**Requirements for E xisting**  **Non**
**- Emergency Spark Ignition**  **4SLB and 4SRB Stationary RICE**  **> 500 HP**  **L ocated at**  **A rea**  **S ources of HAP**  (a) Owners and operators of existing non

- emergency spark ignition four

- stroke lean burn ( 4SLB ) and four

- stroke rich burn ( 4SRB ) stationary RICE >500 HP located at area sources of HAP meeting an y of the criteria in paragraphs (a)(1) through (3) must meet identical requirements to those currentl y specified for existing non

- emergency spark ignition 4SLB and 4SRB stationary RICE ≤500 HP located at area sources of HAP (i.e., the management practices in items 7 and 9 in Table 2d to subpart ZZZZ and the operation and maintenance requirements in § 63.6625(e), (h), and (j)). (1) Stationary

RI CE located in an offshore area that is beyond th e line of ordinary low water along that portion of the coast of the United States that is in direct contact with the open seas and beyond the line marking the seaward limit of inland waters. (2) Stationary

RI CE located on a pipeline segment that meets both of the criteria in paragraphs (a)(2)(i) and (ii). (i) A pipeline segment with 10 or fewer buildings intended for human occupancy within 220 y ards (200 meters) on either side of the centerline of an y continuous 1

- mile (1.6 kilometers) length of pipeline. Each separate dwelling unit in a multiple dwelling unit building is counted as a separate building intended for human occupancy

. (ii) The pipeline segment does not lie within 100 yards (91 meters) of either a building or a small, well

defined outside are a (such as a playground, recreation area, outdoor theater, or other place of public assembly) that is occupied by 20 or more persons on at least 5 day s a week for 10 weeks in an y 12

- month period. The day s and weeks need not be consecutive. The building or area is considered occupied for a full day

if it is occupied for an y portion of the day

. (iii) For purposes of this paragraph (2), the term pipeline segment means all parts of those phy sical facilities through which gas moves in transportation, including but not limited to pipe, valves, and other appurtenance attached to pipe, compressor units, metering stations, regulator stations, delivery stations, holders, and fabricated assemblies. Stationary RICE located within 50 y ards (46 m) of the pipeline segment providing power for equipment on a pipeline segment are part of the pipeline segment. Transportation of gas means the gathering, transmission, or distribution of gas b y pipeline, or the storage of gas. A building is intended for human occupancy if its primary

use is for a purpose involving the presence of humans. (3) Stationary

RI CE that are not located on pipelines and that have 5 or fewer buildings intended for human occupancy

within a 0.25 mile radius around the engine. (b) Owners and operators of ex isting non

- emergency spark ignition 4SLB and 4SRB stationary RICE >500 HP located at area sources of HAP meeting the criteria in paragraph (a) must evaluate the status of their stationary

RI CE every

12 months. If the stationary RI CE no longer meets the criteria in paragraph (a), the owner or operator must comply with the requirements specified in paragraph (c) within one y ear. (c) Owners and operators of existing non

- emergency spark ignition 4SLB and 4SRB stationary RICE >500 HP located at area sources of HAP that do not meet the criteria in paragraph (a) must meet the requirements of this paragraph (c).(1) Install a catal ys t to reduce emissions of HAP.

(2) Meet the requirements of paragraph (i) or (ii): (i) Continuously

monitor the catal ys t inlet temperature and maintain the temperature between the specified range in subpart ZZZZ, or (ii) Equip the engine with automated shutdown so that the catal ys t inlet temperature does not exceed the specified maximum temperature of the range in subpart ZZZZ. (3) Conduct an initial test, and subsequent annual tests, to show the catal ys t reduces emissions as specified in paragraphs (c)(3)(i) and (ii). The initial test mu st consist of three test runs. Each subsequent annual test must consist of one test run. Eac h test run must be of at least 15 minute duration , except that e ach test run with CTM

- 034 must consist of one measurement cycle as defined by the method and include at least 2 minutes of test data phase measurement. (i) For 4SLB stationary

RI CE, CO emissions must be reduced by 93 percent or more, or limited to 47 ppmvd at 15% O 2 . (ii) For 4SRB stationary

RI CE, CO must be reduced by 75 percent or more, or alternativel y, THC must be reduced b y 30 percent or more. (4) The CO and O 2 testing required i n paragraph (c)(3) can be conducted using EPA Conditional Test Method 034 or the methods alread y specified in subpart ZZZZ. The THC testing required in paragraph (c)(3) can be conducted using EPA Method 25A. (5) If an y of the tests required in paragraph (c)(3) show that the emissions exceed the levels specified in paragraph (c)(3), the stationary RI CE must be shut down as soon as safel y possible and appropriate corrective action must be taken (e.g., repairs, the cataly st cleaned or replaced). The stationary RICE must be retested within 7 day s of being restarted and the emissions must meet the levels specified in paragraph (c)(3). If the retest shows that the emissions continue to exceed the specified levels, the stationary RICE must again be shut down as s oon as safel y possible, and the engine may not operate, except for purposes of start

- up and testing, until the owner/operator demonstrates through testing that the emissions do not exceed the levels specified in paragraph (c)(3). (6) Failure to meet an y of the requirements of paragraphs (c)(1), (c)(2), and (c)(5) is a violation of subpart ZZZZ. Failure to conduct an initial test and subsequent annual tests, as specified in paragraph (c)(3), is a violation of subpart ZZZZ.