZd><{cts Company Chevron
<br />discharges treated groundwater to the industrial sewer under City,
<br />,of Lodi. Wastewater Discharge Permit
<br />#295 Extraction and tre.-t hent of groundwater at the subject glg was initiated on July 3, 2000 The
<br />groundwater system (GWS),extracts impacted groundwater from w6l, EX -1. Extracted groundwater i�
<br />routed through a particulate filter, then three 2,000 -pound liquid phase a gtivated carbon vessels plumbed in
<br />series Locations of the treatment system compound and well EX 1 are shown on Figure 2 A treatment
<br />system schematic is shown on Figure 3
<br />Summary of Violations: The initial effluent sample collected Ply 6, 2000, contained very low
<br />concentrations of Total Petroleum Hydrocarbons as gasoline (TPHg), toluene and�xylenes GWS operation
<br />warshut down July 7, 2000, immediately on receipt of aifalytical data, and all fittings, hoses, etc cleaned
<br />Approximately 1,400 gallons of tap water wan then flushed through the GWS to a holding tank The
<br />confirming effluent sample collected July 10, 2000, did not contain hydrocarbon compounds, and GWS
<br />operation was resumed This was reported to the City of Lodi in a letter dated July 19, 2000
<br />Summary of GWS Operation Operation of the GWS was initiated on July 3, 2000 Samples were
<br />collected from the influent port, midpoint 1 (between the fire APO secgpd �Pa-bon vessels), midpoint 2
<br />(between the second and third carbon vessels) and efl`aent sicip)e ports,on July 6, 10, 19 ani 26, 2000
<br />During#liesesampling events, influent TPHg concentrations dropped f qm 40,000 to 1,290 par,�s per billion
<br />(ppb), liifizerie concentrations dropped from 7,300 to
<br />''-1b0 ppb, and methyl tett-butyl ether (MtBE)
<br />concenfralrons dropped from 390,000 to 197,000 ppbl As discussed above, low concentrations of TPHg,
<br />toluene and xylenes were detected in the effluent sample on July 6, 2000 Samples were analyzed by
<br />Sequoia Analytical (FLAP #1271, 1624 and 2360) Analytical data are summarized in Table 1
<br />As of the July 26, 2000, sampling event, the GWS has treated and discharged a total 6,661 gallons over a
<br />period iif 20 clays Calculated discharge rates during this period ranged from 0 12 to 0 24 gallons per minute
<br />The system has extracted approximately 0 37 pounds (lb) of TPHg, 0 042 lb of benzene and 9 40 lb of
<br />MtBE GWE operational data are summarized in Table 2
<br />346408 07
<br />6747 Sierra Court, Suite J - Dublin, California 94568 - (925) 551-7555
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