FIELD DOCUMENTS AND WORK PLANS 2000-2003

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•WASTE DISCHARGE REQUIRE ORDER NO.R5-2003-XXXX SPXCORPORATION,MARLEY GING TOWER COMPANY • 7 IN SITU GROUNDWTER REMEDIATION PILOT STUDY, SAN JAOQUIN COUNTY TENTATIVE C. Groundwater Limitations: 1. The Discharger shall not cause the groundwater to contain taste and odor producing substances in concentrations that cause nuisance or adversely affect beneficial uses. 2. The Discharger shall not cause groundwater to contain waste constituents greater than background ranges listed in Finding No. 10, except for calcium, sulfate, and TDS. 3. The Discharger shall not cause an increase in any groundwater constituent above background ranges listed in Finding No. 10 in the following downgradient wells for each treatment zone: Zone 1 —MW-208; Zone 2 —MW-208 and MW-205; Zone 3 —MW-204; and Zone 4—MW- 204. Localized short-term exceedance of WQOs for sulfate and TDS may occur in close proximity to the treatment zone. Over time,the sulfate and TDS concentrations are expected to decrease to near background. 4. At the conclusion of the pilot study, the Discharger shall not cause the groundwater to contain concentrations of chemical constituents, including the injected substance, and any breakdown products or by-products of the in-situ treatment process, in amounts that adversely affect beneficial uses. D. Provisions: 1. The Discharger shall notify the Regional Board a minimum of two weeks prior to the start of Phase 1 injection of calcium polysulfide/ethanol. 2. The Discharger shall submit the results and recommendations from the Phase 1 injection for Regional Board staff review and concurrence prior to start of any field activities for the Phase 2 injection. 3. The Discharger shall provide an alternate water supply source for any municipal, domestic or other water use, if affected by the Discharger's wastes. 4. All of the following reports shall be submitted pursuant to Section 13267 of the California Water Code. In accordance with California Business and Professions Code sections 6735, 7835, and 7835.1, engineering and geologic evaluations and judgments shall be performed by or under the direction of registered professionals competent and proficient in the fields pertinent to the required activities. All technical reports specified herein that contain work plans for, that describe the conduct of investigations and studies, or that contain technical conclusions and recommendations concerning engineering and geology shall be prepared by or under the direction of appropriately qualified professional(s), even if not explicitly stated. Each technical report submitted by the Discharger shall contain a statement of qualifications of the responsible licensed professional(s) as well as the professional's signature and/or stamp of the seal. a. Within 40 days after start of injection of Phase 1 pilot study, the Discharger shall submit a report summarizing the results of the pilot test, including an assessment of calcium polysulfide/ethanol injection, and recommendations for continuing with the proposed Phase 2 pilot study. At a minimum, the report shall include: